Phase transformation and self-assembly behavior of supramolecular rod-comb block copolymers

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Title:	Phase transformation and self-assembly behavior of supramolecular rod-comb block copolymers
Authors:	陳儀帆;Lee, Yi-Huan;Chang, Chun-Jie;Yang, Yi-Lung;Chiang, Chi-Ju;Lee, Yu-Ping;Shen, Ching;Tsai, Kang-Ting;Chen, Yi-Fan;Dai, Chi-An
Contributors:	工學院化學工程與材料工程學系
Keywords:	Applied sciences;Exact sciences and technology;Hierarchical structure;Macroterminator;Organic polymers;Physicochemistry of polymers;Properties and characterization;Rod–comb block copolymer;Structure, morphology and analysis
Date:	2014-05-13
Issue Date:	2026-04-21 14:25:56 (UTC+8)
Publisher:	Elsevier BV;Kidlington: Elsevier Ltd
Abstract:	摘要： We investigated the self-assembly behavior of a series of supramolecular rod–comb block copolymer complexes made by the hybridization of rod–coil diblock copolymers of poly (2,5-di(2-ethylhexyloxy)-1,4-phenylene vinylene)-b-poly(2-vinyl pyridine) (PPV-b-P2VPf) with different volume fractions, f, of the P2VP coils and an anionic surfactant, dodecyl benzenesulfonic acid (DBSA), that selectively interacts with the P2VP to form the side-chain comb teeth. The resulting hybrids show hierarchically ordered structures at multiple length scales, forming so-called structure-in-structure morphology. Notably, for PPV-b-P2VP0.56(DBSA)x, the larger-scale structure changes from a lamellar phase, to a broken lamella, and eventually to a hexagonally packed strip phase with increasing DBSA molar ratio (x) to P2VP monomer unit. Furthermore, simultaneous SAXS and WAXS measurements showed that the order-disorder transition temperatures of larger-scale structures in the PPV-P2VP0.56(DBSA) rod–comb systems were higher than those associated with the pristine PPV-P2VP0.56 polymers. The large-scale structure of PPV-P2VP0.56(DBSA) exists at temperatures around 210 °C even though the rod–rod interaction between PPV blocks disappear at ∼120 °C, signifying that the formation of the P2VP(DBSA) lamellar mesophase plays a critical role in forming the large-scale hexagonally packed strip structures. [Display omitted] 出版者： Kidlington: Elsevier Ltd 出版日期： 2014-05-13 出處： Polymer (Guilford), 2014-05, Vol.55 (10), p.2481-2490 版權： 2014 Elsevier Ltd 版權： 2015 INIST-CNRS 識別號： ISSN: 0032-3861 識別號： EISSN: 1873-2291 識別號： DOI: 10.1016/j.polymer.2014.01.056 識別號： CODEN: POLMAG
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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