1
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Ma Z, Zhang X, Zhang X, Ahmed N, Fan H, Wan J, Bittencourt C, Li BG. Synthesis of CO 2-Derived, Siloxane-Functionalized Poly(ether carbonate)s and Waterborne Polyurethanes. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06795] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Zhongzhu Ma
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xianwei Zhang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiaojing Zhang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Numan Ahmed
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hong Fan
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jintao Wan
- Engineering Research Center of Historical and Cultural Heritage Protection, Ministry of Education, Shaanxi Normal University, Xi’an 710062, China
| | - Carla Bittencourt
- Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons, Place du Parc 20, Mons B-7000, Belgium
| | - Bo-geng Li
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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2
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Zhang Y, Hu J. Isocyanate Modified GO Shape-Memory Polyurethane Composite. Polymers (Basel) 2020; 12:E118. [PMID: 31948033 PMCID: PMC7022938 DOI: 10.3390/polym12010118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/16/2019] [Accepted: 12/21/2019] [Indexed: 11/24/2022] Open
Abstract
Shape-memory composites have benefits for minimally invasive surgery, but their wider applications for bone repair are hindered by conflicts between the mechanical and memory performances, especially at load-bearing locations. In this study, we fabricated a graphene oxide shape-memory polyurethane composite through the chemical combination of graphene oxide and isocyanate, in order to realize satisfactory mechanical and shape-memory effects. As desired, a modulus of ~339 MPa and a shape recovery ratio of 98% were achieved, respectively, in the composite. In addition, finite element analysis demonstrated that, after being implanted in a defective bone through a minimally invasive treatment, where the highest stress was distributed at the implant-bone interface, this composite could offer a generated force during the recovery process. Furthermore, we also discuss the origins of the improved mechanical and memory properties of the composites, which arise from increased net-points and the stable molecular structure inside. Therefore, with its superior structure and properties, we envision that this shape-memory composite can provide new insights toward the practical application of shape-memory polymers and composites in the field of bone repair.
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Affiliation(s)
| | - Jinlian Hu
- Institute of Textiles and Clothing, Hong Kong Polytechnic University, Hung Hom, Hong Kong 999077, China;
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3
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Xie F, Zhang T, Bryant P, Kurusingal V, Colwell JM, Laycock B. Degradation and stabilization of polyurethane elastomers. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2018.12.003] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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4
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Das TK, Bhawal P, Ganguly S, Mondal S, Remanan S, Ghosh S, Das NC. Synthesis of hydroxyapatite nanorods and its use as a nanoreinforcement block for ethylene methacrylate copolymer matrix. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2565-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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5
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Santiago-Calvo M, Tirado-Mediavilla J, Ruiz-Herrero JL, Rodríguez-Pérez MÁ, Villafañe F. The effects of functional nanofillers on the reaction kinetics, microstructure, thermal and mechanical properties of water blown rigid polyurethane foams. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.07.029] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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6
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Tang X, Zhang Z, Zhang X, Huo W, Liu J, Yan S, Yang J. Design and formulation of polyurethane foam used for porous alumina ceramics. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1535-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Wu G, Xu X, He X, Yan Y. Preparation and Characterization of Graphene Oxide-Modified Sapium sebiferum Oil-Based Polyurethane Composites with Improved Thermal and Mechanical Properties. Polymers (Basel) 2018; 10:E133. [PMID: 30966169 PMCID: PMC6415030 DOI: 10.3390/polym10020133] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 01/28/2018] [Accepted: 01/29/2018] [Indexed: 11/17/2022] Open
Abstract
Bio-based polyurethane (PU) composites with superior thermal and mechanical properties have received wide attention. This is due to the recent rapid developments in the PU industry. In the work reported here, novel nano-composites with graphene oxide (GO)-modified Sapium sebiferum oil (SSO)-based PU has been synthesized via in situ polymerization. GO, prepared using the improved Hummers method from natural graphene (NG), and SSO-based polyol with a hydroxyl value of 211 mg KOH/g, prepared by lipase hydrolysis, were used as raw materials. The microstructures and properties of GO and the nano-composites were both characterized using Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and tensile tests. The results showed that GO with its nano-sheet structure possessed a significant number of oxygen-containing functional groups at the surface. The nano-composites containing 1 wt % GO in the PU matrix (PU1) exhibited excellent comprehensive properties. Compared with those for pure PU, the glass transition temperature (Tg) and initial decomposition temperature (IDT) of the PU1 were enhanced by 14.1 and 31.8 °C, respectively. In addition, the tensile strength and Young's modulus of the PU1 were also improved by 126% and 102%, respectively, compared to the pure PU. The significant improvement in both the thermal stability and mechanical properties for PU/GO composites was attributed to the homogeneous dispersion and good compatibility of GO with the PU matrix. The improvement in the properties upon the addition of GO may be attributable to the strong interfacial interaction between the reinforcing agent and the PU matrix.
