Abstract
Herein, we report novel heat-resistant nylon 10T/66/titania dioxide/glass fibre (nylon 10T/66/TiO2/GF) composites based on as-synthesised nylon 10T/66, which is a copolymer of poly(decamethylene terephthalamide) (nylon 10T). The non-isothermal crystallization behaviors of nylon 10T/66 and nylon 10T/66/TiO2/GF composites were investigated by differential scanning calorimetry (DSC). Jeziorny and Mo equations were used to analyse the crystallization kinetics, whereas the Kissinger method was applied to calculate the activation energy. It turned out that the introduction of TiO2 and GF could accelerate the crystallization of nylon 10T/66 and exhibited an effective heterogeneous nucleation effect. In addition, we conducted yellowing resistance and mechanical property analysis of the nylon 10T/66/TiO2/GF composites. The above results successfully demonstrated that the heat-resistant nylon 10T/66/TiO2/GF composites possess higher crystallization temperature and crystallization rate, whiter color, and better yellowing resistance and mechanical properties than previously as-synthesised nylon 10T/66. Consequently, nylon 10T/66/TiO2/GF composites have great potential to be used as a heat-resistant engineering plastic.
Highlights
Semi-aromatic nylon, combining the superior thermal stability of aromatic nylon and the excellent melt processability of aliphatic nylon, has been widely applied in the eld of electronics and automobile parts.[1,2] Typical commercial semi-aromatic nylon includes poly(hexamethylene terephthalamide) copolymers (Dupont, Solvary et al.), poly(nonamethylene terephthalamide) (Kuraray) and nylon 10T (Kingfa and Zenong)
The chemical structure of nylon 10T/66 is determined by 1H NMR spectra (Fig. 1)
The crystallization curves showed that nylon 10T/66/TiO2/GF has a higher crystallization temperature than nylon 10T/66
Summary
Semi-aromatic nylon, combining the superior thermal stability of aromatic nylon and the excellent melt processability of aliphatic nylon, has been widely applied in the eld of electronics (e.g., connectors, surface mount devices and re ectors) and automobile parts (e.g., powertrain components).[1,2] Typical commercial semi-aromatic nylon includes poly(hexamethylene terephthalamide) (nylon 6T) copolymers (Dupont, Solvary et al.), poly(nonamethylene terephthalamide) (nylon 9T) (Kuraray) and nylon 10T (Kingfa and Zenong). Glass ber (GF), due to its high strength and low price, has become one of the most extensive reinforcement materials.[8,9] Li et al investigated the effect of GF addition on mechanical properties of poly(arylene ether nitriles), and found the tensile strength, exural strength and izod impact strength of poly(arylene ether nitriles) were sharply increased in the presence of GF.[10] Titania dioxide (TiO2) is applied as whiteners in a variety of polymeric composiions.[11] Wang et al added TiO2 into knitted fabric, which successfully improved its color and yellowing resistance.[12]. In order to investigate the effect of GF and TiO2 on the crystallization of polymers and better understand the relationship between the structure and properties of materials, it is essential to study the crystallization kinetics, especially the non-. The yellowing resistance and the mechanical properties of nylon 10T/66/TiO2/GF composites were assessed and reported here
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