Shin Y C, Han D K, Kim Y H, Kim S C
Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, Taejon.
J Biomater Sci Polym Ed. 1994;6(2):195-210. doi: 10.1163/156856294x00310.
A series of interpenetrating polymer networks (IPNs) composed of hydrophilic polyurethane (PU) and hydrophobic polystyrene (PS) were prepared by the simultaneous polymerization method. The PU network was synthesized via the isocyanate-terminated PU prepolymer based on polyethylene glycol (PEG), a highly hydrophilic oligomer, and hexamethylene diisocyanate (HDI). The bulk and surface characteristics of these materials were analyzed by differential scanning calorimetry (DSC), tensile testing, scanning electron microscopy (SEM), attenuated total reflectance-Fourier transform infrared (ATR-FTIR), electron spectroscopy for chemical analysis (ESCA), and contact angle measurement. The PU/PS IPNs prepared in this study exhibited phase separated structures, which had dispersed PS domains in the continuous PU matrix, in both the bulk and surface showing two transition temperatures. The IPN containing 50 wt% of PS showed good mechanical properties. The enrichment of PU phase in the surface was revealed by SEM, ATR-FTIR, ESCA, and contact angle measurement.
通过同步聚合法制备了一系列由亲水性聚氨酯（PU）和疏水性聚苯乙烯（PS）组成的互穿聚合物网络（IPN）。PU网络是基于聚乙二醇（PEG，一种高度亲水性低聚物）和六亚甲基二异氰酸酯（HDI）通过异氰酸酯封端的PU预聚物合成的。通过差示扫描量热法（DSC）、拉伸测试、扫描电子显微镜（SEM）、衰减全反射傅里叶变换红外光谱（ATR-FTIR）、化学分析电子能谱（ESCA）和接触角测量对这些材料的本体和表面特性进行了分析。本研究制备的PU/PS IPN呈现出相分离结构，在本体和表面均有分散在连续PU基体中的PS微区，显示出两个转变温度。含有50 wt% PS的IPN表现出良好的力学性能。通过SEM、ATR-FTIR、ESCA和接触角测量揭示了表面PU相富集。
