共单体
材料科学
共聚物
甲基丙烯酸缩水甘油酯
嫁接
高分子化学
复合材料
极限抗拉强度
热稳定性
聚丙烯
化学工程
聚合物
工程类
作者
Lixin Song,Qian Zhang,Yongsheng Hao,Yongchao Li,Weihan Chi,Fei Cong,Ying Shi,Li Zhi Liu
出处
期刊:Polymers
[MDPI AG]
日期:2022-09-29
卷期号:14 (19): 4088-4088
被引量:6
标识
DOI:10.3390/polym14194088
摘要
The melt-free radical grafting of glycidyl methacrylate (GMA) onto poly (lactic acid) (PLA) with styrene (St), α-methylstyrene (AMS), and epoxy resin (EP) as comonomers in a twin-screw extruder was used to prepare PLA-g-GMA graft copolymers. The prepared graft copolymers were then used as compatibilizers to prepare PLA/PPC/PLA-g-GMA blends by melt blending with PLA and polypropylene carbonate (PPC), respectively. The effects of different comonomers in the PLA-g-GMA graft copolymers on the thermal, rheological, optical, and mechanical properties and microstructure of the blends were studied. It was found that the grafting degree of PLA-g-GMA graft copolymers was increased to varying degrees after the introduction of comonomers in the PLA-g-GMA grafting reaction system. When St was used as the comonomer, the grafting degree of the PLA-g-GMA graft copolymer increased most significantly, from 0.8 to 1.6 phr. St as a comonomer also most improved the compatibility between PLA and PPC, and the haze of the blends was reduced while maintaining high transmittance. In addition, the PLA-g-GMA graft copolymer with the introduction of St as a comonomer significantly improved the impact toughness of the blends, while the thermal stability and tensile strength of the blends remained largely unchanged.
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