| 树枝状嵌段聚合物D-PCL-b-PS在不对称末端受限条件下的结晶行为 |
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| 引用本文： | 张凤波,谢续明,袁金颖,袁伟忠,闫强.树枝状嵌段聚合物D-PCL-b-PS在不对称末端受限条件下的结晶行为[J].高分子学报,2011(4):354-359. |
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| 作者姓名： | 张凤波 谢续明 袁金颖 袁伟忠 闫强 |
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| 作者单位： | 张凤波,谢续明,ZHANG Fengbo,XIE Xuming(清华大学化工系高分子所先进材料教育部重点实验室,北京,100084);袁金颖,闫强,YUAN Jinying,YAN Qiang(清华大学化学系有机光电子与分子工程教育部重点实验室,北京,100084);袁伟忠,YUAN Weizhong(清华大学化学系有机光电子与分子工程教育部重点实验室,北京,100084;同济大学材料科学与工程学院纳米与生物高分子材料研究所,上海,200092) |
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| 基金项目： | 国家自然科学基金，博士点基金 |
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| 摘 要： | 研究了树枝状嵌段聚合物聚(ε-b-己内酯)-b-聚苯乙烯(D-PCL-b-PS)的分子结构对PCL链段受限结晶行为的影响.首先,通过活性正离子开环聚合(ROP)合成了树枝状的嵌段聚合物D-PCL.在此基础上用原子转移自由基聚合(ATRP)的方法,合成了树枝状的嵌段聚合物D-PCL-b-PS,在结晶的PCL链段的两个末端...
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| 关 键 词： | 树枝状嵌段聚合物 聚(ε-己内酯)-b-聚苯乙烯 受限结晶 分子结构 末端受限 |
CONFINED CRYSTALLIZATION OF DENDRITIC BLOCK COPOLYMERS POLY(ε-CAPROLACTONE) -b-POLYSTYRENE ASYMMETRIC CHAIN END RESTRICTION |
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| ZHANG Fengbo,XIE Xuming,YUAN Jinying,YUAN Weizhong,YAN Qiang.CONFINED CRYSTALLIZATION OF DENDRITIC BLOCK COPOLYMERS POLY(ε-CAPROLACTONE) -b-POLYSTYRENE ASYMMETRIC CHAIN END RESTRICTION[J].Acta Polymerica Sinica,2011(4):354-359. |
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| Authors: | ZHANG Fengbo XIE Xuming YUAN Jinying YUAN Weizhong YAN Qiang |
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| Abstract: | The confined crystallization behavior of the dendritic block copolymer poly(ε-caprolactone)-b-polystyrene(D-PCL-b-PS) was investigated under asymmetric chain ends restriction of PCL blocks.At the beginning,the block copolymer was synthesized through combination of ring opening polymerization(ROP) and atom transfer radical polymerization(ATRP).The crystallizability of PCL block varied significantly with this specific dendritic molecular structure.During the non-isothermal crystallization process,only a fraction of slightly restricted PCL blocks could form crystals through extinct cold crystallization,and the significantly restricted PCL blocks was unable to crystallize during the limited cold crystallization process.Further isothermal crystallization was carried out to make samples completely crystallize.It was found when the |
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| Keywords: | Dendritic block copolymer Poly(ε-caprolactone)-b-polystyrene Confined crystallization Molecular structure Asymmetric chain end restriction |
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