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嵌段高聚物、均聚物共混体系相容性是近年来研究的热点。本工作以光学显微镜、DSC、FT-IR为手段,研究了三嵌段高聚物苯乙烯-丁二烯-苯乙烯(SBS);SBS-48、SBS-30,SBS-28与聚乙烯基甲基醚共混体系的相容性。DSC结果表明,随SBS中PS含量的升高,体系相容性变好,PS段分子量增大,也有助于体系相容。FT-IR结果表明PVME中COCH_3在1100cm~(-1)附近呈现的双峰的相对强度对体系的相容性十分敏感,而由于苯环C—H振动产生的698cm~(-1)峰位却不象PS/PVME体系那样随相容性的改变而有显著的改变。总而言之,嵌段高聚物SBS/均聚物PVME共混体系中,体系的相容性依赖于嵌段高聚物在体系中的组份含量及嵌段高聚物中PS的重量百分含量,PS段分子量的大小对体系相容性也有影响。
The compatibility of block polymer and homopolymer blends has been a hot topic in recent years. In this work, the triblock copolymer styrene-butadiene-styrene (SBS), SBS-48, SBS-30, SBS-28 and polyvinyl methyl Ether blend system compatibility. The DSC results showed that with the increase of PS content in SBS, the compatibility of the system became better and the molecular weight of PS segment increased, which also contributed to the system compatibility. The results of FT-IR indicated that the relative intensities of bimodal COCH_3 exhibited near 1100cm -1 in PVME were very sensitive to the compatibility of the system. However, the 698cm -1 peak due to the C-H vibration of benzene ring However, unlike the PS / PVME system, there is a significant change with compatibility changes. All in all, the compatibility of the block polymer SBS / homopolymer PVME blends depends on the component content of the block polymer in the system and the weight percentage of PS in the block polymer, the size of the PS segment molecular weight System compatibility is also affected.