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Affiliation(s)
- Guiying Wu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Xiaoling Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Xin He
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yunjun Yan
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
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8
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Leng W, Li J, Cai Z. Synthesis and Characterization of Cellulose Nanofibril-Reinforced Polyurethane Foam. Polymers (Basel) 2017; 9:E597. [PMID: 30965899 PMCID: PMC6418961 DOI: 10.3390/polym9110597] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 10/31/2017] [Accepted: 11/08/2017] [Indexed: 11/16/2022] Open
Abstract
In this study, traditional polyol was partially replaced with green, environmentally friendly cellulose nanofibrils (CNF). The effects of CNF on the performance of CNF-reinforced polyurethane foam nanocomposites were investigated using scanning electron microscopy, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) analysis, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and a compression test. The results showed that the introduction of CNF into the polyurethane matrix not only created stronger urethane bonding between the hydroxyl groups in the cellulose chain and isocyanate groups in polymethylene polyphenylisocyanate, but also developed an additional filler⁻matrix interaction between CNF and polyurethane. With the increase of the CNF replacement ratio, a higher glass transition temperature was obtained, and a higher amount of char residue was generated. In addition, an increase of up to 18-fold in compressive strength was achieved for CNF-PUF (polyurethane foam) nanocomposites with a 40% CNF replacement ratio. CNF has proved to be a promising substitute for traditional polyols in the preparation of polyurethane foams. This study provides an interesting method to synthesize highly green bio-oriented polyurethane foams.
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Affiliation(s)
- Weiqi Leng
- U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI 53726, USA.
| | - Jinghao Li
- Department of Biomaterials, International Center for Bamboo and Rattan, Beijing 10000, China.
| | - Zhiyong Cai
- U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI 53726, USA.
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9
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Bhawal P, Ganguly S, Das TK, Mondal S, Das N. Mechanically robust conductive carbon clusters confined ethylene methyl acrylate-based flexible composites for superior shielding effectiveness. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4092] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Poushali Bhawal
- Rubber Technology Center; Indian Institute of Technology Kharagpur; Kharagpur India
| | - Sayan Ganguly
- Rubber Technology Center; Indian Institute of Technology Kharagpur; Kharagpur India
| | - Tushar Kanti Das
- Rubber Technology Center; Indian Institute of Technology Kharagpur; Kharagpur India
| | - Subhadip Mondal
- Rubber Technology Center; Indian Institute of Technology Kharagpur; Kharagpur India
| | - N.C. Das
- Rubber Technology Center; Indian Institute of Technology Kharagpur; Kharagpur India
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10
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Pergal MV, Stefanović IS, Poręba R, Steinhart M, Jovančić P, Ostojić S, Špírková M. Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04913] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marija V. Pergal
- Institute
of Chemistry, Technology and Metallurgy, Center of Chemistry, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
| | - Ivan S. Stefanović
- Institute
of Chemistry, Technology and Metallurgy, Center of Chemistry, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
| | - Rafał Poręba
- Institute of Macromolecular Chemistry AS CR, v.v.i. IMC, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
| | - Miloš Steinhart
- Institute
of Applied Physics and Mathematics, Faculty of Chemical Technology, University of Pardubice, Studentska 95, 53210 Pardubice, Czech Republic
| | - Petar Jovančić
- Faculty
