| 三聚磷腈为核的A3B3六杂臂偶氮苯星型聚合物的合成及其热致液晶行为研究 |
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| 引用本文： | 周波轩,张兴宏,孙学科,傅智盛,王齐,范志强,戚国荣.三聚磷腈为核的A3B3六杂臂偶氮苯星型聚合物的合成及其热致液晶行为研究[J].高分子学报,2009,0(8):735-740. |
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| 作者姓名： | 周波轩 张兴宏 孙学科 傅智盛 王齐 范志强 戚国荣 |
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| 作者单位： | 浙江大学高分子科学与工程学系,高分子合成与功能构造教育部重点实验室,杭州,310027 |
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| 基金项目： | 国家自然科学基金，中国博士后科学基金 |
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| 摘 要： | 通过聚乙二醇单甲醚钠盐(MPEG-Na)和4-甲氧基-4′-(6-羟基己氧基)偶氮苯钠盐(AZO-Na)与六氯三聚磷腈的分步取代反应,合成了含偶氮苯基团的A3B3六杂臂星型聚合物NP(MPEG550)(AZO)]3和NP(MPEG1100)(AZO)]3.采用傅里叶红外光谱(FT-IR)、核磁共振谱(1H-NMR)和凝胶渗透色谱(GPC)手段确证了聚合物的基本结构,所得两种聚合物为接近单分散的多杂臂星型聚合物.采用热分析(DSC)和热台偏光显微镜(POM)研究了两种星型聚合物的热转变行为.结果表明,NP(MPEG550)(AZO)]3具有可逆的热致液晶转变行为(TS-N=60.5℃;TN-I=104.7℃),为双向性液晶聚合物.而对于NP(MPEG1100)(AZO)]3,观察不到液晶相转变行为,NP(MPEG1100)(AZO)]3聚合物中柔性PEG链段含量过高可能导致其偶氮苯链段难局部有序而不能呈现液晶相转变.
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| 关 键 词： | 杂臂星型聚合物 偶氮苯 磷腈 液晶 |
| 收稿时间： | 2009-02-02 |
SYNTHESIS AND THEIR THERMOTROPIC LIQUID CRYSTALLINE BEHAVIOR OF CYCLOTRIPHOSPHAZENE BASED A3B3 MIKTOARM AZOBENZENE-CONTAINING STAR-SHAPED COPOLYMERS |
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| ZHOU Boxuan,ZHANG Xinghong,SUN Xueke,FU Zhisheng,WANG Qi,FAN Zhiqiang,QI Guorong.SYNTHESIS AND THEIR THERMOTROPIC LIQUID CRYSTALLINE BEHAVIOR OF CYCLOTRIPHOSPHAZENE BASED A3B3 MIKTOARM AZOBENZENE-CONTAINING STAR-SHAPED COPOLYMERS[J].Acta Polymerica Sinica,2009,0(8):735-740. |
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| Authors: | ZHOU Boxuan ZHANG Xinghong SUN Xueke FU Zhisheng WANG Qi FAN Zhiqiang QI Guorong |
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| Institution: | ZHOU Boxuan,ZHANG Xinghong,SUN Xueke,FU Zhisheng,WANG Qi,FAN Zhiqiang,QI Guorong(Department of Polymer Science and Engineering,Key Laboratory of Macromolecular Synthesis and Functionalization,Ministry of Education,Zhejiang University,Hangzhou 310027) |
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| Abstract: | A new type of A3B3 six-arm azobenzene-containing star-shaped copolymers based on cyclotriphosphazene was prepared by stepwise nucleophilic substitution of hexachlorocyclotriphosphazene,using the sodium salt of methoxy poly(ethylene glycol) (MPEG-Na) and the sodium salt of 4-methoxy-4'-(6-hydroxyhexyloxy)azobenzene (AZO-Na) in sequence.Structures of the resultant copolymers NP(MPEG550)(AZO)]3 and NP(MPEG1100)-(AZO)]3 were characterized by Fourier transform infrared spectroscopy (FT-IR),proton nuclear magne... |
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| Keywords: | Miktoarm star-shaped copolymer Azobenzene Phosphazene Liquid crystalline |
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