HYDROPHOBIC AND HYDROPHILIC INTERPENETRATING POLYMER NETWORKS (IPNS) COMPOSED OF POLYSTYRENE AND POLY(2-HYDROXYETHYL METHACRYLATE) .2. GRADIENT COMPOSITION IN THE IPNS SYNTHESIZED BY PHOTOPOLYMERIZATION

被引：26
|
作者：
MURAYAMA, S [1 ]
KURODA, S [1 ]
OSAWA, Z [1 ]
机构：
[1] GUNMA UNIV,FAC ENGN,DEPT CHEM,KIRYU,GUNMA 376,JAPAN
来源：
POLYMER | 1993年 / 34卷 / 18期
关键词：
INTERPENETRATING NETWORKS; PHOTOPOLYMERIZATION; GRADIENT COMPOSITION;
D O I：
10.1016/0032-3861(93)90516-D
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Sequential interpenetrating polymer networks (SIPNs) composed of poly(2-hydroxyethyl methacrylate) (PHEMA) and polystyrene (PS) were synthesized by photopolymerization at room temperature. A common solvent, N,N-dimethylformamide, was used to impregnate the styrene monomer into the PHEMA network. The IPNs had a microphase-separated structure of the order of 100 nm. It was found that the gradient composition in the surface region (to a depth of 0.1 mm) was obtained by polymerization inhibition with oxygen which had diffused from the surfaces of the swollen PHEMA gel. X-ray photoelectron spectroscopy measurements revealed that the PS component was enriched in the surface of the IPN. Thermodynamic effects on the composition of the outermost surface layer are discussed.
引用
收藏
页码：3893 / 3898
页数：6
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