1
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Simulation study on the co-polymerization of vinyl acetate between ethylene. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Cantamessa F, Damonte G, Monticelli O, Arrigo R, Fina A. Thermoreversible Cross-Linked Rubber Prepared via Melt Blending and Its Nanocomposites. ACS APPLIED POLYMER MATERIALS 2022; 4:4796-4807. [PMID: 35846782 PMCID: PMC9274616 DOI: 10.1021/acsapm.2c00416] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A covalent adaptable network based on the thermoreversible cross-linking of an ethylene-propylene rubber through Diels-Alder (DA) reaction was prepared for the first time through melt blending as an environmental-friendly alternative to traditional synthesis in organic solvents. Functionalization of the rubber with furan groups was performed in a melt blender and subsequently mixed with different amounts of bismaleimide in a microextruder. Cross-linking was confirmed by FT-IR spectroscopy and insolubility at room temperature, while its thermoreversible character was confirmed by a solubility test at 110 °C and by remolding via hot-pressing. Mechanical and thermomechanical properties of the obtained rubbers showed potential to compete with conventionally cross-linked elastomers, with stiffness in the range 1-1.7 MPa and strain at break in the range 200-500%, while allowing recycling via a simple melt processing step. Nanocomposites based on the thermoreversible rubber were prepared with reduced graphene oxide (rGO), showing significantly increasing stiffness up to ca. 8 MPa, ∼2-fold increased strength, and thermal conductivity up to ∼0.5 W/(m K). Results in this paper may open for industrially viable and sustainable applications of thermoreversible elastomers.
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Affiliation(s)
- Francesco Cantamessa
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, 15121 Alessandria, Italy
| | - Giacomo Damonte
- Dipartimento
di Chimica e Chimica Industriale, Università
di Genova, 16146 Genova, Italy
| | - Orietta Monticelli
- Dipartimento
di Chimica e Chimica Industriale, Università
di Genova, 16146 Genova, Italy
| | - Rossella Arrigo
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, 15121 Alessandria, Italy
| | - Alberto Fina
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, 15121 Alessandria, Italy
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3
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Hill SA, Steinfort R, Hartmann L. Progress, challenges and future directions of heterocycles as building blocks in iterative methodologies towards sequence-defined oligomers and polymers. Polym Chem 2021. [DOI: 10.1039/d1py00425e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Heterocyclic building blocks for iterative methodologies leading to sequence-defined oligomers and polymers are reviewed. Solid- as well as solution-phase methods, challenges surrounding these systems and potential future directions are presented.
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Affiliation(s)
- Stephen A. Hill
- Institute of Organic and Macromolecular Chemistry
- Heinrich Heine University Düsseldorf
- 40225 Düsseldorf
- Germany
| | - Robert Steinfort
- Institute of Organic and Macromolecular Chemistry
- Heinrich Heine University Düsseldorf
- 40225 Düsseldorf
- Germany
| | - Laura Hartmann
- Institute of Organic and Macromolecular Chemistry
- Heinrich Heine University Düsseldorf
- 40225 Düsseldorf
- Germany
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4
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Zdvizhkov AT, Smogorzevskis K, van Duin M, Picchioni F. Recyclability of Photoinduced Cross-Linked EPM Rubber with Anthracene-Grafted Groups: Problems and Their Solutions. ACS OMEGA 2020; 5:30454-30460. [PMID: 33283093 PMCID: PMC7711711 DOI: 10.1021/acsomega.0c04009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/30/2020] [Indexed: 06/12/2023]
Abstract
In this paper, we present the formation of reversible covalently cross-linked networks in ethylene propylene rubber with grafted anthracene groups (EPM-g-AN) based on the principles of photoinduced anthracene dimerization. First, an industrial-grade EPM rubber grafted with maleic anhydride functional groups (EPM-g-MA) was modified with 9-anthracenemethanol. By irradiating EPM-g-AN with UV light (365 nm), the anthracene moieties dimerize via [4 + 4]cycloaddition, forming a covalent network. The network cleavage proceeds at high temperatures (>170 °C), even if with considerable (chemical) degradation. Furthermore, one of the degradation routes has been identified by 1H NMR to occur via the ester bond cleavage releasing 9-anthracenemethanol. Nevertheless, the reversibility of cross-linking has been achieved by performing the reverse reaction in decalin. The UV-vis spectroscopy clearly shows that the de-cross-linking process in these conditions is due to the anthracene dimer cleavage. Although the recovery in mechanical properties upon recycling is yet to be optimized, the disclosed results pave the way toward the use of anthracene chemistry in thermally reversible networks with possible industrial perspective applications.
