摘要
用共溶剂法制备了热致液晶聚酰胺/尼龙66分子复合材料。用DSC,WAXD和FTIR对复合材料的结晶行为和相容性进行了综合研究。DSC研究结果显示,不同组成共混物的熔点和结晶温度均发生明显下降,结晶速率和结晶度随液晶含量增加而下降,当液晶含量达到50%(质量分数)时,共混物出现超分子液晶态,体系具有明显的相容特征。WAXD结果显示,面间距随液晶聚酰胺含量增加而增加,说明液晶加入了尼龙66的结晶过程。FTIR结果显示,聚酰胺液晶与尼龙66分子间存在氢键作用,并且参与形成氢键作用官能团的比例随液晶含量的增加而增加。
TLCP/nylon-66 molecular composites were compounded by solution blend. Crystallization and miscibility were researched by DSC,WAXD and FTIR. DSC results showed that composites melting points and crystallization temperature were reduced due to additional TLCP, and crystallization rate and crystallization degree tended to decrease. Composites demonstrated supramolecular liquidcrystalline behavior in 50%（mass fraction）TLCP ratio. WAXD results showed that distance between crystalline surfaces increased while increasing TLCP concentrations, so it can be certain that TLCP had taken part in nylon-66 crystallization process. According to DSC and WAXD results, TLCP apparently restrain crystallization of nylon-66. FTIR approved that there was intermolecular hydrogenbonding between molecules of TLCP and nylon66, and intensity of intermolecular hydrogen-bonding increased with increasing TLCP concentrations.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2006年第7期39-42,共4页
Journal of Materials Engineering
基金
北京市自然科学基金资助项目(2002003)
关键词
热致液晶
相容性
尼龙66
超分子
氢键
TLCP
miscibility
nylon66
supramolecular
hydrogen-bonding
