Multiple actions of poly(ethylene octene) grafted with glycidyl methacrylate on the performance of poly(lactic acid)

Xianzeng Wang; Jianguo Mi; Jie Wang; Hongfu Zhou; Xiangdong Wang

doi:10.1039/c8ra07510g

Multiple actions of poly(ethylene octene) grafted with glycidyl methacrylate on the performance of poly(lactic acid)

RSC Adv. 2018 Oct 8;8(60):34418-34427. doi: 10.1039/c8ra07510g. eCollection 2018 Oct 4.

Authors

Xianzeng Wang^{1

2}, Jianguo Mi³, Jie Wang⁴, Hongfu Zhou^{1

2}, Xiangdong Wang^{1

2}

Affiliations

¹ School of Materials Science and Mechanical Engineering, Beijing Technology and Business University Beijing 100048 People's Republic of China zhouhongfu@th.btbu.edu.cn wangxid@th.btbu.edu.cn +86 10 68983954 +86 10 68985362.
² Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics Beijing 100048 People's Republic of China.
³ State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology Beijing 100029 People's Republic of China.
⁴ Applied Chemistry Department, Yuncheng University Yuncheng 044000 People's Republic of China.

Abstract

Poly(ethylene octene) grafted with glycidyl methacrylate (POE-g-GMA) was employed to improve the rheological and thermal properties, toughness, and foaming behaviors of poly(lactic acid) (PLA) through a chain extension effect. The dynamic rheological properties of PLA were improved significantly with increasing content of POE-g-GMA, due to the chain extension reaction between PLA and POE-g-GMA. As the content of POE-g-GMA increased, the cold crystallization temperature of PLA decreased by more than 10 °C and the crystallinity of PLA increased slightly from 1.2% to 4.7%, respectively. The impact strength of PLA with a POE-g-GMA content of 10 wt% increased by more than 4 times, compared with that of pure PLA. A sea-island structure could be observed in the PLA/POE-g-GMA blends and the distribution of POE-g-GMA was uniform. PLA foams with various POE-g-GMA contents were prepared in a stainless-steel autoclave using supercritical CO₂ as a physical blowing agent. The cellular morphology of PLA foam was obviously improved when the concentration of POE-g-GMA increased from 5 wt% to 10 wt%.