1
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Hames NT, Balsbough D, Yan J, Wu S, Zuo X, Spontak RJ. Tunable thermoplastic elastomer gels derived from controlled-distribution triblock copolymers with crystallizable endblocks. MATERIALS HORIZONS 2023; 10:4968-4975. [PMID: 37622215 DOI: 10.1039/d3mh01018j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Thermoplastic elastomers (TPEs), a commercially important category of triblock copolymers, are employed alone or upon physical modification with a midblock-selective oil (to form TPE gels, TPEGs) in a broad range of contemporary technologies. While most copolymers in this class of self-networking macromolecules possess glassy polystyrene endblocks and a rubbery polydiene or polyolefin midblock, we investigate TPEGs fabricated from a novel controlled-distribution copolymer with crystallizable polyolefin endblocks and a random-copolymer midblock. According to both electron microscopy and small-angle scattering, the morphologies of these TPEGs remain largely invariant up to 40 wt% oil and then transform considerably at higher oil levels. Although reductions in endblock melting point and crystallinity measured by thermal calorimetry accompany increasing oil content, mechanical properties such as the uniaxial strain at break and fracture toughness improve in some cases by over 50% between 5 and 40 wt% oil. In fact, the strain at break can reach 2500% within this range, thereby confirming that (i) the structure-property relationships of these unique TPEGs are highly composition-tunable and (ii) these TPEGs, stabilized by crystallizable endblocks, provide an attractive alternative for ultrasoft and stretchy recyclable materials.
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Affiliation(s)
- Nathan T Hames
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
| | - Drew Balsbough
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
| | - Jiaqi Yan
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
| | - Siyu Wu
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Xiaobing Zuo
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Richard J Spontak
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
- Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC 27695, USA
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2
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Song L, Cong F, Wang W, Ren J, Chi W, Yang B, Zhang Q, Li Y, Li X, Wang Y. The Effect of Functionalized SEBS on the Properties of PP/SEBS Blends. Polymers (Basel) 2023; 15:3696. [PMID: 37765550 PMCID: PMC10535659 DOI: 10.3390/polym15183696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/29/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Styrene (St) was used as comonomer and glycidyl methacrylate (GMA) as grafting monomer to prepare SEBS-g-(GMA-co-St) graft copolymers via melt grafting. Then, the graft copolymers were employed as a compatibilizer for melt blending polypropylene (PP) and hydrogenated styrene-butadiene-styrene (SEBS) triblock copolymers. The effects of the amount of GMA in the graft copolymers on thermal properties, rheology, crystallization, optical and mechanical properties, and microstructure of the blends were investigated. The results show that GMA and St were successfully grafted onto SEBS. The GMA amount in the graft copolymer significantly influenced the comprehensive properties of PP/SEBS/SEBS-g-(GMA-co-St) blends. The epoxy groups of GMA reacted with PP and SEBS, forming interfacial chemical bonds, thereby enhancing the compatibility between PP and SEBS to varying extents. After introducing SEBS-g-(GMA-co-St) into PP/SEBS blends, crystallinity decreased, crystal size increased while transmittance remained above 91% with rising GMA amount in the graft copolymers, indicating excellent optical properties. Notched impact strength and elongation at break of the blends showed a trend of first increasing and then decreasing with increased amounts of GMA in the graft copolymers. When the amount of GMA in the graft copolymers was 3 wt%, the blends exhibited optimal toughness with notched impact strength and elongation at break of 30,165.82 J/m2 and 1445.40%, respectively. This was attributed to the tightest dispersion interface adhesion and maximum matrix plastic deformation, consistent with the mechanical performance results.
