Thermal properties and crystallite morphology of nylon 66 modified with a novel biphenyl aromatic liquid crystalline epoxy resin

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 e...

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Bibliographic Details
Published in:International journal of molecular sciences 2013-10, Vol.14 (10), p.20682-20691
Main Authors: Cai, Zhiqi, Mei, Shuang, Lu, Yuan, He, Yuanqi, Pi, Pihui, Cheng, Jiang, Qian, Yu, Wen, Xiufang
Format: Article
Language:English
Subjects:
Biphenyl Compounds - chemistry
Crystallization
Epoxy resins
Epoxy Resins - chemistry
Heat resistance
Impact strength
Morphology
Nylons - chemistry
Polymers
Rheology
Temperature
Viscosity
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Summary: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.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms141020682