of Technology and Metallurgy, University of Belgrade, Karnegijeva
4, 11000 Belgrade, Serbia
| | - Sanja Ostojić
- Institute
of General and Physical Chemistry, University of Belgrade, Studentski
trg 12−16, 11000 Belgrade, Serbia
| | - Milena Špírková
- Institute of Macromolecular Chemistry AS CR, v.v.i. IMC, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
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11
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Fabrication, characterization and properties of waterborne polyurethane/3-aminopropyltriethoxysilane/multiwalled carbon nanotube nanocomposites via copolycondensation of hydroxyls. Polym Bull (Berl) 2016. [DOI: 10.1007/s00289-016-1859-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Tsao NH, Hall EAH. Enzyme-Degradable Hybrid Polymer/Silica Microbubbles as Ultrasound Contrast Agents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6534-6543. [PMID: 27245495 DOI: 10.1021/acs.langmuir.6b01075] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The fabrication of an enzyme-degradable polymer/silica hybrid microbubble is reported that produces an ultrasound contrast image. The polymer, a triethoxysilane end-capped polycaprolactone (SiPCL), is used to incorporate enzyme-degradable components into a silica microbubble synthesis, and to impart increased elasticity for enhanced acoustic responsiveness. Formulations of 75, 85, and 95 wt % SiPCL in the polymer feed produced quite similar ratios of SiPCL and silica in the final bubble but different surface properties. The data suggest that different regions of the microbubbles were SiPCL-rich: the inner layer next to the polystyrene template core and the outer surface layer, thereby creating a sandwiched silica-rich layer of the bubble shell. Overall, the thickness of the microbubble shell was dependent on the starting TEOS concentration and the reaction time. Despite the layered structure, the microbubble could be efficiently degraded by lipase enzyme, but was stable without enzyme. The ultrasound contrast showed a general trend of increase in image intensity with SiPCL feed ratio, although the 95 wt % SiPCL bubbles did not produce a contrast image, probably due to bubble collapse. At higher normalized peak negative acoustic pressure (mechanical index, MI), a nonlinear frequency response also emerges, characterized by the third harmonic at around 3f0, and increases with MI. The threshold MI transition from linear to nonlinear response increased with decrease in SiPCL.
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Affiliation(s)
- Nadia H Tsao
- Institute of Biotechnology, Department of Chemical Engineering and Biotechnology, University of Cambridge , Tennis Court Road, Cambridge CB2 1QT, United Kingdom
| | - Elizabeth A H Hall
- Institute of Biotechnology, Department of Chemical Engineering and Biotechnology, University of Cambridge , Tennis Court Road, Cambridge CB2 1QT, United Kingdom
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13
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Ti Y, Wen Q, Chen D. Characterization of the hydrogen bond in polyurethane/attapulgite nanocomposites. J Appl Polym Sci 2015. [DOI: 10.1002/app.43069] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Yang Ti
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering; Donghua University; Shanghai 201620 China
| | - Qiang Wen
- Synthetic Rubber Division of Sinopec Assets Management Corporation Baling Petrochemical
| | - Dajun Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering; Donghua University; Shanghai 201620 China
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14
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Ti Y, Chen D. Thermal Properties of Fe-octacarboxyl Acid Phthalocyanine/Polyurethane Blends. J MACROMOL SCI B 2014. [DOI: 10.1080/00222348.2014.943120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Lin J, Wu X, Zheng C, Zhang P, Li Q, Wang W, Yang Z. A novolac epoxy resin modified polyurethane acylates polymer grafted network with enhanced thermal and mechanical properties. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0435-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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17
