【作者】 葛建宁； 毕吉福； 董为民； 任慧娟； 姜连升； 张学全；

【Author】 Ge Jianning, Bi Jifu, Dong Weimin, Ren Huijuan, Jiang Liansheng,Zhang Xuequan Changchun Institute of Applied Chemistry, the Chinese Academy of Sciences, Changchun 130022; 2.Changchun University of Technology, Changchun 130012; Changchun Institute of Technology, Changchun 130012)

【机构】 中国科学院长春应用化学研究所； 长春工程学院；

【摘要】 <正>3,4-聚异戊二烯橡胶是一种低生热、高抗湿滑的合成橡胶材料,用在胎面胶中可提高轮胎行驶的安全性能,还可作为密封材料、抗震材料和聚丙烯增韧改性剂。锂、钛和铁系催化剂可用于合成3,4-聚异戊二烯橡胶。含氮化合物为第三组分的铁系催化剂仅在较低的温度下具有较高的活性。温度升高活性明显降低。含磷化合物为配体的铁催化剂聚合异戊二烯,在较高的温度下具有较高的活性,并且随温度升高,活性增加。更多还原

【Abstract】 The catalytic system composed of iron(III) acetylacetonate, alkylaluminum, and diethyl phosphite is highly effective in isoprene polymerization, to provide polymer with 3,4 content of about 60%, Tg of about -21℃, while somewhat lower Mn (ca. 105). The catalytic system composed of iron(III) acetylacetonate, Al(i-Bu)3, and AIBN is also effective to provide polymer with 3,4 content of about 50%, Tg of about -20℃, and appreciably high Mn(ca. 106). The vulcanizates of 3,4-polyisoprene and NR or SBR exhibits excellent skid resistaces and no large effect on rolling resistance, when compared the results with that of NR or SBR.更多还原