菠萝叶纤维与甲基丙烯酸甲酯接枝聚合条件优化及其共聚物性能表征

doi:10.3969/j.issn.1673-5854.2017.06.003

Abstract

Abstract: Graft polymerizations of methyl methacrylate(MMA) onto pineapple leaf fibers by using ammonium cerium nitrate as initiator and water as medium were carried out in heterogeneous systems. The obtained optimal process conditions for the graft polymerization were ammonium cerium nitrate concentration of 0.006 mol/L, hydrogen ion of 0.06 mol/L, MMA of 0.4 mol/L and reaction for 3 h at 50 ℃. Under these conditions, the grafting rate of copolymer was 185%. The structures and physicochemical properties of pineapple leaf fibers before and after graft polymerization were characterized by SEM, FT-IR, TG and fiber strength analyzer, respectively. The results indicated that the graft polymerization changed the original arrangement of fibrous molecules, destroyed parts of crystalline areas of fibers, and decreased the tensile strength; and the grafted pineapple leaf fibers were loose and more soft, whereas the heat resistance improved. Meanwhile, the higher grafting ratio of pineapple leaf fibers was, the lower hygroscopicity as well as higher acid and alkali resistance it was.

Key words: pineapple leaf fiber, methyl methacrylate(MMA), graft polymerization, grafting rate

CLC Number:

TQ35

XIONG Zengheng, LIN Yan, LIN Zhaohua, HE Zhongping, ZHANG Yucang. Optimization of Graft Polymerization Conditions of Methyl Methacrylate onto Pineapple Leaf Fibers and Characterization of Copolymers[J]. bce, 2017, 51(6): 11-18.

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Optimization of Graft Polymerization Conditions of Methyl Methacrylate onto Pineapple Leaf Fibers and Characterization of Copolymers

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