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Poly(ethylene glycol)‐ block ‐poly(butyl acrylate). II. Characterization and properties
Author(s) -
Lang Meidong,
Zhang Guo,
Chen Xinfang,
Feng Na,
Li Shuhua
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(19981121)70:8<1427::aid-app1>3.0.co;2-c
Subject(s) - crystallinity , differential scanning calorimetry , polymer chemistry , materials science , gel permeation chromatography , ethylene glycol , copolymer , crystallization , ethylene oxide , nucleation , chemical engineering , butyl acrylate , acrylate , adipate , chemistry , organic chemistry , polymer , composite material , physics , engineering , thermodynamics
Poly(ethylene glycol)‐ block ‐poly(butyl acrylate) synthesized by radical polymerization in a one‐step procedure were characterized by gel permeation chromatography, infrared, 1 H‐NMR spectroscopy, and differential scanning calorimetry (DSC). The crystalline property, emulsifying property, and phase transfer catalytic effect in the Williamson reaction were studied. It was found that the crystallinity of the copolymer increased with an increase in both the content and molecular weight of poly(ethylene oxide) (PEO) sequences. DSC curves showed two distinct crystallization temperature due to the heterogeneous nucleation and homogeneous nucleation crystallization. The casting solvent significantly affected the morphology and crystallinity of the solvent cast films. Both the emulsifying volume and the phase transfer catalytic efficiency in the Williamson reaction increased with the amount and PEO content of the block copolymers used, but decreased with an increase in the molecular weight of PEO sequences. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 1427–1436, 1998