SPS及其镧离聚物对PS/PBMA共混体系相容性的影响

通过运用溶液成膜共混法制备了系列聚苯乙烯／聚人烯酸丁酯（ＰＳ／ＰＢＭＡ）共混物。借助差示扫描量热法（ＤＳＣ）、傅里叶变换红外光谱（ＦＴＩＲ）、扫描电子显微镜９ＳＥＭ）研究了磺化磺苯乙烯（ＳＰＳ）及其离物对共体系相容性的影响。共混物中ＳＰＳ磺化度越高，ＰＢＭＡ相的下班伦为温度向高温方向移动越明显 。ＳＰＳ镧离聚物（ＳＰＳ１．８－Ｌａ）为增容剂时，ＤＣＳ结果显示共混物２相Ｔｇ靠扰；ＳＥＭ归咎显示２相分

Effect of SPS and SPS - La on Compatibility of PS/PBMA Blends

Ionomers usually exert a positive effect on the compatibility of polymer blends to a certain extent through the interaction of ion - ion or ion - dipole. A series of polystyrene/poly (n - butyl methacrylate) (PS/PBMA) blends were prepared by solution - casting method in this paper. The effects of sulfonated polystyrene (SPS) and its ionomer on the compatibility of the PS/PBMA blends was studied by DSC, SEM and FTIR. It was verified that the PS and PBM A were mutually incompatible, however, as the sulfonation degree of SPS in the blend increased, the compatibility of the blend was obviously improved. In the case of using SPS 1.8 - La as compatibilizer in the PS/ PBMA blend, the glass transition temperatures of the two phases in the blend mutually shifted toward each other, as showed in the DSC spectrum. The homogeneous dispersions of the two phases in the blend were also demonstrated in the micrographs taken by SEM. The vibration absorption peak of the C-O bond of PBMA at 1 158 cm-1 apparently moved toward low frequency region in the FTIR spectra.