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Design, Synthesis, and Multiple Hierarchical Ordering of a Novel Side-Chain Liquid Crystalline-Rod Diblock Copolymer
Xie, He-Lou1,2,3,4; Liu, Yi-Xin3,4; Zhong, Guan-Qun1,2; Zhang, Hai-Liang1,2; Chen, Er-Qiang3,4; Zhou, Qi-Feng3,4
2009-11-24
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume42Issue:22Pages:8774-8780
AbstractA novel double liquid crystalline (LC) block copolymer (BCP) composed of poly[omega-(4'-methoxybiphenyl-4-yloxy)hexyl methacrylate] (PMBHMA) and poly{2,5-bis[(4-meth-oxyphenyl)oxycarbonyl]styrene} (PMPCS) was designed and successfully synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. Whereas PMBHMA is a conventional side-chain LC (SCLC) polymer, PMPCS is a typical mesogen-jacketed I,C polymer, which can serve as rod after it forms columnar LC (Phi) phase. Therefore, the PMBHMA-b-PMPCS is an SCLC-rod BCP. The phase structures and transitions of the PMBHMA-b-PMPCS synthesized with a PMPCS volume fraction of similar to 49% were investigated using various techniques including thermal analysis and X-ray scattering and diffraction methods. A microphase-separated lamellar morphology was identified for this SCLC-rod sample. The Phi phase of the PMPCS block with the rod direction perpendicular to the interface remained unchanged and impacted the LC transitions of PMBHMA blocks greatly. We found that the smectic A phase of the PMBHMA disappeared, and meanwhile, its nematic phase got stabilized over a wide temperature range. At low temperatures, small smectic E domains with homogeneous orientation formed in the PMBHMA block domains. Our work demonstrates that the confinement imposed by the rod block and dimension commensurability of the ordered structures are indeed crucial for SCLC-rod BCPs.
DOI10.1021/ma9017668
Indexed BySCI
Language英语
WOS IDWOS:000271756500031
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68180
Collection中国科学院化学研究所
Corresponding AuthorZhang, Hai-Liang
Affiliation1.Xiangtan Univ, Key Lab Polymer Mat & Applicat Technol Hunan Prov, Key Lab Adv Funct Polymer Mat Coll, Xiangtan 411105, Hunan, Peoples R China
2.Xiangtan Univ, Univ Hunan Prov, Coll Chem, Xiangtan 411105, Hunan, Peoples R China
3.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Dept Polymer Sci & Engn, Beijing 100871, Peoples R China
4.Peking Univ, Coll Chem & Mol Engn, Key Lab Polymer Chem & Phys, Minist Educ, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Xie, He-Lou,Liu, Yi-Xin,Zhong, Guan-Qun,et al. Design, Synthesis, and Multiple Hierarchical Ordering of a Novel Side-Chain Liquid Crystalline-Rod Diblock Copolymer[J]. MACROMOLECULES,2009,42(22):8774-8780.
APA Xie, He-Lou,Liu, Yi-Xin,Zhong, Guan-Qun,Zhang, Hai-Liang,Chen, Er-Qiang,&Zhou, Qi-Feng.(2009).Design, Synthesis, and Multiple Hierarchical Ordering of a Novel Side-Chain Liquid Crystalline-Rod Diblock Copolymer.MACROMOLECULES,42(22),8774-8780.
MLA Xie, He-Lou,et al."Design, Synthesis, and Multiple Hierarchical Ordering of a Novel Side-Chain Liquid Crystalline-Rod Diblock Copolymer".MACROMOLECULES 42.22(2009):8774-8780.
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