화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.27, No.9, 911-918, September, 2019
DOI10.1007/s13233-019-7128-y  Export Citation
Poly(propylene ether carbonate)-Based Di- and Tri-Block Copolymers: Synthesis and Chromatographic Characterization
Rubina Abdul-Karim, Syed Ghulam Musharraf, and Muhammad Imran Malik†
  • H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
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In this study, ring-opening polymerization (ROP) of propylene carbonate (PC) is conducted for synthesis of novel amphiphilic di- and tri-block copolymers containing poly(ethylene oxide) as hydrophilic with poly(propylene ether-carbonate (PPEC) as a hydrophobic block. A series of di- and tri-block copolymers is synthesized, by using macro-initiators [polyethylene glycol monomethyl ethers and poly(ethylene glycol)s] of different molar masses, while systematically varying monomer to macro-initiator ratio. The synthesized block copolymers are characterized by size exclusion chromatography, for augmentation in the molar mass, NMR for average chemical composition while liquid chromatography at critical conditions, is used for comparison of individual block lengths alongside purity of block copolymers, with regard to presence of homopolymers of both types. Chromatographic critical conditions of the polymer synthesized by ROP of PC, PPEC, are reported for the first time. Established chromatographic critical conditions of PEG and PPEC, successfully tracked presence of homopolymers of both types, with fair comparison of individual block lengths of the block copolymers synthesized by the same macro-initiator.
Keywords:biodegradable polymers;poly(propylene ether-carbonate);amphiphilic block copolymers;liquid chromatography at critical conditions;chromatographic critical conditions of poly(propylene ether-carbonate)
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