Effect of Surface Treatment on the Mode I Debonding of Interface Between Silica and Nylon6
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Effect of Surface Treatment on the Mode I Debonding of Interface Between Silica and Nylon6 Saeid Arabnejad, Sergei Manzhos and VPW Shim MRS Advances / FirstView Article / August 2016, pp 1 - 6 DOI: 10.1557/adv.2016.530, Published online: 29 July 2016
Link to this article: http://journals.cambridge.org/abstract_S2059852116005302 How to cite this article: Saeid Arabnejad, Sergei Manzhos and VPW Shim Effect of Surface Treatment on the Mode I Debonding of Interface Between Silica and Nylon6. MRS Advances, Available on CJO 2016 doi:10.1557/adv.2016.530 Request Permissions : Click here
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MRS Advances © 2016 Materials Research Society DOI: 10.1557/adv.2016.530
Effect of Surface Treatment on the Mode I Debonding of Interface Between Silica and Nylon6 Saeid Arabnejad, Sergei Manzhos, VPW Shim Department of Mechanical Engineering National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore ABSTRACT In this study, mode I debonding of the interface between silica and nylon-6 is examined using molecular dynamics, to predict the mechanical behavior of the interface between the polymer and silica. The effect of two types of surface treatment to the silica– Aminopropyltriethoxysilane and Hexamethyldisilazane (APTES and HMDZ) – on debonding is studied. Comparing the results for debonding between untreated, APTES and HMDZ modified surfaces suggests that the APTES treated surface provides a higher strength and toughness for surface debonding. The strength and toughness of the treated interfaces are higher than that of those of bare silica. The simulation results also show the formation of nano-sized voids in the polymer prior to separation with silica. INTRODUCTION Polymers serve as alternatives to conventional engineering materials, such as metals and ceramics, in many functional and structural applications. The mechanical properties of polymers can be enhanced by introducing fillers – e.g. carbon fiber, silica or clay – into the polymer matrix. Conventional polymer composites with fillers that are stiffer than the matrix often show improvements in mechanical properties, including increased stiffness, yield strength and glass transition temperature. However, in some composites, compromises such as reduced toughness often accompany these improvements 1. One of the known causes of this reduction in toughness is at the interface between the polymer and hardeners, where most cracks in composites initiate. Therefore, a clear understanding of the debonding process is important. The effect of interfacial behavior is more pronounced in nanocomposites compared to conventional composites, because of the higher interface area to volume ratio 2. It is noted that, the number of reliable models for predicting the properties of interfaces is relatively limited 3. Because of the complexity of physical measuremen
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