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Microstructure and properties of polypropylene/glass fiber composites grafted with poly(pentaerythritol triacrylate)

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Abstract

Isotactic polypropylene(PP)/glass fiber(GF) composites were modified by grafting polymerization of polyfunctional monomer, pentaerythritol triacrylate (PETA), in the presence of 2,5-dimethyl-2,5-di(tert-butylperoxy) hexane peroxide (DDHP) via melt extrusion. Fourier transform infrared spectroscopy (FTIR), melt strength test (MS), mechanical property test, differential scanning calorimetry (DSC) and X-ray diffraction (XRD) were used to characterize the microstructure and properties of the modified composites. The crystallization kinetics was investigated by Mo method while apparent activation energy of crystallization of the composites was determined by Kissinger method. The FTIR results showed that the acrylic polymers were grafted onto the polypropylene chains. The grafting made the melt strengths and the mechanical properties of the modified composites, and the interfacial adhesion between PP and glass fiber all enhanced. High melting and crystallization temperatures, high crystallization rate and large activation energy of crystallization were also obtained after grafting. In addition, the grafted acrylic polymers recovered the depressed crystallization of polypropylene and restrained α-β transition in fatigue experiment.

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Authors and Affiliations

  1. Department of Materials Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China

    Qinglan Ni & Yaorong Wang

  2. Division of Nonwoven Materials Engineering, Faculty of Textiles and Clothing Engineering, Soochow University, Suzhou, Jiangsu, 215021, China

    Xinsheng Zhu & Zhonghua Liu

  3. Huatong (Suzhou) Science and Technology Co. Ltd, Suzhou, Jiangsu, 215123, China

    Zhonghua Liu

Authors
  1. Qinglan Ni
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  2. Xinsheng Zhu
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  3. Yaorong Wang
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  4. Zhonghua Liu
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Corresponding authors

Correspondence to Xinsheng Zhu or Yaorong Wang.

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Ni, Q., Zhu, X., Wang, Y. et al. Microstructure and properties of polypropylene/glass fiber composites grafted with poly(pentaerythritol triacrylate). J Polym Res 18, 917–926 (2011). https://doi.org/10.1007/s10965-010-9489-y

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  • DOI: https://doi.org/10.1007/s10965-010-9489-y

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