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Affiliation(s)
- Lixin Song
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Fei Cong
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Wei Wang
- BatteroTech Co., Ltd., Shanghai 201417, China
| | - Jiannan Ren
- AVIC Shenyang Aircraft Corporation, Shenyang 110850, China
| | - Weihan Chi
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Bing Yang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Qian Zhang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yongchao Li
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Xianliang Li
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yuanxia Wang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
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3
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Zhao SQ, Feng JC. Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2789-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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4
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Jaspreet Singh Aulakh, Deepika P. Joshi. Development of Paraffin-Based Shape-Stable Phase Change Material for Thermal Energy Storage. POLYMER SCIENCE SERIES A 2022. [DOI: 10.1134/s0965545x22200056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Basak S, Bandyopadhyay A. Styrene‐butadiene‐styrene
‐based shape memory polymers: Evolution and the current state of art. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sayan Basak
- Department of Polymer Science & Technology University of Calcutta Kolkata West Bengal India
| | - Abhijit Bandyopadhyay
- Department of Polymer Science & Technology University of Calcutta Kolkata West Bengal India
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6
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Zhao S, Yue Y, Wang X, Feng J. Microstructure evolution during cooling and reheating of the physical gel composed of SEBS copolymer and crystallizable paraffin. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Du H, Marin Angel J, Basak S, Lai TY, Cavicchi KA. Cross-linked Poly(Octadecyl Acrylate)/Polybutadiene Shape Memory Polymer Blends Prepared by Simultaneous Free Radical Cross-linking, Grafting and Polymerization of Octadecyl Acrylate/Polybutadiene Blends. Macromol Rapid Commun 2021; 42:e2100072. [PMID: 33759273 DOI: 10.1002/marc.202100072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/09/2021] [Indexed: 11/08/2022]
Abstract
A semi-crystalline, shape memory polymer (SMP) is fabricated by free radical cross-linking, polymerization, and grafting in a blend of n-octadecyl acrylate and polybutadiene (PB). Poly(n-octadecyl acrylate) (PODA) is a side-chain crystalline polymer, which serves as the structure-fixing network counterbalancing the elastically deformed, cross-linked polymer network. At a constant 50/50 ratio of monomer and polymer the amount of free radical initiator, dicumyl peroxide (DCP) is varied from 1% to 5% w/w PB. From swelling measurements and calculation of the cross-link density it is determined that DCP produces greater than one cross-link per DCP molecule. It is found that lower cross-linking efficiency is favorable for higher shape fixity. This lower efficiency is found to produce a higher degree of crystallinity of the PODA in the 2-5% DCP samples, which is determined to be the main driver of higher shape fixity of the polymer. A SMP with >90% fixity and 100% recovery at uniaxial strains from 34-79% is achieved. This material should be useful for mold processing of shape memory articles. This approach provides a method to decouple the elastomeric and thermoplastic portions of a SMP to convert commodity elastomers into SMPs and tailor the shape memory response.
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Affiliation(s)
- Haiyan Du
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Juan Marin Angel
- School of Polymer Science and Polymer Engineering, University of Akron, 250 S Forge St, Akron, OH, 44325-0301, USA
| | - Sayan Basak
- School of Polymer Science and Polymer Engineering, University of Akron, 250 S Forge St, Akron, OH, 44325-0301, USA
| | - Tzu-Yu Lai
- School of Polymer Science and Polymer Engineering, University of Akron, 250 S Forge St, Akron, OH, 44325-0301, USA
| | - Kevin A Cavicchi
- School of Polymer Science and Polymer Engineering, University of Akron, 250 S Forge St, Akron, OH, 44325-0301, USA
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8
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Xiang B, Yang Z, Zhang J. ASA
/
SEBS
/paraffin composites as phase change material for potential cooling and heating applications in building. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5097] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Bo Xiang
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- College of Science, Nanjing Forestry University Nanjing China
| | - Zhangbin Yang
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing China
| | - Jun Zhang
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing China
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9
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Rickert R, Klein R, Schönberger F. Form-Stable Phase Change Materials Based on SEBS and Paraffin: Influence of Molecular Parameters of Styrene-b-(Ethylene- co-Butylene)-b-Styrene on Shape Stability and Retention Behavior. MATERIALS (BASEL, SWITZERLAND) 2020; 13:ma13153285. [PMID: 32718015 PMCID: PMC7435445 DOI: 10.3390/ma13153285] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/08/2020] [Accepted: 07/15/2020] [Indexed: 06/11/2023]
Abstract
In this work, the influence of molecular parameters of styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) triblock copolymer as matrix material in form-stable phase change material (FSPCM) on the thermo-mechanical properties and leakage behavior are studied. Various SEBS grades differing in their molecular weight, styrene content, and ethylene/butylene ratio are used as supporting matrix in composites with 90 wt.% paraffin. Thermo-mechanical properties are determined by rheological measurements. The results show phase transitions temperatures from solid to hard gel, hard gel to soft gel, and soft gel to gel fluid. Paraffin leakage in FSPCM is analyzed by mass loss over time in an oven at 60 °C. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) are applied to determine the thermal energy storage capacity. Finally, the molecular weight and the styrene content are combined to the molecular weight of styrene block which is identified as the authoritative parameter for the thermo-mechanical properties of the SEBS/PCM composite.
