Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate
In this study, we investigated the improvement of the thermal and mechanical properties of Vietnam deproteinized natural rubber (DPNR) via graft copolymerization of methyl methacrylate (MMA). The graft copolymerization was achieved successfully in latex stage using tert-butyl hydroperoxide (TBHPO) a...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2020/9037827 |
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| author | Thi Nhan Nguyen Hieu Nguyen Duy Dung Tran Anh Thuong Nghiem Thi Thu Ha Nguyen Nam Nguyen Van Tung Tran Quang Tung Nguyen Huy Thuy Tran Thi |
| author_facet | Thi Nhan Nguyen Hieu Nguyen Duy Dung Tran Anh Thuong Nghiem Thi Thu Ha Nguyen Nam Nguyen Van Tung Tran Quang Tung Nguyen Huy Thuy Tran Thi |
| author_sort | Thi Nhan Nguyen |
| collection | DOAJ |
| description | In this study, we investigated the improvement of the thermal and mechanical properties of Vietnam deproteinized natural rubber (DPNR) via graft copolymerization of methyl methacrylate (MMA). The graft copolymerization was achieved successfully in latex stage using tert-butyl hydroperoxide (TBHPO) and tetra-ethylenepentamine (TEPA) as radical initiators at 30°C. By grafting with various MMA feeds and initiator concentration of 6.6×10−5 mol/g-rubber, the highest grafting efficiency and conversion were achieved at MMA of 15 wt.% per kg of rubber, 68% and 90%, respectively. The structure of grafted copolymers was characterized by 1H NMR, FTIR-ATR, and GPC, and thermal properties were investigated through DSC and TGA measurements. These showed that graft copolymers were more stable and rigid than DPNR. Storage modulus (G′) of graft copolymer was found to double that of DPNR, which contributed to the formation of graft copolymer. After sulfur vulcanization, the mechanical properties of DPNR-graft-PMMA, such as tensile strength, tear strength, and hardness, were improved significantly. Curing behaviors of the graft copolymers were found to be remarkably better than virgin DPNR. |
| format | Article |
| id | doaj-art-31368097be47472fb198c3e018f8a307 |
| institution | OA Journals |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-31368097be47472fb198c3e018f8a3072025-08-20T02:38:55ZengWileyInternational Journal of Polymer Science1687-94221687-94302020-01-01202010.1155/2020/90378279037827Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl MethacrylateThi Nhan Nguyen0Hieu Nguyen Duy1Dung Tran Anh2Thuong Nghiem Thi3Thu Ha Nguyen4Nam Nguyen Van5Tung Tran Quang6Tung Nguyen Huy7Thuy Tran Thi8School of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, VietnamIn this study, we investigated the improvement of the thermal and mechanical properties of Vietnam deproteinized natural rubber (DPNR) via graft copolymerization of methyl methacrylate (MMA). The graft copolymerization was achieved successfully in latex stage using tert-butyl hydroperoxide (TBHPO) and tetra-ethylenepentamine (TEPA) as radical initiators at 30°C. By grafting with various MMA feeds and initiator concentration of 6.6×10−5 mol/g-rubber, the highest grafting efficiency and conversion were achieved at MMA of 15 wt.% per kg of rubber, 68% and 90%, respectively. The structure of grafted copolymers was characterized by 1H NMR, FTIR-ATR, and GPC, and thermal properties were investigated through DSC and TGA measurements. These showed that graft copolymers were more stable and rigid than DPNR. Storage modulus (G′) of graft copolymer was found to double that of DPNR, which contributed to the formation of graft copolymer. After sulfur vulcanization, the mechanical properties of DPNR-graft-PMMA, such as tensile strength, tear strength, and hardness, were improved significantly. Curing behaviors of the graft copolymers were found to be remarkably better than virgin DPNR.http://dx.doi.org/10.1155/2020/9037827 |
| spellingShingle | Thi Nhan Nguyen Hieu Nguyen Duy Dung Tran Anh Thuong Nghiem Thi Thu Ha Nguyen Nam Nguyen Van Tung Tran Quang Tung Nguyen Huy Thuy Tran Thi Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate International Journal of Polymer Science |
| title | Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate |
| title_full | Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate |
| title_fullStr | Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate |
| title_full_unstemmed | Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate |
| title_short | Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate |
| title_sort | improvement of thermal and mechanical properties of vietnam deproteinized natural rubber via graft copolymerization with methyl methacrylate |
| url | http://dx.doi.org/10.1155/2020/9037827 |
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