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Shamini G, Yusoh K. Gas Permeability Properties of Thermoplastic Polyurethane Modified Clay Nanocomposites. ACTA ACUST UNITED AC 2014. [DOI: 10.7763/ijcea.2014.v5.352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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18
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Wu JH, Yen MS, Kuo MC, Tsai Y, Leu MT. Poly(ethylene terephthalate)/poly(ethylene glycol-co-1,3/1,4-cyclohexanedimethanol terephthalate)/clay nanocomposites: Mechanical properties, optical transparency, and barrier properties. J Appl Polym Sci 2013. [DOI: 10.1002/app.39869] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jyh-Horng Wu
- Material Application Center; Industrial Technology Research Institute; Tainan Taiwan
| | - Ming-Shien Yen
- Department of Materials Engineering; Kun Shan University; Tainan Taiwan
| | - M. C. Kuo
- Department of Materials Engineering; Kun Shan University; Tainan Taiwan
| | - Yuhsin Tsai
- School of Chinese Medicine; China Medical University; Taichung Taiwan
| | - Ming-Tsong Leu
- Material Application Center; Industrial Technology Research Institute; Tainan Taiwan
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19
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Fu SZ, Meng XH, Fan J, Yang LL, Lin S, Wen QL, Wang BQ, Chen LL, Wu JB, Chen Y. In vitroandin vivodegradation behavior of n-HA/PCL-Pluronic-PCL polyurethane composites. J Biomed Mater Res A 2013; 102:479-86. [PMID: 23533166 DOI: 10.1002/jbm.a.34717] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 03/05/2013] [Accepted: 03/13/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Shao-Zhi Fu
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Xiao-Hang Meng
- School of Clinical Medicine, Luzhou Medical College; Luzhou 646000 China
| | - Juan Fan
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Ling-Lin Yang
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Sheng Lin
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Qing-Lian Wen
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Bi-Qiong Wang
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Lan-Lan Chen
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Jing-Bo Wu
- Department of Oncology; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
| | - Yue Chen
- Department of Nuclear Medicine; The Affiliated Hospital of Luzhou Medical College; Luzhou 646000 China
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20
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Barick AK, Chang YW. Nanocomposites based on thermoplastic polyurethane, millable polyurethane and organoclay: Effect of matrix composition and dynamic vulcanization. J Appl Polym Sci 2013. [DOI: 10.1002/app.39670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Young-Wook Chang
- Polymer Nano Materials Laboratory, Department of Chemical Engineering, College of Engineering Sciences, Hanyang University; Ansan; Gyeonggi; 426-791; Republic of Korea
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21
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Heo Y, Im H, Yun S, Kim J. Low swelling poly(ester) urethane composite containing modified hollow glass microspheres for seawater-resistant encapsulant. Macromol Res 2013. [DOI: 10.1007/s13233-012-0192-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Abstract
Thermoplastic polyurethane (TPU) nanocomposites were prepared using polycaprolactonediol as the soft segment, 4,4’-diphenylmethane diisocyanate as the hard segment, 1,4-butanediol and palm oil polyol. Nanoclay with certain weight percent (wt%) was reinforced as filler to improve both mechanical and shape memory behavior of the nanocomposites. Palm oil polyol was introduced in order to provide hyperbranched structure for better dispersion of filler in the matrix as well as aiding the crosslinking process. The experimental results showed that the mechanical and shape memory behavior of clay reinforced polyurethane nanocomposites were influenced by clay weight percent in the polymer matrix. TPU with 3 wt% clay showed optimum values of mechanical properties while the shape memory behavior decreases with increasing clay content.
