纸质出版日期:1997-8-20
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烯烃序贯聚合中嵌段物的形成证明王益龙(大连理工大学化工学院高分子材料系大连116012)庞德仁黄葆同(中国科学院长春应用化学研究所长春130022)关键词乙丙共聚物,嵌段,聚合,络合催化利用络合催化聚合方法能否合成出乙丙嵌段共聚物是一个有争议的问题[1,2].多数学者从计算活性链的寿命[3]和表征多嵌段物嵌段点的存在[1]来证明合成出乙丙嵌段共聚物,但由于聚合过程中有链转移存在,并且链转移?...
PP EPR and PP EPR PP copolymers were synthesized by sequential changing olefin monomers in a slurry of δ T iCl3 Et2AlCl hexane. Experiments showed that the polymer chain was living within 100 minutes. By means of measurement of dynamic and internal friction spectra,it was demonstrated that PP EPR and PP EPR PP only have one glass transition temperature ( T g) respectively,and each of them showed good compatibilization for PP/EPT blend. All these indicate that it is possible to prepare di block and tri-block copolymers of ethylene and propylene in sequential polymerization of olefin with Ziegler-Natta catalyst.
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