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10
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Yan J, Yan S, Tilly JC, Ko Y, Lee B, Spontak RJ. Ionic complexation of endblock-sulfonated thermoplastic elastomers and their physical gels for improved thermomechanical performance. J Colloid Interface Sci 2020; 567:419-428. [PMID: 32088505 DOI: 10.1016/j.jcis.2020.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/02/2020] [Accepted: 02/03/2020] [Indexed: 11/20/2022]
Abstract
Thermoplastic elastomers (TPEs) composed of nonpolar triblock copolymers constitute a broadly important class of (re)processable network-forming macromolecules employed in ubiquitous commercial applications. Physical gelation of these materials in the presence of a low-volatility oil that is midblock-selective yields tunably soft TPE gels (TPEGs) that are suitable for emergent technologies ranging from electroactive, phase-change and shape-memory responsive media to patternable soft substrates for flexible electronics and microfluidics. Many of the high-volume TPEs used for these purposes possess styrenic endblocks that are inherently limited by a relatively low glass transition temperature. To mitigate this shortcoming, we sulfonate and subsequently complex (and physically crosslink) the endblocks with trivalent Al3+ ions. Doing so reduces the effective hydrophilicity of the sulfonated endblocks, as evidenced by water uptake measurements, while concurrently enhancing the thermomechanical stability of the corresponding TPEGs. Chemical modification results, as well as morphological and property development, are investigated as functions of the degree of sulfonation, complexation and TPEG composition.
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Affiliation(s)
- Jiaqi Yan
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Shaoyi Yan
- Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Joseph C Tilly
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Yeongun Ko
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Byeongdu Lee
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Richard J Spontak
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA; Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC 27695, USA.
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11
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Lai SM, Guo GL, Han KT, Huang PS, Huang ZL, Jiang MJ, Zou YR. Properties and characterization of near infrared-triggered natural rubber (NR)/carnauba wax (CW)/carbon nanotube (CNT) shape memory bio-nanocomposites. JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-019-1742-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Armstrong DP, Spontak RJ. Dielectric and Resistive Heating of Polymeric Media: Toward Remote Thermal Activation of Stimuli-Responsive Soft Materials. Macromol Rapid Commun 2018; 40:e1800669. [PMID: 30536997 DOI: 10.1002/marc.201800669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 10/23/2018] [Indexed: 11/08/2022]
Abstract
Stimuli-responsive soft materials are becoming increasingly important in a wide range of contemporary technologies, and methods by which to promote thermal stimulation remotely are of considerable interest for controllable device deployment, particularly in inaccessible environments such as outer space. Until now, remote thermal stimulation of responsive polymers has relied extensively on the use of nanocomposites wherein embedded nanoparticles/structures are selectively targeted for heating purposes. In this study, an alternative remote-heating mechanism demonstrates that the dielectric and resistive thermal losses introduced upon application of an alternating current generate sufficient heat to raise the temperature of a neat polyimide by over 70 °C within ≈10 s. Thermal imaging is used here to measure current-induced temperature changes of polymeric media, and a proposed analytical model yields predictions that compare reasonably well with experimental data, confirming that such remote heating is viable. Conditions permitting a shape-memory polymer possessing a melting transition and susceptible to dielectric actuation to achieve continuous electrostrain-temperature cycling are identified.
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Affiliation(s)
- Daniel P Armstrong
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA
| | - Richard J Spontak
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA.,Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC, 27695, USA
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13
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14
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Tuhin MO, Ryan JJ, Sadler JD, Han Z, Lee B, Smith SD, Pasquinelli MA, Spontak RJ. Microphase-Separated Morphologies and Molecular Network Topologies in Multiblock Copolymer Gels. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00853] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | - J. David Sadler
- Corporate Research & Development, The Procter & Gamble Company, Cincinnati, Ohio 45224, United States
| | - Zexiang Han
- Department of Materials, Imperial College London, London SW7 2AZ, U.K
| | - Byeongdu Lee
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Steven D. Smith
- Corporate Research & Development, The Procter & Gamble Company, Cincinnati, Ohio 45224, United States
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15
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Tuhin MO, Woloszczuk S, Mineart KP, Pasquinelli MA, Sadler JD, Smith SD, Banaszak M, Spontak RJ. Communication: Molecular-level description of constrained chain topologies in multiblock copolymer gel networks. J Chem Phys 2018; 148:231101. [DOI: 10.1063/1.5037231] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Mohammad O. Tuhin
