Morphology and Thermal Behaviour of Poly (methyl methacrylate-co –N-vinyl-2-pyrrolidone) / Poly (ethylene glycol) Semi-interpenetrating Polymer Networks Based on Hydrogen Bonding Interaction

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.