【摘要】 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COCH₃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。更多还原

【Abstract】 Miscibility of blends of styrene-butadiene-styrene triblock copolymers SBS-48,SBS-30, SBS-28 and poly (vinyl methyl ethyl ether) (PVME) were investigated by clarity ,DSC and FT-IR. From optical clarity and DSC results, the higher the styrene content in SBS and the higher the molecule weight of PS segment were, the better the miscibility of the blends was . From FT-IR results, the relative peak intensity of the 1100 cm-1 region due to COCH3 bond of PVME was sensitive to the miscibility of SBS/PVME, while the peak position of 698 cm-1 region due to C-H out-of-plane bending vibration of phenyl ring in PS was not as sensitive as that in PS/PVME. It can be concluded that the miscibility in SBS/PVME blends is greatly affected by the composition of the block copolymers in blends and the composition of styrene in the copolymers. Molecule weight of PS segment in SBS is also important.更多还原