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina
27695, USA
| | | | - Kenneth P. Mineart
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina
27695, USA
| | - Melissa A. Pasquinelli
- Fiber and Polymer Science Program, North Carolina State University, Raleigh, North Carolina 27695,
USA
| | - J. David Sadler
- Corporate Research and Development, The Procter and Gamble Company, Cincinnati, Ohio 45224, USA
| | - Steven D. Smith
- Corporate Research and Development, The Procter and Gamble Company, Cincinnati, Ohio 45224, USA
| | - Michal Banaszak
- Faculty of Physics, Adam Mickiewicz University, 61-614 Poznan, Poland
- NanoBioMedical Centre, Adam Mickiewicz University, 61-614 Poznan, Poland
| | - Richard J. Spontak
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina
27695, USA
- NanoBioMedical Centre, Adam Mickiewicz University, 61-614 Poznan, Poland
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695,
USA
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16
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Zhou J, Cao H, Chang R, Shan G, Bao Y, Pan P. Stereocomplexed and Homochiral Polyurethane Elastomers with Tunable Crystallizability and Multishape Memory Effects. ACS Macro Lett 2018; 7:233-238. [PMID: 35610899 DOI: 10.1021/acsmacrolett.7b00995] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Design of the polymer networks with tunable mechanical properties and multishape memory effects (multi-SMEs) is highly desired in the engineering applications. Herein, we report on the stereocomplexed and homochiral polyurethane (PU) elastomers with tunable multi-SMEs by cross-linking the triblock prepolymers bearing the poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) enantiomeric segments. The homochiral PU is nearly amorphous, yet the stereocomplexed PU becomes highly crystalline due to the stereocomplexation of enantiomeric segments. Moreover, the two distinct thermal (glass, melting) transitions of PLLA (or PDLA) segments in PUs are integrated to realize the thermally induced triple- and quadruple-SMEs. Control over the enantiomeric segmental ratios allows the feasible manipulation of crystallizability, mechanical and thermal properties, and multi-SMEs of PUs.
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Affiliation(s)
- Jian Zhou
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Heqing Cao
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Ruoxing Chang
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Guorong Shan
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Yongzhong Bao
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Pengju Pan
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
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17
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Ashraf AR, Ryan JJ, Satkowski MM, Smith SD, Spontak RJ. Effect of Systematic Hydrogenation on the Phase Behavior and Nanostructural Dimensions of Block Copolymers. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3186-3190. [PMID: 29356497 DOI: 10.1021/acsami.7b19433] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Unsaturated polydienes are frequently hydrogenated to yield polyolefins that are more chemically stable. Here, the effects of partial hydrogenation on the phase behavior and nanostructure of polyisoprene-containing block copolymers are investigated. To ensure access to the order-disorder transition temperature (TODT) over a wide temperature range, we examine copolymers with at least one random block. Dynamic rheological and scattering measurements indicate that TODT increases linearly with increasing hydrogenation. Small-angle scattering reveals that the temperature-dependence of the Flory-Huggins parameter changes and the microdomain period increases, while the interfacial thickness decreases. The influence of hydrogenation becomes less pronounced in more constrained multiblock copolymers.
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Affiliation(s)
- Arman R Ashraf
- Corporate Research & Development, The Procter & Gamble Company , Cincinnati, Ohio 45224, United States
| | | | - Michael M Satkowski
- Corporate Research & Development, The Procter & Gamble Company , Cincinnati, Ohio 45224, United States
| | - Steven D Smith
- Corporate Research & Development, The Procter & Gamble Company , Cincinnati, Ohio 45224, United States
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18
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Pantoja M, Lin Z, Cakmak M, Cavicchi KA. Structure-property relationships of fatty acid swollen, crosslinked natural rubber shape memory polymers. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24578] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Marcos Pantoja
- Department of Polymer Engineering; University of Akron; Akron Ohio 44325-0301
| | - Zhiwei Lin
- Department of Polymer Science; University of Akron; Akron Ohio 44325-3909
| | - Mukerrem Cakmak
- Department of Polymer Engineering; University of Akron; Akron Ohio 44325-0301
- Departments of Materials and Mechanical Engineering; Purdue University; West Lafayette Indiana 47907
| | - Kevin A. Cavicchi
- Department of Polymer Engineering; University of Akron; Akron Ohio 44325-0301
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19
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Chen S, Ban J, Mu L, Zhuo H. Development of liquid crystalline polyurethane composites with stage-responsive shape memory effects. Polym Chem 2018. [DOI: 10.1039/c7py01913k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Novel liquid crystalline shape memory polymer composites with interesting staging-responsive shape memory properties were successfully prepared. The liquid crystalline shape memory polymer composites maintain the intrinsic reversible liquid crystalline properties of Azo11.
