磺化聚苯乙烯/聚氨酯共混体系的力学性能及形态结构

用电子拉力机、ＭＤＳＣ,ＦＴＩＲ、ＳＥＭ、ＳＡＸＳ研究了磺化聚苯乙烯（ＳＰＳ）／聚醚型聚氨酯（ＰＵ）共体系撂学性能和形态结构。结果表明,在溶液法制备的含磺酸基１２．８％（摩尔）的ＳＰＳ／ＰＵ共混体系中,ＳＰＳ含量小于８０％（质量）时,共混物的拉伸强度小于加和性计算值,吾抵消效应;ＳＰＳ含量大于８０％时,则呈协同效应,拉伸强度协同效应产生的原因是由于共混组分间离子交 形成以及分子间相互作用力增大,共

Mechanical Properties and Morphology of Sulfonated Polystyrene/Polyurethane Blends

Sulfonated Polystyrene (SPS) containing 12.8 mol% of sulfonic acid group and Polyurethane (PU) were blended in solution used polypropylene oxide as soft segment, 4,4'-diphenylmethane diisocyanate and 1,4-butyldiol as hard segment. The mechanical property and morphology of SPS/PU blends were investigated. The results show that either the antogonism or the synergism of tensile strength occurs in the range of less or more than 80 mass% of SPS. The occurrence of synergism, the improvement of interfacial state and the decrease of (ionic) domain dimension contribute to the formation of ionic crosslinking network structure and the enhancement of fion-ion interaction force from the proton transfer between the sulfonic acid group of SPS and the sencondary amine group of PU.