Synthesis and characterization of novel polyethylene-<em>g</em>-poly（lactic acid） graft copolymers

化学工业与工程

Chemcial Industry and Engineering

2022, Vol. 39

Issue (4) :22-29 DOI: 10.13353/j.issn.1004.9533.20210331

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Synthesis and characterization of novel polyethylene-g-poly（lactic acid） graft copolymers

CAI Hao¹, WANG Xing², CHEN Xiangjian¹, ZHANG Kunyu², PAN Li¹

1. School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China;
2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

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Abstract Herein, a series of novel polyethylene-g-poly(lactic acid) graft copolymers were synthesized by combination of coordination polymerization and ring-opening polymerization methods. Using ethylene, hexene and omega-undecylenyl alcohol random copolymer as main chain, we successfully introduced the bio-polyester PLA as the side grafting chain initiated by hydroxyl group. By optimizing the reaction conditions and monomer ratio, the main chain structure and side chain length of the graft copolymer can be adjusted accordingly. The DSC and TGA results showed that introduction of PLA grafts confined the crystallization of PE in the main chains, which was beneficial for the ductility and processability of the copolymers. More interestingly, the break elongation of the graft copolymers increased by the PLA grafting chains. The thermal stability of the graft copolymers was mainly controlled by the main chain polyolefin. The graft copolymers showed widely potential application in toughening PLA and compatibilizing agent for the polyester blends.

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	CAI Hao
	WANG Xing
	CHEN Xiangjian
	ZHANG Kunyu
	PAN Li

Keywords： graft copolymer synthesis polyethylene poly(lactic acid)

Received 2021-03-30;

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CAI Hao, WANG Xing, CHEN Xiangjian, ZHANG Kunyu, PAN Li.Synthesis and characterization of novel polyethylene-g-poly（lactic acid） graft copolymers[J] Chemcial Industry and Engineering, 2022,V39(4): 22-29

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