| 茂钛催化剂间规聚苯乙烯-b-聚丙烯嵌段共聚物的合成及产物分离与表征 |
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| 引用本文： | 祝方明,林尚安.茂钛催化剂间规聚苯乙烯-b-聚丙烯嵌段共聚物的合成及产物分离与表征[J].高分子学报,1997(4):462-468. |
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| 作者姓名： | 祝方明 林尚安 |
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| 作者单位： | 中山大学高分子研究所 |
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| 基金项目： | 国家自然科学基金,广东省自然科学基金 |
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| 摘 要： | 以茂基三正丙氧基钛［ＣｐＴｉ（Ｏ ｎ Ｐｒ）３］和改性的甲基铝氧烷（ＭＡＯ）为催化体系，用于合成间规聚苯乙烯 ｂ 聚丙烯嵌段共聚物．丙烯先预聚，然后加入苯乙烯进行嵌段共聚合反应，具有较高的催化效率（９５００ｇＰ／ｇＴｉ）．研究了丙烯预聚合时间，共聚合反应温度、催化体系组份及浓度等聚合条件对嵌段共聚合反应的影响．共聚反应总产物经沸丁酮、沸庚烷和４０℃四氢呋喃（ＴＨＦ）等溶剂的连续抽提分离，发现嵌段共聚物主要存在于沸丁酮的可溶级份中．将各分离级份用１３Ｃ ＮＭＲ、Ｘ 射线衍射和ＤＳＣ等分析手段进行结构表征并加以讨论．
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| 关 键 词： | 茂金属催化剂，苯乙烯与丙烯共聚合反应，间规聚苯乙烯 b 聚丙烯嵌段共聚物 |
TITANOCENE CATALYTIC SYNTHESIS OF sPS b aPP BLOCK COPOLYMER AND CHARACTERIZATION |
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| ZHU Fangming,\ LIN Shangan.TITANOCENE CATALYTIC SYNTHESIS OF sPS b aPP BLOCK COPOLYMER AND CHARACTERIZATION[J].Acta Polymerica Sinica,1997(4):462-468. |
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| Authors: | ZHU Fangming \ LIN Shangan |
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| Abstract: | A novel syndiotactic polystyrene b polypropene(sPS b PP)copolymer was synthesized in this laboratory with homgenous metallocene catalyst of η 5 cyclopentadienyltripropoxy titanium and MAO. The influence factor of monomers feed ratio,catalyst concentration,Al/Ti molar ratio and polymerization temperature on block copolymerization has been investigated.The copolymerization products were fractionated by succesive solvents extration with boiling butanone,boiling heptane and 40℃ THF. The titled block copolymer with 20～30wt% percent of total product,chiefly existing in butanone soluble fraction,were isolated and characterized by 13 C NMR,FTIR,WAXD,DSC methods. |
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| Keywords: | Syndiotactic polystyrene b polypropene copolymers(sPS b aPP) Titanocene catalyst Methylaluminoxane(MAO) Syndiospecific polymerization of styrene |
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