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Choi MC, Jung JY, Yeom HS, Chang YW. Mechanical, thermal, barrier, and rheological properties of poly(ether-block-amide) elastomer/organoclay nanocomposite prepared by melt blending. POLYM ENG SCI 2012. [DOI: 10.1002/pen.23348] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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24
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Jose AJ, Alagar M, Aprem AS. Thermal and Barrier Properties of Organoclay-filled Polysulfone Nanocomposites. INT J POLYM MATER PO 2012. [DOI: 10.1080/00914037.2011.593065] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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Maji PK, Bhowmick AK. Structure-property correlation of polyurethane nanocomposites: Influence of loading and nature of nanosilica and microstructure of hyperbranched polyol. J Appl Polym Sci 2012. [DOI: 10.1002/app.38063] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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High Performance Shape Memory Polyurethane Synthesized with High Molecular Weight Polyol as the Soft Segment. APPLIED SCIENCES-BASEL 2012. [DOI: 10.3390/app2020535] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Lee M, Kim W, Ku J, Kim YD, Min BH, Kim JH. Influence of nanoclays on electrical and morphological properties of thermoplastic polyurethane/multiwalled carbon nanotube/clay nanocomposites. J Appl Polym Sci 2012. [DOI: 10.1002/app.38014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Affiliation(s)
| | | | - Nicholas J. Turro
- c Chemistry Department, Columbia University, New York, NY 10027, USA;,
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30
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Zhao G, Wang T, Wang Q. Friction and Wear Behaviors of the Polydimethylsiloxane Bishydroxyalkyl-Terminated Modified Polyurethane Composites Filled with the Barium Sulfate in Dry Friction and Water Lubrication. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2011.562796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gai Zhao
- a State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Sciences , Lanzhou, China
- b Graduate University of Chinese Academy of Sciences , Beijing, China
| | - Tingmei Wang
- a State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Sciences , Lanzhou, China
| | - Qihua Wang
- a State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Sciences , Lanzhou, China
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31
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Effect of Nano Calcium Carbonate and Montmorillonite on Properties of Styrene–Butadiene–Styrene Copolymer Modified Asphalt. ACTA ACUST UNITED AC 2011. [DOI: 10.4028/www.scientific.net/amm.99-100.1035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Composite modified asphalts with nano calcium carbonate (nano CaCO3)/ SBS and nano montmorillonite (nano MMT)/SBS were prepared respectively by melt blending. Rolling thin film oven test (RTFOT) was carried out to study the aging properties. The results demonstrate that CaCO3/SBS and MMT/SBS homogeneously disperse in the base asphalt, which lead to an improvement in terms of toughness, strength, and thermal stability. Effects of the nano CaCO3 and nano MMT on the properties of SBS modified asphalt appear as a decreasing penetration, an increasing softening point, and a decreasing ductility. The anti-aging property of the nano MMT/SBS modified asphalt was better than that of the CaCO3/SBS modified asphalt and SBS modified asphalt.
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32
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Rueda L, Garcia I, Palomares T, Alonso-Varona A, Mondragon I, Corcuera M, Eceiza A. The role of reactive silicates on the structure/property relationships and cell response evaluation in polyurethane nanocomposites. J Biomed Mater Res A 2011; 97:480-9. [DOI: 10.1002/jbm.a.33075] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2011] [Revised: 02/03/2011] [Accepted: 02/03/2011] [Indexed: 11/10/2022]
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33
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Kotal M, Srivastava SK, Bhowmick AK, Chakraborty SK. Morphology and properties of stearate-intercalated layered double hydroxide nanoplatelet-reinforced thermoplastic polyurethane. POLYM INT 2011. [DOI: 10.1002/pi.3013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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34
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35
