Isotactic Polypropylene-Based Stereoregular Diblock Copolymers: Syntheses and Self-Assembly
Isotactic Polypropylene-Based Stereoregular Diblock Copolymers: Syntheses and Self-Assembly
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全同立构聚丙烯基立构二嵌段共聚物：合成和自组装
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
R. Ho
中科院分区：
文献类型：
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作者：
Jing;Wen;Chia;J. Tsai;T. Wang;Tsai;R. Ho
通过羟基封端的等规聚丙烯(IPP)的后聚反应制备了基于聚烯烃的立体规则二嵌段共聚物(BCP)，成功地制备了一系列结构明确的基于iPP的立体规则BCP，用于自组织成各种纳米结构。利用ANSA-茂金属催化剂催化丙烯等规聚合烷基铝选择性链转移，合成了羟基封端的iPP预聚体，最终得到烷基铝封端的iPP。随后，用O2/H_2O_2原位处理铝封端的iPP，成功地制备了羟基封端的iPP。将基于iPP的预聚体的末端羟基端基进行对甲苯磺化反应，生成具有定量官能团转化率的对甲苯基末端封端的iPP。随后，将甲苯磺基末端封端的iPP与活性阴离子聚(2-乙烯基吡啶)偶联.
The preparation of polyolefin-based stereoregular diblock copolymers (BCPs) by postpolymerization of hydroxy-capped isotactic polypropylene (iPP) led to the successful generation of a series of structurally well-defined iPP-based stereoregular BCPs for self-organizing into various nanostructures. The hydroxy-capped iPP prepolymer was synthesized by using ansa-metallocene catalysts to mediate the selective chain transfer to alkylaluminums during isospecific polymerization of propylene, leading to the production of alkylaluminum end-capped iPP as the preliminary product. Subsequently, in-situ O2/H2O2 treatment of the resulting aluminum-capped iPP led to the successful preparation of hydroxy-capped iPP. The terminal hydroxyl end group of the iPP-based prepolymer was allowed to undergo tosylation reaction that led to the production of tosyl group end-capped iPP with a quantitative functional group conversion ratio. Subsequently, coupling the tosyl group end-capped iPP with living anionic poly(2-vinylpyridine)...