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Affiliation(s)
- Shaojun Chen
- Guangdong Research Center for Interfacial Engineering of Functional Materials; Shenzhen Key Laboratory of Polymer Science and Technology
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen 518060
- China
| | - Jianfeng Ban
- Guangdong Research Center for Interfacial Engineering of Functional Materials; Shenzhen Key Laboratory of Polymer Science and Technology
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen 518060
- China
| | - Luona Mu
- College of Chemistry and Chemical Engineering
- Shenzhen University
- Shenzhen
- China
| | - Haitao Zhuo
- College of Chemistry and Chemical Engineering
- Shenzhen University
- Shenzhen
- China
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20
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21
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Li H, Luo Y, Gao X. Core-shell nano-latex blending method to prepare multi-shape memory polymers. SOFT MATTER 2017; 13:5324-5331. [PMID: 28695221 DOI: 10.1039/c7sm00899f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Multi-shape memory polymers were prepared by blending a series of styrene (St)-block-(styrene-random-meth acrylate (MA))-block-styrene triblock copolymer nano-latexes. These latexes synthesized using a reversible addition-fragmentation chain transfer (RAFT) emulsion polymerization method have a core-shell structure. The cores are formed by the middle poly(St-random-MA) blocks. They act as transition phases with variable transition temperatures via adjusting the St/MA ratio. When the latexes are blended with an identical PSt shell but different poly(St-random-MA) cores, the shells play a role in preventing the aggregation of these poly(St-random-MA) cores forming a crosslinked network after hot-press treatment. Therefore a polymer with well-distributed multiple nanophases is achieved, which shows a quadruple-shape memory behavior. Furthermore, the shape memory and recovery performance at a certain temperature can be improved on purpose by increasing the mass ratio of the corresponding transition phases, which can be realized via simply varying the blending ratio of different latexes. An optimized multi-shape memory polymer with the shape memory and recovery ratio higher than 80% at all the transition temperatures is achieved.
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Affiliation(s)
- Hongze Li
- The State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, China.
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22
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Gupta P, Bera M, Maji PK. Nanotailoring of sepiolite clay with poly [styrene-b-(ethylene-co-butylene)-b-styrene]: structure-property correlation. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pragya Gupta
- Department of Polymer and Process Engineering; Indian Institute of Technology Roorkee; Saharanpur campus Saharanpur U.P. India
| | - Madhab Bera
- Department of Polymer and Process Engineering; Indian Institute of Technology Roorkee; Saharanpur campus Saharanpur U.P. India
| | - Pradip K. Maji
- Department of Polymer and Process Engineering; Indian Institute of Technology Roorkee; Saharanpur campus Saharanpur U.P. India
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23
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Huang L, Jiang R, Wu J, Song J, Bai H, Li B, Zhao Q, Xie T. Ultrafast Digital Printing toward 4D Shape Changing Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1605390. [PMID: 27936286 DOI: 10.1002/adma.201605390] [Citation(s) in RCA: 192] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 10/29/2016] [Indexed: 06/06/2023]
Abstract
Ultrafast 4D printing (<30 s) of responsive polymers is reported. Visible-light-triggered polymerization of commercial monomers defines digitally stress distribution in a 2D polymer film. Releasing the stress after the printing converts the structure into 3D. An additional dimension can be incorporated by choosing the printing precursors. The process overcomes the speed limiting steps of typical 3D (4D) printing.
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Affiliation(s)
- Limei Huang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Ruiqi Jiang
- Soft Matter Research Center, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Jingjun Wu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jizhou Song
- Soft Matter Research Center, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Hao Bai
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Bogeng Li
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Qian Zhao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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24
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Mineart KP, Tallury SS, Li T, Lee B, Spontak RJ. Phase-Change Thermoplastic Elastomer Blends for Tunable Shape Memory by Physical Design. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b04039] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Kenneth P. Mineart
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Syamal S. Tallury
- Department of Materials Science & Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
- Fiber & Polymer Science Program, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Tao Li
- Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Byeongdu Lee
- Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Richard J. Spontak
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
- Department of Materials Science & Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
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25
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Armstrong DP, Mineart KP, Lee B, Spontak RJ. Olefinic Thermoplastic Elastomer Gels: Combining Polymer Crystallization and Microphase Separation in a Selective Solvent. ACS Macro Lett 2016; 5:1273-1277. [PMID: 35614739 DOI: 10.1021/acsmacrolett.6b00677] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Since selectively swollen thermoplastic elastomer gels (TPEGs) afford a wide range of beneficial properties that open new doors to developing elastomer-based technologies, we examine the unique structure-property behavior of TPEGs composed of olefinic block copolymers (OBCs) in this study. Unlike their styrenic counterparts typically possessing two chemically different blocks, this class of multiblock copolymers consists of linear polyethylene hard blocks and poly(ethylene-co-α-octene) soft blocks, in which case, microphase separation between the hard and the soft blocks is accompanied by crystallization of the hard blocks. Here, we prepare olefinic TPEGs (OTPEGs) through the incorporation of a primarily aliphatic oil that selectively swells the soft block and investigate the resultant morphological features through the use of polarized light microscopy and small-/wide-angle X-ray scattering. These features are correlated with thermal and mechanical property measurements from calorimetry, rheology, and extensiometry to elucidate the roles of crystallization and self-assembly on gel characteristics and establish useful structure-property relationships.