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Barick AK, Tripathy DK. Effect of organoclay on thermal and dynamic mechanical properties of novel thermoplastic polyurethane nanocomposites prepared by melt intercalation technique. POLYM ADVAN TECHNOL 2010. [DOI: 10.1002/pat.1507] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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David G, Simionescu BC, Ibanescu S, Vearba F. Effect of montmorillonite content in nanocomposites of segmented polyurethanes with poly(2-alkyl-2-oxazoline) sequences. HIGH PERFORM POLYM 2010. [DOI: 10.1177/0954008310378052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A series of polyurethane/montmorillonite (PU/MMT) nanocomposites, based on poly(tetramethyleneglycol) (PTMG), α,ω-dihydroxylated poly(2-alkyl-2-oxazoline) (PROZO), [4,4’-methylenebis-(phenyl isocyanate)] (MDI) or [4,4’-methylenebis-(cyclohexyl isocyanate)] (H12MDI) and montmorillonite (MMT), were investigated. The amount of added clay ranged from 3 up to 10% by weight. The influence of the MMT weight fraction in the polymer matrix on the morphology and thermal, dynamic mechanical and tensile properties was characterized by scanning electron microscopy, X-ray diffraction analysis, Fourier-transform infrared spectrophotometry, differential scanning callorimetry, thermogravimetric analysis and dynamic—mechanical analysis. The results of the investigations were used to rank the nanocomposites according to their properties in relation to the polyurethane matrix structure and MMT content. It was evidenced that the silicate layers were preferentially, but not exclusively, attracted to the hydrophilic polar PROZO domains, their level of dispersion being controlled through specific intermolecular interactions and the filler loading amount. Introducing clay in the polyurethane matrix resulted in an increase of both tensile strength and thermal stability. Their non-monotonic dependence on clay content was explained by considering that concomitant and contrasting effects develop as the clay amount increases: an improvement of the filler—matrix interactions and a reduction of the matrix labile physical crosslinking degree by hydrogen bonding coupled with a lower dispersion homogeneity. For high inorganic filler amount aggregated clay particles together with regions with mixture of exfoliated and intercalated morphologies were revealed.
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Affiliation(s)
- Geta David
- 'Gh. Asachi' Technical University, Bd. D. Mangeron 71A, Iasi 700050, Romania,
| | - Bogdan C. Simionescu
- 'Gh. Asachi' Technical University, Bd. D. Mangeron 71A, Iasi 700050, Romania, Also affiliated to 'Petru Poni' Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda, 41A, Iasi 700487, Romania
| | - Sorin Ibanescu
- 'Gh. Asachi' Technical University, Bd. D. Mangeron 71A, Iasi 700050, Romania, Also affiliated to 'Petru Poni' Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda, 41A, Iasi 700487, Romania
| | - Felicia Vearba
- 'Gh. Asachi' Technical University, Bd. D. Mangeron 71A, Iasi 700050, Romania
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Barick AK, Tripathy DK. Preparation and characterization of thermoplastic polyurethane/organoclay nanocomposites by melt intercalation technique: Effect of nanoclay on morphology, mechanical, thermal, and rheological properties. J Appl Polym Sci 2010. [DOI: 10.1002/app.31303] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bershtein VA, Gun'ko VM, Egorova LM, Guzenko NV, Pakhlov EM, Ryzhov VA, Zarko VI. Well-defined oxide core-polymer shell nanoparticles: interfacial interactions, peculiar dynamics, and transitions in polymer nanolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10968-10979. [PMID: 20415443 DOI: 10.1021/la101038z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Interfacial interactions, chain dynamics, and glass and melting transitions were studied in well-defined core-shell nanoparticles with amorphous silica or crystalline alumina cores and noncrystallizable poly(vinyl pyrrolidone) (PVP) or crystallizable poly(ethylene glycol) (PEG) shells. Varying particle composition caused regular changes in the shell thickness from 1 to 2 nm (monomolecular layer) up to 90 nm. Far- and mid-IR spectroscopy allowed us to register hydrogen bonding and, tentatively, Lewis/Brønsted (LB) interfacial interactions as well as changes in the dynamics and conformational state of the polymer chains as a function of the nanoshell thickness. Their most pronounced peculiarities were found for the monomolecular polymer layers. The LB interactions were stronger with the alumina substrate than silica. DSC analysis was performed, and the data obtained were in agreement with the spectroscopic data. Unlike the bulk polymer, the PVP monolayer was characterized with an extraordinarily large dynamic heterogeneity within the glass transition while broadening the transition range and varying the activation energy by an order of magnitude. The PEG monolayer adsorbed on silica was totally amorphous, whereas a highly crystalline one with the anomalously thin lamellae, down to 3 nm thick, was adsorbed on an alumina surface, presumably as a result of the quasi-heteroepitaxial crystallization process.
