Adjustable crystalline stereocomplexes from enantiopure gradient polycarbonates
发表时间：2019-03-13
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- 论文类型：
- 期刊论文
- 第一作者：
- Liu, Ye
- 通讯作者：
- Lu, XB (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.
- 合写作者：
- He, Keke,Ren, Weimin,Li, Rongrong,Lu, Xiaobing
- 发表时间：
- 2016-11-01
- 发表刊物：
- SCIENCE CHINA-CHEMISTRY
- 收录刊物：
- SCIE、EI、CSCD、Scopus
- 文献类型：
- J
- 卷号：
- 59
- 期号：
- 11
- 页面范围：
- 1415-1420
- ISSN号：
- 1674-7291
- 关键字：
- crystalline polycarbonates; gradient stereocomplex; polymer assembly; cocrystallization
- 摘要：
- Stereoselective interaction was observed in the mixture of enantiopure gradient polycarbonate (denoted as PCOPC-g-PCPC, originated from the enantioselective terpolymerization of CO2, 3,4-epoxytetrahydrofuran (COPO) and cyclopentene oxide (CPO)) and various isotactic polycarbonates with opposite configuration in chloroform solution. The resultant crystalline stereocomplexes exhibit enhanced thermal stability and new crystalline behaviors, significantly distinct from their parent polymers. It was found that the cocrystallization selectively occurred between (R)-PCOPC (CO2/COPO copolymer) and (S)-PCOPC-enriched segment in the gradient terpolymer (S)-PCOPC-g-PCPC, while (R)-PCPC (CO2/CPO copolymer) selectively complexed with (S)-PCPC-enriched segment. No stereocomplexation was observed between (S)-PCOPC-g-PCPC and (S)-PCOPC or (S)-PCPC. This study is beneficial to finding new routes to prepare various semicrystalline materials having a wide variety of physical properties and degradability.
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- 否
