title: Thermal properties and crystallite morphology of nylon 66 modified with a novel biphenyl aromatic liquid crystalline epoxy resin.
abstract: In order to improve the thermal properties of important engineering plastics, a novel kind of liquid crystalline epoxy resin (LCER), 3,3',5,5' -Tetramethylbiphenyl-4,4' -diyl bis(4-(oxiran-2-ylmethoxy)benzoate) (M1) was introduced to blend with nylon 66 (M2) at high temperature. The effects of M1 on chemical modification and crystallite morphology of M2 were investigated by rheometry, thermo gravimetric analysis (TGA), dynamic differential scanning calorimetry (DSC) and polarized optical microscopy (POM). TGA results showed that the initial decomposition temperature of M2 increased by about 8 °C by adding 7% wt M1, indicating the improvement of thermal stability. DSC results illustrated that the melting point of composites decreased by 12 °C compared to M2 as the content of M1 increased, showing the improvement of processing property. POM measurements confirmed that dimension of nylon-66 spherulites and crystallization region decreased because of the addition of liquid crystalline epoxy M1.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China. xfwen@scut.edu.cn.
authors.forename: Zhiqi
authors.initials: Z
authors.lastname: Cai
authors.forename: Shuang
authors.initials: S
authors.lastname: Mei
authors.forename: Yuan
authors.initials: Y
authors.lastname: Lu
authors.forename: Yuanqi
authors.initials: Y
authors.lastname: He
authors.forename: Pihui
authors.initials: P
authors.lastname: Pi
authors.forename: Jiang
authors.initials: J
authors.lastname: Cheng
authors.forename: Yu
authors.initials: Y
authors.lastname: Qian
authors.forename: Xiufang
authors.initials: X
authors.lastname: Wen
mesh_terms: D001713:Biphenyl Compounds / Q000737:chemistry*; D003460:Crystallization; D004853:Epoxy Resins / Q000737:chemistry*; D009757:Nylons / Q000737:chemistry*; D013696:Temperature
chemical_list: D001713:Biphenyl Compounds; D004853:Epoxy Resins; D009757:Nylons; C010574:biphenyl