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The influence of oxidative-thermal degradation of polypropylene on measured interface strength of glass fibre-polypropylene

Yang, Liu and Thomason, J.L. and Zhu, W.Z. (2010) The influence of oxidative-thermal degradation of polypropylene on measured interface strength of glass fibre-polypropylene. In: 14th European Conference on Composite Materials, ECCM14, 2010-06-07 - 2010-06-10, Budapest, Hungary.

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It was previously found that thermal-oxidative degradation of the polypropylene could significantly affect the measured interfacial strength of glass fibre reinforced polypropylene (GF-PP) micro-composite. In this work, different approaches have been employed to justify this influence. Hot-stage microscopy was used to establish a degradation profile of PP microdroplets that had different initial dimensions and results revealed that the reduction in droplet dimensions was affected by not only its initial droplet size and but also the presence of the fibre in the droplet. The Young's moduli of PP microdroplets with different heat treatments were examined by using nanoindentation technique and the results showed that there was significant stiffness deterioration in degraded samples and the severity is also related to the droplet size for a given heat treatment. Comparison of adhesion for GF-PP was also made between degraded and non-degraded samples. It shows that non-degraded samples give much higher values for interface strength of GF-PP than degraded ones.

Item type: Conference or Workshop Item (Paper)
ID code: 20624
Keywords: oxidative-thermal degradation, polypropylene, glass, fibre-polypropylene, Mechanical engineering and machinery, Mechanical Engineering, Mechanics of Materials, Ceramics and Composites, Polymers and Plastics
Subjects: Technology > Mechanical engineering and machinery
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Depositing user: Ms Katrina May
Date Deposited: 16 Jun 2010 12:48
Last modified: 21 Jul 2015 11:28
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