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Synthesis of thermosensitive polymers containing sugar branches
Author(s) -
Raku Takao,
Tokiwa Yutaka
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20010418)80:3<384::aid-app1110>3.0.co;2-d
Subject(s) - copolymer , monomer , polymer chemistry , differential scanning calorimetry , acrylamide , polymerization , materials science , polymer , glass transition , radical polymerization , chemical engineering , composite material , thermodynamics , physics , engineering
Copolymers of 6‐ O ‐vinyladipoyl‐ D ‐glucose (VAG) and N ‐isopropyl acrylamide (NIPAm) were synthesized by radical polymerization. The number‐average molecular weights of the copolymers were 3 × 10 4 ≈ 6 × 10 4 . The observed segment composition of copolymers at the feed molar ratio (VAG 25/NIPAm 75) was VAG 10/NIPAm 90. The polymerization rate of the VAG monomer was slower than that of the NIPAm monomer. The lower critical‐solution temperature of copolymers measured with a light‐scattering photometer and a differential scanning calorimeter increased with increasing VAG segment composition. The increase in transition temperature was accompanied by a decrease in transition heat. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 384–387, 2001