Journal article
Synthesis of poly(butylene terephthalate)-block-poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) multiblock terpolymers via a facile PROP method
Polymer (Guilford), v 130, pp 199-208
09 Nov 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We present here the application of in situ cascade polycondensation-coupling ring-opening polymerization (PROP) method for the facile synthesis of a series of three-component poly(butylene terephthalate)-block-poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) multiblock terpolymers (PBT-b-PEO-b-PPO-b-PEO-b-PBT)n, using cyclic oligo(butylene terephthalate)s (COBTs) as monomers and dihydroxyl end-functional PEO-b-PPO-b-PEO (EPE) as macroinitiator. The structure details of these copolymers were characterized by 1H-1H gCOSY and 1H-13C gHSQC NMR spectra. With the assignment of multiblock chain ends, block segmental ends and corresponding groups for each segment, the number-average molecular weights for multiblock terpolymers and each block segment were estimated by the quantitative 1H NMR spectra. Polymerization kinetics studies confirm the PROP mechanism. With crystalline PBT and PEO segments, the multiblock terpolymers are double-crystalline polymers, where the melting point and crystallinity of PBT and PEO segments increase with corresponding PBT and PEO content, respectively. The covalent linking of PBT segments with PEO segments leads to the confined crystallization environment for both blocks, where a strong depression on melting point of PEO crystals was observed, which becomes amorphous at an EPE triblock content of 50%. TEM and SAXS results show interesting lamella-like microphase separation morphologies in these multiblock terpolymers.
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•Double crystalline multiblock terpolymers have been synthesized by a PROP method.•The confinement crystallization behavior was observed in these multiblock terpolymers.•These multiblock terpolymers show interesting microphase separation morphologies.
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Details
- Title
- Synthesis of poly(butylene terephthalate)-block-poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) multiblock terpolymers via a facile PROP method
- Creators
- Minzhi Zhang - Soochow UniversityJiali Gu - Soochow UniversityXiang Zhu - Soochow UniversityLingfeng Gao - Soochow UniversityXiaohong Li - Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, ChinaXiaoming Yang - Soochow UniversityYingfeng Tu - Soochow UniversityChristopher Y. Li - Drexel University
- Publication Details
- Polymer (Guilford), v 130, pp 199-208
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000414173500022
- Scopus ID
- 2-s2.0-85031088129
- Other Identifier
- 991019168794704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Polymer Science