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Affiliation(s)
| | | | - Byeongdu Lee
- Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
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26
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Qi X, Guo Y, Wei Y, Dong P, Fu Q. Multishape and Temperature Memory Effects by Strong Physical Confinement in Poly(propylene carbonate)/Graphene Oxide Nanocomposites. J Phys Chem B 2016; 120:11064-11073. [DOI: 10.1021/acs.jpcb.6b08536] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaodong Qi
- College of Polymer
Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Yilan Guo
- College of Polymer
Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Yuan Wei
- College of Polymer
Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Peng Dong
- College of Polymer
Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Qiang Fu
- College of Polymer
Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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27
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Tallury SS, Pourdeyhimi B, Pasquinelli MA, Spontak RJ. Physical Microfabrication of Shape-Memory Polymer Systems via Bicomponent Fiber Spinning. Macromol Rapid Commun 2016; 37:1837-1843. [DOI: 10.1002/marc.201600235] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 08/10/2016] [Indexed: 01/19/2023]
Affiliation(s)
- Syamal S. Tallury
- Fiber & Polymer Science Program; North Carolina State University; Raleigh NC 27695 USA
- Department of Materials Science & Engineering; North Carolina State University; Raleigh NC 27695 USA
| | - Behnam Pourdeyhimi
- Fiber & Polymer Science Program; North Carolina State University; Raleigh NC 27695 USA
- The Nonwovens Institute; North Carolina State University; Raleigh NC 27695 USA
| | | | - Richard J. Spontak
- Department of Materials Science & Engineering; North Carolina State University; Raleigh NC 27695 USA
- Department of Chemical & Biomolecular Engineering; North Carolina State University; Raleigh NC 27695 USA
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28
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Ban J, Zhu L, Chen S, Wang Y. The Effect of 4-Octyldecyloxybenzoic Acid on Liquid-Crystalline Polyurethane Composites with Triple-Shape Memory and Self-Healing Properties. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E792. [PMID: 28773914 PMCID: PMC5457044 DOI: 10.3390/ma9090792] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 09/08/2016] [Accepted: 09/12/2016] [Indexed: 11/16/2022]
Abstract
To better understand shape memory materials and self-healing materials, a new series of liquid-crystalline shape memory polyurethane (LC-SMPU) composites, named SMPU-OOBAm, were successfully prepared by incorporating 4-octyldecyloxybenzoic acid (OOBA) into the PEG-based SMPU. The effect of OOBA on the structure, morphology, and properties of the material has been carefully investigated. The results demonstrate that SMPU-OOBAm has liquid crystalline properties, triple-shape memory properties, and self-healing properties. The incorporated OOBA promotes the crystallizability of both soft and hard segments of SMPU, and the crystallization rate of the hard segment of SMPU decreases when the OOBA-content increases. Additionally, the SMPU-OOBAm forms a two-phase separated structure (SMPU phase and OOBA phase), and it shows two-step modulus changes upon heating. Therefore, the SMPU-OOBAm exhibits triple-shape memory behavior, and the shape recovery ratio decreases with an increase in the OOBA content. Finally, SMPU-OOBAm exhibits self-healing properties. The new mechanism can be ascribed to the heating-induced "bleeding" of OOBA in the liquid crystalline state and the subsequent re-crystallization upon cooling. This successful combination of liquid crystalline properties, triple-shape memory properties, and self-healing properties make the SMPU-OOBAm composites ideal for many promising applications in smart optical devices, smart electronic devices, and smart sensors.
