Toughness improvement of poly(lactic acid) with poly(vinyl propionate)-grafted natural rubber

被引：3
作者：
Jaratrotkamjorn, Ruedee [1 ]
Tanrattanakul, Varaporn [2 ]
机构：
[1] Prince Songkla Univ, Int Coll, Rubber Engn & Technol Program, Hat Yai 90110, Songkhla, Thailand
[2] Prince Songkla Univ, Div Phys Sci, Hat Yai, Thailand
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2021年 / 138卷 / 38期
关键词：
biopolymers and renewable polymers; emulsion polymerization; grafting; mechanical properties; rubber; MECHANICAL-PROPERTIES; THERMAL-PROPERTIES; COMPATIBILIZATION; POLY(L-LACTIDE); POLYLACTIDE; STRATEGIES; BEHAVIOR; BLENDS;
D O I：
10.1002/app.50980
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Natural rubber (NR) grafted with poly(vinyl propionate) (NR-g-PVP) was prepared by emulsion polymerization. The monomer content was set at 5, 10, 20, and 30 wt%. The chemical structure of NR-g-PVP was confirmed by H-1-NMR and FTIR techniques. The grafting parameters of purified NR-g-PVP were evaluated. Binary (PLA/NR and PLA/NR-g-PVP) and ternary (PLA/NR/NR-g-PVP) blends were prepared by melt blending using a twin-screw extruder. The percentage of grafted PVP on NR affected morphology, thermal and mechanical properties of the blends. In binary blends, 5% grafting showed the greatest improvement of toughness and ductility with PLA, whereas there was no improvement in the mechanical properties of PLA/NR blend from using NR-g-PVP as a compatibilizer. The mechanical properties of the blends are related to mutual compatibility of the components. Good interfacial adhesion and proper particle size of NR were the key factors contributing to mechanical properties.
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页数：13
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