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采用自由基溶液聚合法合成了低相对分子质量端羟基聚丁二烯-苯乙烯橡胶(HTBS),通过傅里叶变换红外光谱表征了HTBS的微观结构,并研究了用其制得聚合物材料的力学性能。结果表明,采用部分连续加入引发剂方式制备的HTBS分子量分布较窄;当HTBS的结合苯乙烯质量分数为16%～26%时,顺式-1,4-结构和反式-1,4-结构质量分数为53%～61%,1,2-结构质量分数为20%～24%;由HTBS制得的聚氨酯弹性体和聚氨酯防水涂料具有较好的力学性能,另外HTBS可有效提高聚苯乙烯树脂的扯断伸长率。
Low molecular weight hydroxyl-terminated polybutadiene-styrene rubber (HTBS) was synthesized by free-radical solution polymerization. The microstructure of HTBS was characterized by Fourier transform infrared spectroscopy. The properties of HTBS, The mechanical properties. The results showed that the molecular weight distribution of HTBS prepared by partial continuous addition of initiator was narrower. When the content of styrene in HTBS was 16% ~ 26%, the cis-1,4-structure and trans- The mass fraction of the structure is 53% -61%, and the mass fraction of 1,2-structure is 20% -24%. The polyurethane elastomer and polyurethane waterproof coating prepared by HTBS have good mechanical properties, and the HTBS can effectively increase the content of polybenzene Tensile elongation of vinyl.