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Affiliation(s)
- Jianfeng Ban
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Linjiang Zhu
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Shaojun Chen
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Yiping Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
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29
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Zhang Q, Hua W, Feng J. A Facile Strategy to Fabricate Multishape Memory Polymers with Controllable Mechanical Properties. Macromol Rapid Commun 2016; 37:1262-7. [PMID: 27254383 DOI: 10.1002/marc.201600217] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 05/06/2016] [Indexed: 11/11/2022]
Abstract
A facile blending strategy to fabricate multishape memory polymers (SMPs) with only one sort of phase transition material has been reported. In this work, olefin block copolymer (OBC) and styrene-b-(ethylene-co-butylene)-b-styrene (SEBS), which are both physically crosslinked, are blended with crystalline paraffin together. Due to the different interactions between polymer matrices and paraffin, the paraffin penetrated in OBC and SEBS exhibit separated melting transitions. It is quite interesting that merely paraffin distributed in OBC also shows two distinct melting transitions with enough OBC content in composites. Therefore, excellent quadruple shape memory effect can be achieved with a maximum of three melting transitions. Furthermore, through adjusting the polymer species and content, the mechanical and rheological properties can be conveniently tuned to a great extent. Compared with the reported strategies, this simple and controllable method sheds light on rapid design of multi-SMPs using inexpensive raw materials, which greatly paves the way for multi-SMPs from laboratory to factory.
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Affiliation(s)
- Qinglong Zhang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China
| | - Wenqiang Hua
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai, 201204, China
| | - Jiachun Feng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China
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30
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31
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Cavicchi KA. Shape Memory Polymers from Blends of Elastomers and Small Molecule Additives. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/masy.201500064] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kevin A. Cavicchi
- Department of Polymer Engineering; The University of Akron; 250 S. Forge St. Akron OH 44325-0301
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32
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Zhao Q, Qi HJ, Xie T. Recent progress in shape memory polymer: New behavior, enabling materials, and mechanistic understanding. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2015.04.001] [Citation(s) in RCA: 680] [Impact Index Per Article: 75.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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33
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Müller A, Michell R, Pérez R, Lorenzo A. Successive Self-nucleation and Annealing (SSA): Correct design of thermal protocol and applications. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.01.015] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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34
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Wang K, Zhu G, Wang Y, Ren F. Thermal and shape memory properties of cyanate/polybutadiene epoxy/polysebacic polyanhydride copolymer. J Appl Polym Sci 2015. [DOI: 10.1002/app.42045] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Kun Wang
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710129 China
| | - Guangming Zhu
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710129 China
| | - Yongkun Wang
- School of Mechano-Electronic Engineering; Xidian University; Xi'an 710071 China
| | - Fang Ren
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710129 China
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35
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Thakur S, Barua S, Karak N. Self-healable castor oil based tough smart hyperbranched polyurethane nanocomposite with antimicrobial attributes. RSC Adv 2015. [DOI: 10.1039/c4ra11730a] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Smart, tough hyperbranched polyurethane nanocomposite with excellent rapid and repeatable self-healing and antimicrobial attributes is fabricated.
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Affiliation(s)
- Suman Thakur
- Advanced Polymer and Nanomaterial Laboratory
- Department of Chemical Sciences (Centre for Polymer Science and Technology)
- Tezpur University
- Tezpur 784028
- India
| | - Shaswat Barua
- Advanced Polymer and Nanomaterial Laboratory
- Department of Chemical Sciences (Centre for Polymer Science and Technology)
- Tezpur University
- Tezpur 784028
- India
| | - Niranjan Karak
- Advanced Polymer and Nanomaterial Laboratory
- Department of Chemical Sciences (Centre for Polymer Science and Technology)
- Tezpur University
- Tezpur 784028
- India
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36
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Grillard F, Zakri C, Gaillard P, Korzhenko A, Néri W, Poulin P. How polymers lose memory with age. SOFT MATTER 2014; 10:8985-8991. [PMID: 25294363 DOI: 10.1039/c4sm01320d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Uniquely in the world of materials, polymers deformed at high temperature and subsequently quenched at low temperature, memorize the temperature at which they have been processed. Polymers can even memorize multiple temperatures. This temperature memory is reflected by a maximum of residual stress restored at the temperature of initial processing. It has been speculated that this capability could arise from the presence of dynamical heterogeneities in glassy domains of polymers. Processing the material at a given temperature would result in the selection of certain heterogeneities that participate in the storage of mechanical stress. Because dynamical heterogeneities are associated with particular relaxation times, the temperature memory of polymers should depend on the time, for example, the glass transition temperature depends on the frequency. The first experimental study of temporal effects on the temperature memory of polymers is presently reported. It is found that aging at high temperature shifts the maximum of residual stress towards greater temperatures. The corresponding loss of memory is explained by the relaxation of dynamical heterogeneities with short characteristic times. The present results clarify the origin of the temperature memory and provide insights into their efficient exploitation in applications.
