Study on shape memory effects of LC epoxy resins with lateral substituents
A series of shape memorized liquid crystalline el) oxides with different length of lateral substituents were prepared with several kinds of hardener. The dynamic mechanical analysis and the sharp memory properties of the resulted LC epoxy resins were studied by POM, WAXD, DSC and DMA. The results showed that the modulus in the rubbery region (ER)of the LC epoxides decreases as the length of lateral alkyl groups increases. And the shape memory properties were strongly impacted not only by the length of lateral substituents, but also by the kinds of hardener. The recovering speeds of the shape-memory liquid crystalline epoxides decrease as the increasing length of lateral alkyl groups. And recovering speeds ofLC epoxides cured with aromatic amine (DDM) are faster than that of LC epoxides cured with anhydride (THHPA). The local ordered structures and the lateral substituents played an important role in shape memory effects.
Liquid crystalline epoxy resin shape memory lateral substituent
Liyan Liang Dewen Zhou Mangeng Lu
Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China Key Laborato Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China
国际会议
2009 International Symposium on Liquid Crystal Science and Technology(2009国际液晶科技研讨会)
昆明
英文
391-393
2009-08-02（万方平台首次上网日期，不代表论文的发表时间）