Star-type transparent styrene butadiene impart resin was synthesized with styrene and butadiene as monomers, n- BuLi as initiator and epoxidized soybean oil as coupling agent via anionic polymerization. The effects of basic relative molecular mass, content of random tapered block and terminal methods on properties of the resin were studied. The results show that the resin's Izod impact strength rises while its melt flow rate lowers rapidly with the increase in the basic relative molecular mass: its impact strength and tensile strain at break decrease with the reduction in content of random tapered block of the copolymer: the resin having excellent optical properties can be acquired through preferably choosing carbon dioxide and deionized water or sebacylic acid as terminal agent.%以苯乙烯、丁二烯为单体,正丁基锂为引发剂,环氧大豆油为偶联剂,通过阴离子聚合制备了星型高透明抗冲击丁苯树脂.考察了相对分子质量、无规过渡段含量和终止方式对星型高透明抗冲击丁苯树脂性能的影响.结果表明:随着基础相对分子质量增加,星型高透明抗冲击丁苯树脂悬臂梁冲击强度增加,熔体流动速率迅速降低;随着无规过渡段含量的降低,星型高透明抗冲击丁苯树脂的冲击强度和拉伸断裂应变降低；通过优选二氧化碳加去离子水、癸二酸作为终止剂,可得到光学性能优异的星型高透明抗冲击丁苯树脂.
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