马来酸酐接枝改性稀土异戊橡胶的制备及性能
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摘要
采用溶液法,在稀土异戊橡胶(IR)聚合反应后,加入马来酸酐进行非均相溶液接枝改性,制备了马来酸酐接枝异戊橡胶(IR-g-MAH)。通过傅里叶变换红外光谱测试,证实改性后马来酸酐单体接枝在IR大分子链上。实验研究接枝率对IR-g-MAH生胶性能和硫化胶性能的影响,结果表明,与IR相比,IR-g-MAH具有较好的生胶塑性和较高的门尼黏度;马来酸酐接枝率小于1%时,硫化胶的定伸应力明显优于IR,接枝率为0.61%时最高,100%和300%定伸应力分别为3.2 MPa和13.4 MPa。
Maleated isoprene rubber(IR-g-MAH) was prepared by blending maleic anhydride(MA) to isoprene rubber(IR) compounds catalyzed by the rare earth catalysts after finish polymerization reaction. The measurement results of FT-IR confirm that the MA monomer is grafted onto the IR macromolecular chain. The effects of the grafting ratio of maleic anhydride on properties of the raw rubber and the vulcanized rubber were studied. The results show that IR-g-MAH has better green plasticity and higher Mooney viscosity. When the grafting ratio is less than 1%, the tensile modulus of IR-g-MAH vulcanizates is better than that of IR. When the grafting ratio is 0.61%, the tensile modulus of IR-g-MAH vulcanizates is the highest,and the 100% and 300% modulus are 3.2 MPa and 13.4 MPa respectively.
Maleated isoprene rubber(IR-g-MAH) was prepared by blending maleic anhydride(MA) to isoprene rubber(IR) compounds catalyzed by the rare earth catalysts after finish polymerization reaction. The measurement results of FT-IR confirm that the MA monomer is grafted onto the IR macromolecular chain. The effects of the grafting ratio of maleic anhydride on properties of the raw rubber and the vulcanized rubber were studied. The results show that IR-g-MAH has better green plasticity and higher Mooney viscosity. When the grafting ratio is less than 1%, the tensile modulus of IR-g-MAH vulcanizates is better than that of IR. When the grafting ratio is 0.61%, the tensile modulus of IR-g-MAH vulcanizates is the highest,and the 100% and 300% modulus are 3.2 MPa and 13.4 MPa respectively.
引文
[1] 刘洪涛,刘晓洪,周彦豪.橡胶化学接枝改性的研究进展[J]. 特种橡胶制品, 2005, 26(3): 58-61.Liu H T, Liu X H, Zhou Y H. Advances in research of chemical grafting modification of rubber[J]. Special Purpose Rubber Products, 2005, 26(3): 58-61.
[2] Zeng Z, Ren W, Xu C, et al. Maleated natural rubber prepared through mechanochemistry and its coupling effects on natural rubber/cotton fiber composites[J]. J. Polym. Res., 2010, 17: 213-219.
[3] Carone Jr E, Kopcak U, Goncalyes M C, et al. In situ comptibilizalion of polyamide 6/natural rubber blends with maleic anhydride[J]. Polymer, 2000, 41: 5929-5935.
[4] Nakason C, Kacsman A, Homsin S, et al. Rheological and curing behavior of reactive blending. I. Maleated natural rubber-cassava starch[J]. J. Appl. Polym. Sci., 2001, 81: 2803-2813.
[5] Tripathy A R, Morin J E, Williams D E, et a1. A novel approach to improving the mechanical properties in recycled vulcanized natural rubber and its mechanism[J]. Macromolecules, 2002, 35: 4616-4627.
[6] Naskar A K, De S K, Bhowmick A K. Thermoplastic elastomeric composition based on maleic anhydride-grafted ground rubber tire[J]. J. Appl. Polym. Sci., 2002, 84: 370-378.
[7] 董智贤, 周彦豪. 马来酸酐接枝天然橡胶的制备及应用研究[J].弹性体, 2010, 20(2): 10-15.Dong Z X, Zhou Y H. Preparation and application of maleic anhydride modified natural rubber[J]. China Elastomerics, 2010, 20(2): 10-15.
[8] 赵旭涛, 刘大华. 合成橡胶工业手册[M]. 北京:化学工业出版社, 2006: 538-539.
[9] 金仲, 罗筑, 向坤,等. 马来酸酐接枝天然橡胶的研究进展[J]. 弹性体, 2015, 25(1): 91-96.Jin Z, Luo Z, Xiang K, et al. Advances in research of chemical grafting modification of rubber[J]. China Elastomerics, 2015, 25(1): 91-96.
