Guoqin Liu,^1,* Ziran Liu,² Wenjun Zou,¹ Zhengxin Li,1 Jin Peng,¹ Wenxi Cheng¹ and Sankui Xu¹

¹ College of Material Science and Engineering, Henan University of Technology, Zhengzhou, 450007, China.
² School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou, 450007, China
* Corresponding author: E-mail: guoqin_liu@haut.edu.cn

Abstract
Based on hydrogen bonding interactions, poly(methyl methacrylate-co-N-vinyl-2-pyrrolidone) (P(MMA-co-VP)) networks and linear poly(ethylene glycol) (PEG) can form semi-interpenetrating polymer networks (semi-IPNs). The morphology and thermal behaviors of the P(MMA-co-VP)/PEG semi-IPNs was studied by FTIR, XRD, TEM, and DSC. In P(MMA-co-VP)/PEG semi-IPNs, when the molecular weight of PEG is no more than 1000 in the semi-IPNs, P(MMA-co-VP)/PEG semi-IPNs are a homogeneous amorphous phase; similarly, when the proportion of PEG is less than 50 wt%, P(MMA-co-VP)/PEG semi-IPNs are fully amorphous; otherwise, P(MMA-co-VP)/PEG semi-IPNs are a mixture of PEG in the crystalline state with P(MMA-co-VP) networks in the amorphous state.

Keywords: Hydrogen bonding, semi-interpenetrating polymer networks, poly(methyl methacrylate-co-N-vinyl-2- pyrrolidone), poly(ethylene glycol)