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Affiliation(s)
- V A Bershtein
- Materials Dynamics Laboratory, Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St.-Petersburg, Russia
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Rama MS, Swaminathan S. Influence of structure of organic modifiers and polyurethane on the clay dispersion in nanocomposites via in situ polymerization. J Appl Polym Sci 2010. [DOI: 10.1002/app.32500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang CH, Shieh YT, Nutt S. The effects of soft-segment molecular weight and organic modifier on properties of organic-modified MMT-PU nanocomposites. J Appl Polym Sci 2009. [DOI: 10.1002/app.30560] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Chen XD, Zhou NQ, Zhang H. In-situ polymerization and characterization of poly (ε -caprolactone) urethane/ SiO2nanocomposites. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/188/1/012025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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43
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Cervantes-Uc J, Espinosa JM, Cauich-Rodríguez J, Ávila-Ortega A, Vázquez-Torres H, Marcos-Fernández A, San Román J. TGA/FTIR studies of segmented aliphatic polyurethanes and their nanocomposites prepared with commercial montmorillonites. Polym Degrad Stab 2009. [DOI: 10.1016/j.polymdegradstab.2009.06.022] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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44
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Barick AK, Tripathy DK. Effect of organoclay on the morphology, mechanical, thermal, and rheological properties of organophilic montmorillonite nanoclay based thermoplastic polyurethane nanocomposites prepared by melt blending. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21556] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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Thirumal M, Khastgir D, Singha NK, Manjunath BS, Naik YP. Effect of a Nanoclay on the Mechanical, Thermal and Flame Retardant Properties of Rigid Polyurethane Foam. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2009. [DOI: 10.1080/10601320902939101] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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47
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Maji PK, Guchhait PK, Bhowmick AK. Effect of the microstructure of a hyperbranched polymer and nanoclay loading on the morphology and properties of novel polyurethane nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2009; 1:289-300. [PMID: 20353216 DOI: 10.1021/am800020k] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Novel polyurethane nanocomposites based on toluene diisocyanate, poly(propylene glycol), various hyperbranched polymers (HBPs), and layered silicate were synthesized with the aim of determining the effect of the layered silicate loading and the functionality of HBP on the structure and properties of polyurethane nanocomposites. The microstructure of the nanocomposites was investigated by X-ray diffraction analysis and high-resolution transmission electron microscopy. It was found that exfoliated morphology and good dispersion were obtained up to 8 phr clay loading for all of the nanocomposites. approximately 100% increment in tensile strength, approximately 2-fold increase in the lap shear strength, approximately 200% increment in the peel strength, and 120% increment in the storage modulus along with a dramatic improvement in thermal stability were observed with the addition of 8 phr clay, over the pristine polyurethane. The higher the level of functionality of the HBP, the higher is the property enhancement. These properties were correlated with the state of dispersion of the clay platelets in the polyurethane matrix, the structure of the matrix, and clay-polymer interaction.
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Affiliation(s)
- Pradip K Maji
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur, India
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48
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Bershtein V, Gun'ko V, Egorova L, Guzenko N, Pakhlov E, Ryzhov V, Zarko V. Well-defined silica core–poly(vinyl pyrrolidone) shell nanoparticles: Interactions and multi-modal glass transition dynamics at interfaces. POLYMER 2009. [DOI: 10.1016/j.polymer.2008.12.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Karabanova LV, Bershtein VA, Sukhanova TE, Yakushev PN, Egorova LM, Lutsyk ED, Svyatyna AV, Vylegzhanina ME. 3D diamond‐containing nanocomposites based on hybrid polyurethane–poly(2‐hydroxyethyl methacrylate) semi‐IPNs: Composition‐nanostructure‐segmental dynamics‐elastic properties relationships. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/polb.21506] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rimez B, Rahier H, Van Assche G, Artoos T, Van Mele B. The thermal degradation of poly(vinyl acetate) and poly(ethylene-co-vinyl acetate), Part II: Modelling the degradation kinetics. Polym Degrad Stab 2008. [DOI: 10.1016/j.polymdegradstab.2008.01.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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