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New chitin‐based polymer hybrids, 3 . Miscibility of chitin‐ graft ‐poly(2‐ethyl‐2‐oxazoline) with poly(vinyl alcohol)
Author(s) -
Aoi Keigo,
Takasu Akinori,
Tsuchiya Maki,
Okada Masahiko
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19981201)199:12<2805::aid-macp2805>3.0.co;2-6
Subject(s) - miscibility , polymer chemistry , copolymer , vinyl alcohol , thermal stability , materials science , polymer , oxazoline , glass transition , chemistry , organic chemistry , composite material , catalysis
Abstract The miscibility of blends of 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 of compositions for both blend systems, which indicated that PVA is miscible with both the graft copolymer 1 and PEtOZO. The T g of PVA is also shifted to lower temperature upon blending with the graft copolymer 1 . IR analysis revealed the existence of specific interactions via hydrogen bonding between the hydroxyl groups in PVA and the carbonyl groups in the poly(2‐ethyl‐2‐oxazoline) side chain of graft copolymer 1 . The results show that the interaction of graft copolymer 1 with PVA is increased by introduction of longer poly(2‐ethyl‐2‐oxazoline) side chains. Thermal decomposition (TG) measurements supported the compatibility of PVA with graft copolymer 1 and with PEtOZO, and showed that the thermal stability of PVA is improved upon blending with 1 or PEtOZO.