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Melt grafting of vinyltrimethoxysilane and water crosslinking of polypropylene/ethylene-propylene diene terpolymer blends

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Abstract

The melt grafting of vinyltrimethoxysilane (VTMS) onto polypropylene (PP)/ethylene-propylene diene terpolymer (EPDM) blends was studied. The effect of VTMS, EPDM and initiator concentrations on mechanical properties, melt flow index (MFI) and gel content of the modified PP/EPDM samples were investigated. The influence of coagents, i.e. styrene and trimethylolpropane trimethacrylate was also studied. Scanning electron microscopy (SEM) was used to observe the fractured surface of PP/EPDM and the modified PP/EPDM blends. The VTMS grafting reaction was in situ monitored using differential scanning calorimetry (DSC). Moreover, the thermal and crystallization behavior of VTMS-crosslinked PP/EPDM blends were studied by thermogravimetric analysis (TG) and DSC, respectively. It had been found that the thermal stability of VTMS-crosslinked PP/EPDM was improved. DSC measurements showed that the grafting reaction occurs from 170 to 220 °C and the crystallization temperatures increased compared with those of the untreated PP/EPDM.

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Acknowledgements

The financial support from the National Natural Science Foundation of China (No. 20776136), the open fund (HKLGF200701) of Henan Key Laboratory of Preventing and Curing on Coal Mine Gas & Fire of Hennan Polytechnic University, the open fund (HZ2007-KF07) of State Key Laboratory of Fire Science, University of Science and Technology of China, the program for New Century Excellent Talentsin University and National 11th Five-year Program (2006BAK01B03, 2006BAK06B06, 2006BAK06B07) is acknowledged.

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Authors and Affiliations

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Anhui, 230026, People’s Republic of China

    Shun Zhou, Zhengzhou Wang & Yuan Hu

  2. School of Materials Science and Engineering, Tongji University, Shanghai, 200092, People’s Republic of China

    Zhengzhou Wang

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  1. Shun Zhou
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  2. Zhengzhou Wang
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  3. Yuan Hu
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Correspondence to Zhengzhou Wang or Yuan Hu.

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Zhou, S., Wang, Z. & Hu, Y. Melt grafting of vinyltrimethoxysilane and water crosslinking of polypropylene/ethylene-propylene diene terpolymer blends. J Polym Res 16, 173–181 (2009). https://doi.org/10.1007/s10965-008-9215-1

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  • DOI: https://doi.org/10.1007/s10965-008-9215-1

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