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Affiliation(s)
- Fabienne Grillard
- Centre de Recherche Paul Pascal - CNRS, University of Bordeaux, 115 Avenue Schweitzer, 33600 Pessac, France.
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37
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Shape-memory behavior of bisphenol A-type cyanate ester/carboxyl-terminated liquid nitrile rubber coreacted system. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3321-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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38
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Wang Y, Zhu G, Cui X, Liu T, Liu Z, Wang K. Electroactive shape memory effect of radiation cross-linked SBS/LLDPE composites filled with carbon black. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3266-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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39
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Brostowitz NR, Weiss RA, Cavicchi KA. Facile Fabrication of a Shape Memory Polymer by Swelling Cross-Linked Natural Rubber with Stearic Acid. ACS Macro Lett 2014; 3:374-377. [PMID: 35590749 DOI: 10.1021/mz500131r] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A facile method was developed for fabrication of a robust shape memory polymer by swelling cross-linked natural rubber with stearic acid. Commercial rubber bands were swollen in molten stearic acid at 75 °C (35 wt % stearic acid loading). When cooled the crystallization of the stearic acid formed a percolated network of crystalline platelets. The microscopic crystals and the cross-linked rubber produce a temporary network and a permanent network, respectively. These two networks allow thermal shape memory cycling with deformation and recovery above the melting point of stearic acid and fixation below that point. Under manual, strain-controlled, tensile deformation the shape memory rubber bands exhibited fixity and recovery of 100% ± 10%.
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Affiliation(s)
- Nicole R. Brostowitz
- Department of Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - R. A. Weiss
- Department of Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Kevin A. Cavicchi
- Department of Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
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40
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Zhang L, Brostowitz NR, Cavicchi KA, Weiss RA. Perspective: Ionomer Research and Applications. MACROMOL REACT ENG 2013. [DOI: 10.1002/mren.201300181] [Citation(s) in RCA: 147] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Longhe Zhang
- Department of Polymer Engineering; The University of Akron; Akron OH 44325-0301
| | | | - Kevin A. Cavicchi
- Department of Polymer Engineering; The University of Akron; Akron OH 44325-0301
| | - R. A. Weiss
- Department of Polymer Engineering; The University of Akron; Akron OH 44325-0301
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41
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Wang L, Yang X, Chen H, Gong T, Li W, Yang G, Zhou S. Design of triple-shape memory polyurethane with photo-cross-linking of cinnamon groups. ACS APPLIED MATERIALS & INTERFACES 2013; 5:10520-10528. [PMID: 24080202 DOI: 10.1021/am402091m] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A triple-shape memory polyurethane (TSMPU) with poly(ε-caprolactone) -diols (PCL-diols) as the soft segments and diphenyl methane diisocyanate (MDI), N,N-bis (2-hydroxyethyl) cinnamamide (BHECA) as the hard segments was synthesized via simple photo-crosslinking of cinnamon groups irradiated under λ > 280 nm ultraviolet (UV) light. Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance ((1)H-NMR) and ultraviolet-visible absorption spectrum (UV-vis) confirmed the chemical structure of the material. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) results demonstrated that the photo-crosslinked polymer possessed two transition temperatures, one is due to the melting point of the soft segment PCL-diols, and the other is due to the glass transition temperature. All these contributed to the cross-linked structure of the hard segments and resulted in an excellent triple-shape memory effect. Alamar blue assay showed that the material has good non-cytotoxicity and can be potentially used in biomaterial devices.
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Affiliation(s)
- Lin Wang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, P.R. China
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42
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Bai Y, Jiang C, Wang Q, Wang T. Multi-Shape-Memory Property Study of Novel Poly(ε-Caprolactone)/Ethyl Cellulose Polymer Networks. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300389] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yongkang Bai
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 P. R. China
- Graduate University of Chinese Academy of Sciences; Beijing 100039 P. R. China
| | - Cheng Jiang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 P. R. China
- Graduate University of Chinese Academy of Sciences; Beijing 100039 P. R. China
| | - Qihua Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 P. R. China
| | - Tingmei Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 P. R. China
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43
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Huang CL, He MJ, Huo M, Du L, Zhan C, Fan CJ, Yang KK, Chin IJ, Wang YZ. A facile method to produce PBS-PEG/CNTs nanocomposites with controllable electro-induced shape memory effect. Polym Chem 2013. [DOI: 10.1039/c3py00461a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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