New chitin-based polymer hybrids, 3. Miscibility of chitin-graft-poly(2-ethyl-2-oxazoline) with poly(vinyl alcohol)

摘要: The miscibility of blends poly(vinyl alcohol) (PVA) with chitin-graft-poly(2-ethyl-2-oxazoline) (1) and poly(2-ethyl-2-oxazoline) homopolymer (PEtOZO) was investigated. Calorimetric results showed a single glass transition temperature (T g ) in the entire range compositions for both blend systems, which indicated that PVA is miscible graft copolymer 1 PEtOZO. T also shifted to lower upon blending 1. IR analysis revealed existence specific interactions via hydrogen bonding between hydroxyl groups carbonyl side chain show interaction increased by introduction longer chains. Thermal decomposition (TG) measurements supported compatibility PEtOZO, thermal stability improved or