Thermal characteristics of poly(vinyl alcohol) and poly(vinylpyrrolidone) IPNs

被引:58
作者
Kim, SJ
Park, SJ
Kim, IY
Lee, YH
Kim, SI [1 ]
机构
[1] Hanyang Univ, Dept Biomed Engn, Seoul 133791, South Korea
[2] Halla Univ, Sch Informat & Commun Engn, Wonju, South Korea
关键词
thermal properties; poly(vinyl alcohol); poly(vinyl pyrrolidone); IPN;
D O I
10.1002/app.11096
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Interpenetrating polymer network (IPN) hydrogels based on poly(vinyl alcohol) (PVA) and 1-vinyl-2-pyrrolidone (VP) were prepared by radical polymerization using 2,2-dimethyl-2-phenylacetophenone (DMPAP) and methylene bisacrylicamide (MBAAm) as initiator and crosslinker, respectively. The thermal characterization of the IPNs was investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dielectric analysis (DEA). Depressions of the melting temperatures of PVA segments in IPNs were observed with increasing VP content via the DSC. The DEA was employed to ascertain the glass transition temperature (T-g) of IPNs. From the result of DEA, IPNs exhibited two T(g)s indicating the presence of phase separation in the IPN. The thermal decomposition of IPNs was investigated using TGA and appeared at near 270degreesC, (C) 2002 Wiley Periodicals, Inc.
引用
收藏
页码:1844 / 1847
页数:4
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