Indexed by:
期刊论文
First Author:
Liu, Ye
Correspondence Author:
Lu, XB (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.
Co-author:
He, Keke,Ren, Weimin,Li, Rongrong,Lu, Xiaobing
Date of Publication:
2016-11-01
Journal:
SCIENCE CHINA-CHEMISTRY
Included Journals:
SCIE、EI、CSCD、Scopus
Document Type:
J
Volume:
59
Issue:
11
Page Number:
1415-1420
ISSN No.:
1674-7291
Key Words:
crystalline polycarbonates; gradient stereocomplex; polymer assembly;
cocrystallization
Abstract:
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.
Translation or Not:
no
