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Int. J. Mol. Sci. 2013, 14(10), 20682-20691; doi:10.3390/ijms141020682

Thermal Properties and Crystallite Morphology of Nylon 66 Modified with a Novel Biphenyl Aromatic Liquid Crystalline Epoxy Resin

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
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Received: 19 August 2013 / Revised: 23 September 2013 / Accepted: 30 September 2013 / Published: 15 October 2013
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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.
Keywords: liquid crystalline epoxy resin (LCER); Nylon66; Thermal properties; POM liquid crystalline epoxy resin (LCER); Nylon66; Thermal properties; POM
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Cai, Z.; Mei, S.; Lu, Y.; He, Y.; Pi, P.; Cheng, J.; Qian, Y.; Wen, X. Thermal Properties and Crystallite Morphology of Nylon 66 Modified with a Novel Biphenyl Aromatic Liquid Crystalline Epoxy Resin. Int. J. Mol. Sci. 2013, 14, 20682-20691.

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