NDLI: ABA type liquid crystalline triblock copolymers by combination of living cationic polymerizaition and ATRP: synthesis and self-assembly

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Soft Matter Vol - 4 Issue - 5

Soft Matter Vol - 4 Issue - 4

Soft Matter Vol - 4 Issue - 3

Soft Matter Vol - 4 Issue - 2

Soft Matter Vol -3

Soft Matter Vol -2

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ABA type liquid crystalline triblock copolymers by combination of living cationic polymerizaition and ATRP: synthesis and self-assembly

Content Provider	Royal Society of Chemistry (RSC)
Author	Shen, Zhihao Wu, Yi-Xian Fan, Xing-He Zhou, Qi-Feng Gao, Long-Cheng Zhang, Cheng-Long Chen, Xiao-Fang Liu, Xun
Copyright Year	2008
Abstract	Lamellar and hexagonal–coil–cylinder self-assembled structures of ABA type triblock copolymers containing mesogen-jacketed liquid crystalline polymer (MJLCP) as the rod block, and polyisobutylene (PIB) as the coil middle block were discovered. PIB was synthesized by living cationic polymerization of isobutylene initiated by 1,4-bis(2-chloro-2-propyl)benzene (p-DCC), and then a small amount of styrene was introduced at the end of the PIB chains to form the difunctional PIB macroinitiator with -CH2CH(C6H5)Cl end groups for further atom transfer radical polymerization (ATRP). 2,5-Bis[(4-methoxyphenyl)oxycarbonyl]styrene (MPCS) was block-copolymerized from the difunctional PIB macroinitiators at 110 °C. The molecular characterization of the triblock copolymers was performed with 1H NMR, 13C NMR, gel permeation chromatography (GPC), and thermogravimetric analysis (TGA). Their phase structures and transitions were investigated by differential scanning calorimetry (DSC), small angle X-ray scattering (SAXS), and polarized optical microscopy experiments. It was demonstrated that the triblock copolymers formed lamellar structures at moderate rod fractions and hexagonal coil cylinders in the rod matrix at high rod fractions. The d-spacing of the microphase-separated structures was influenced by the liquid crystalline phase of rod-like PMPCS blocks.
Starting Page	1230
Ending Page	1236
Page Count	7
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	4
Issue Number	6
Journal	Soft Matter
DOI	10.1039/b718558h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Atom-transfer radical-polymerization Differential scanning calorimetry Butyl rubber Thermogravimetric analysis Lamellar Optical microscope PIB Polymer Cationic polymerization Gel permeation chromatography Small-angle X-ray scattering DSC Isobutylene Benzene Styrene Extracellular matrix Nuclear magnetic resonance
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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