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Affiliation(s)
- Alexander T. Zdvizhkov
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747AG Groningen, the Netherlands
- Interbranch
Engineering Center “Composites of Russia” of Bauman
Moscow State University, Lefortovskaya emb, 1, Moscow 105005, Russian Federation
| | - Krists Smogorzevskis
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747AG Groningen, the Netherlands
| | - Martin van Duin
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747AG Groningen, the Netherlands
- ARLANXEO
Performance Elastomers, Innovation, P.O.
Box 1130, 6160 BC Geleen, The Netherlands
| | - Francesco Picchioni
- Department
of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747AG Groningen, the Netherlands
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5
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Enhancement of Thermal and Mechanical Properties of Bismaleimide Using a Graphene Oxide Modified by Epoxy Silane. MATERIALS 2020; 13:ma13173836. [PMID: 32878091 PMCID: PMC7504111 DOI: 10.3390/ma13173836] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 08/25/2020] [Accepted: 08/25/2020] [Indexed: 11/23/2022]
Abstract
A thermosetting resin system, based on bismaleimide (BMI), has been developed via copolymerization of 4,4′-diaminodiphenylsulfone with a newly synthesized graphene oxide modified using epoxy silane (ES-GO). The effect of ES-GO on the thermomechanical and mechanical properties of cured modified resin was studied. To evaluate the efficiency of the modified BMI systems, the composite samples using glass fiber cloth were molded and tested. Thermogravimetric analysis indicates that the cured sample systems displays a high char yield at lower concentrations of ES-GO (≤0.5 wt.%), suggesting an improved thermal stability. Using dynamic mechanical analysis, a marked increase in glass transition temperature (Tg) with increasing ES-GO content was observed. Analysis of mechanical properties reveals a possible effect of ES-GO as a toughener. The results also showed that the addition of 0.3 wt.% ES-GO maximizes the toughness of the modified resin systems, which was further confirmed by the result of analysis of fracture surfaces. At the same time, a molded composite with ES-GO showed improved mechanical properties and retention rate at 150 °C as compared to that made with neat resin.
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6
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Diels-Alder-based thermo-reversibly crosslinked polymers: Interplay of crosslinking density, network mobility, kinetics and stereoisomerism. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109882] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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7
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Coupling Dynamic Covalent Bonds and Ionic Crosslinking Network to Promote Shape Memory Properties of Ethylene-vinyl Acetate Copolymers. Polymers (Basel) 2020; 12:polym12040983. [PMID: 32340183 PMCID: PMC7240482 DOI: 10.3390/polym12040983] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/20/2020] [Accepted: 04/20/2020] [Indexed: 12/05/2022] Open
Abstract
Dynamic crosslinking networks based on Diels–Alder (DA) chemistry and ionic interactions were introduced to maleic anhydride modified ethylene-vinyl acetate copolymer (mEVA) via in situ melt processing. The dual dynamic crosslinking networks were characterized by temperature-dependent FTIR, and the effects on the shape memory properties of mEVA were evaluated with dynamic mechanical thermal analysis and cyclic tensile testing. A crosslinking density was achieved at 2.36 × 10−4 mol·cm−3 for DA-crosslinked mEVA; as a result, the stress at 100% extension was increased from 3.8 to 5.6 MPa, and tensile strength and elongation at break were kept as high as 30.3 MPa and 486%, respectively. The further introduction of 10 wt % zinc methacrylate increased the dynamic crosslinking density to 3.74 × 10−4 mol·cm−3 and the stress at 100% extension to 9.0 MPa, while providing a tensile strength of 28.4 MPa and strain at break of 308%. The combination of reversible DA covalent crosslinking and ionic network in mEVA enabled a fixing ratio of 76.4% and recovery ratio of 99.4%, exhibiting an enhanced shape memory performance, especially at higher temperatures. The enhanced shape memory and mechanical performance of the dual crosslinked mEVA showed promising reprocessing and recycling abilities of the end-of-life products in comparison to traditional peroxide initiated covalent crosslinked counterparts.
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8
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Pucci A. Smart and Modern Thermoplastic Polymer Materials. Polymers (Basel) 2018; 10:E1211. [PMID: 30961136 PMCID: PMC6290610 DOI: 10.3390/polym10111211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 10/29/2018] [Indexed: 12/03/2022] Open
Abstract
Smart and modern thermoplastic polymer materials are defined as novel thermoplastic materials that are capable of responding to external stimuli through a macroscopic output in which the energy of the stimulus is transduced appropriately as a function of external interference. [...].
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Affiliation(s)
- Andrea Pucci
- Department of Chemistry and Industrial Chemistry of the University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy.
