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Abstract：
This study presents the characterization of cross-linking parameters of a liquid crystalline epoxy monomer with an aromatic diamine as a curing agent. The mixture tested consisted of bis [4-(10,11-epoxyundecanoyloxy)benzoate] p-phenylene (LCEM) and 1,3-phenylenediamine (1,3-PDA). This paper focuses on the structural characterization of such systems using X-ray analysis. To investigate this, a comprehensive analysis was conducted using Differential Scanning Calorimetry (DSC) and Wide-Angle X-ray Scattering (WAXS). Through DSC analysis, the curing behavior and transition temperature of the liquid crystal epoxy system were established. To fully characterize the cross-linking of the system, a novel technique called DSC-TOPEM® was employed. The use of this technique enabled real-time monitoring of the curing process and provided precise information on the cross-linking energy, which resulted in the finding that the mixture was cross-linking faster than expected. WAXS analysis was performed to assess the structural changes formed during the cross-linking. The results of this analysis confirm that lower cross-linking temperatures of the mixture cause better ordering of mesogens than higher ones.
摘要：
这项研究介绍了以芳族二胺为固化剂的液晶环氧单体的交联参数的表征。所测试的混合物由双[4-(10,11-环氧十一烷酰基氧基)苯甲酸酯]对亚苯基(LCEM)和1,3-苯二胺(1,3-PDA)组成。本文主要研究使用X射线分析对此类系统进行结构表征。为了调查这一点，使用差示扫描量热法（DSC）和广角X射线散射（WAXS）进行了综合分析。通过DSC分析,建立了液晶环氧树脂体系的固化行为和转变温度。为了充分表征系统的交联，采用称为DSC-TOPEM®的新技术。使用这种技术可以实时监测固化过程，并提供有关交联能量的精确信息，这导致发现混合物的交联速度比预期的要快。进行WAXS分析以评估在交联期间形成的结构变化。该分析的结果证实，混合物的较低交联温度比较高的交联温度引起更好的介晶有序化。
