Premium
Swelling behavior of thermosensitive N ‐isopropylacrylamide–ethyl N ‐acryloylglycine submicron‐sized copolymer gel particles
Author(s) -
Choi Hyun Seok,
Kim Jong Min,
Lee KeeJung,
Bae Young Chan
Publication year - 1998
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/(sici)1097-4628(19980725)69:4<799::aid-app19>3.0.co;2-k
Subject(s) - copolymer , swelling , materials science , polymer chemistry , poly(n isopropylacrylamide) , chemical engineering , polymerization , precipitation , composite material , polymer , physics , engineering , meteorology
Submicron‐sized N ‐isopropylacrylamide (NIPA)–ethyl N ‐acryloylglycine (ENAG) copolymer gel particles with various compositions were prepared by precipitation polymerization in water. Their swelling behaviors were determined by photon correlation spectroscopy (PCS). Our results showed that the volume transition temperature of copolymer gel particles decreased with increasing the mole ratio of ENAG. In model development, we modified the extended Flory–Huggins theory as a free energy of mixing term and employed the modified Flory–Rehner theory for the elastic contribution and compared the proposed model with our swelling data. The model predicted fairly well the swelling behaviors of copolymer gel particles. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 799–806, 1998