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9
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Deng M, Guo F, Liao D, Hou Z, Li Y. Aluminium-catalyzed terpolymerization of furfuryl glycidyl ether with epichlorohydrin and ethylene oxide: synthesis of thermoreversible polyepichlorohydrin elastomers with furan/maleimide covalent crosslinks. Polym Chem 2018. [DOI: 10.1039/c7py01516j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel family of well-designed thermoreversible polyepichlorohydrin elastomers with furan/maleimide covalent crosslinks possessed excellent mechanical, self-healing ability and recyclability.
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Affiliation(s)
- Ming Deng
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
| | - Fang Guo
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
| | - Daohong Liao
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
| | - Yang Li
- State Key Laboratory of Fine Chemicals
- Department of Polymer Science and Engineering
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
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10
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Guo M, Zhang X, Zheng Y, Huang D. Synthesis of switchable intelligent molecularly imprinted polymers with selective adsorption of ethyl carbamate and their application in electrochemical sensor analysis. RSC Adv 2018; 8:25636-25644. [PMID: 35539791 PMCID: PMC9082584 DOI: 10.1039/c8ra04323j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 07/02/2018] [Indexed: 11/24/2022] Open
Abstract
A cyclodextrin aldehyde based molecularly imprinted polymer with thermally responsive Diels–Alder (DA) linkages of grafted furan-type dienes was polymerized. The synthesized DA-MIP has dienophile characteristics and the specific absorption of ethyl carbamate (EC) can be switched on or off simply by thermal adjustment to 130 °C and 60 °C, respectively. The imprinting factors (α) of the MIP and rDA-MIP to EC were 6.2 and 5.0, and the selection factors (β) were 5.2 and 4.0, respectively. The restoration of the molecular target ratio was 88%, as determined by absorption and desorption experiments. The thermal restoration ratio, determined by thermal cycling experiments, was 78%. A new electrochemical sensor was prepared using the DA-MIP and its responsiveness for detecting trace amounts of EC was investigated. The results indicate that the electrode response has good affinity and excellent specific recognition performance for template molecular chemicals. A cyclodextrin aldehyde based molecularly imprinted polymer with thermally responsive Diels–Alder (DA) linkages of grafted furan-type dienes was polymerized. The synthesized DA-MIP has dienophile characteristics and the specific adsorption of ethyl carbamate (EC) can be switched on or off simply by thermal adjustment. ![]()
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Affiliation(s)
- Ming Guo
- Department of Chemistry
- Zhejiang Agricultural & Forestry University
- Hangzhou
- China
- National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization
| | - Xinge Zhang
- Department of Chemistry
- Zhejiang Agricultural & Forestry University
- Hangzhou
- China
- National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization
| | - Yilu Zheng
- Department of Chemistry
- Zhejiang Agricultural & Forestry University
- Hangzhou
- China
- National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization
| | - Dinghai Huang
- Department of Polymer Material Science and Engineering
- Institute of Advanced Polymer Materials
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300350
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11
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Polgar LM, Hagting E, Raffa P, Mauri M, Simonutti R, Picchioni F, van Duin M. Effect of Rubber Polarity on Cluster Formation in Rubbers Cross-Linked with Diels-Alder Chemistry. Macromolecules 2017; 50:8955-8964. [PMID: 29213149 PMCID: PMC5707623 DOI: 10.1021/acs.macromol.7b01541] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 10/02/2017] [Indexed: 11/29/2022]
Abstract
![]()
Diels–Alder
chemistry has been used for the thermoreversible
cross-linking of furan-functionalized ethylene/propylene (EPM) and
ethylene/vinyl acetate (EVM) rubbers. Both furan-functionalized elastomers
were successfully cross-linked with bismaleimide to yield products
with a similar cross-link density. NMR relaxometry and SAXS measurements
both show that the apolar EPM-g-furan precursor contains
phase-separated polar clusters and that cross-linking with polar bismaleimide
occurs in these clusters. The heterogeneously cross-linked network
of EPM-g-furan contrasts with the homogeneous network
in the polar EVM-g-furan. The heterogeneous character
of the cross-links in EPM-g-furan results in a relatively
high Young’s modulus, whereas the more uniform cross-linking
in EVM-g-furan results in a higher tensile strength
and elongation at break.
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Affiliation(s)
- L M Polgar
- Department of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.,Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - E Hagting
- Department of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - P Raffa
- Department of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - M Mauri
- Department of Materials Science, , University of Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - R Simonutti
- Department of Materials Science, , University of Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - F Picchioni
- Department of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.,Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - M van Duin
- Department of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.,ARLANXEO Performance Elastomers, Keltan R&D, P.O. Box 1130, 6160 BC Geleen, The Netherlands
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