[10] 王同海, 张翠美, 赵季若,等. 氢化钠/马来酸酐体系改性天然橡胶的制备及性能[J]. 合成橡胶工业, 2017, 40(2): 94-98.Wang T H, Zhang C M, Zhao J R, et al. Preparation and properties of natural rubber modified with sodium hydride/maleic anhydride system[J]. China Synthetic Rubber Industry, 2017, 40(2): 94-98.
[11] 董智贤, 周彦豪, 谭丽霞,等. 马来酸酐溶液法接枝改性天然橡胶的研究[J]. 弹性体, 2004, 14(5): 1-5.Dong Z X, Zhou Y H, Tan L X, et al. Studies on the graft copolymerization of maleic anhydride on to natural rubber in solution[J]. China Elastomerics, 2004, 14(5): 1-5.
[12] Thames S F, Rahman A, Poole P W. The maleinization of low molecular weight guayule rubber[J]. J. Appl. Polym. Sci., 1993, 49: 1963-1969.
[13] 何丽霞. 马来酸酐接枝稀土异戊橡胶接枝率的测试方法[J]. 功能高分子学报, 2015, 28(1): 57-61.He L X. Test method of grafting ratio of maleic anhydride grafted rare earth isoprene rubber[J]. Journal of Functional Polymers, 2015, 25(1): 57-61.
[2] Zeng Z, Ren W, Xu C, et al. Maleated natural rubber prepared through mechanochemistry and its coupling effects on natural rubber/cotton fiber composites[J]. J. Polym. Res., 2010, 17: 213-219.
[3] Carone Jr E, Kopcak U, Goncalyes M C, et al. In situ comptibilizalion of polyamide 6/natural rubber blends with maleic anhydride[J]. Polymer, 2000, 41: 5929-5935.
[4] Nakason C, Kacsman A, Homsin S, et al. Rheological and curing behavior of reactive blending. I. Maleated natural rubber-cassava starch[J]. J. Appl. Polym. Sci., 2001, 81: 2803-2813.
[5] Tripathy A R, Morin J E, Williams D E, et a1. A novel approach to improving the mechanical properties in recycled vulcanized natural rubber and its mechanism[J]. Macromolecules, 2002, 35: 4616-4627.
[6] Naskar A K, De S K, Bhowmick A K. Thermoplastic elastomeric composition based on maleic anhydride-grafted ground rubber tire[J]. J. Appl. Polym. Sci., 2002, 84: 370-378.
[7] 董智贤, 周彦豪. 马来酸酐接枝天然橡胶的制备及应用研究[J].弹性体, 2010, 20(2): 10-15.Dong Z X, Zhou Y H. Preparation and application of maleic anhydride modified natural rubber[J]. China Elastomerics, 2010, 20(2): 10-15.
[8] 赵旭涛, 刘大华. 合成橡胶工业手册[M]. 北京:化学工业出版社, 2006: 538-539.
[9] 金仲, 罗筑, 向坤,等. 马来酸酐接枝天然橡胶的研究进展[J]. 弹性体, 2015, 25(1): 91-96.Jin Z, Luo Z, Xiang K, et al. Advances in research of chemical grafting modification of rubber[J]. China Elastomerics, 2015, 25(1): 91-96.
[10] 王同海, 张翠美, 赵季若,等. 氢化钠/马来酸酐体系改性天然橡胶的制备及性能[J]. 合成橡胶工业, 2017, 40(2): 94-98.Wang T H, Zhang C M, Zhao J R, et al. Preparation and properties of natural rubber modified with sodium hydride/maleic anhydride system[J]. China Synthetic Rubber Industry, 2017, 40(2): 94-98.
[11] 董智贤, 周彦豪, 谭丽霞,等. 马来酸酐溶液法接枝改性天然橡胶的研究[J]. 弹性体, 2004, 14(5): 1-5.Dong Z X, Zhou Y H, Tan L X, et al. Studies on the graft copolymerization of maleic anhydride on to natural rubber in solution[J]. China Elastomerics, 2004, 14(5): 1-5.
[12] Thames S F, Rahman A, Poole P W. The maleinization of low molecular weight guayule rubber[J]. J. Appl. Polym. Sci., 1993, 49: 1963-1969.
[13] 何丽霞. 马来酸酐接枝稀土异戊橡胶接枝率的测试方法[J]. 功能高分子学报, 2015, 28(1): 57-61.He L X. Test method of grafting ratio of maleic anhydride grafted rare earth isoprene rubber[J]. Journal of Functional Polymers, 2015, 25(1): 57-61.