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首页> 外文期刊>Journal of Applied Polymer Science >Effects of vinyltrimethoxy silane on thermal properties and dynamic mechanical properties of polypropylene-wood flour composites
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Effects of vinyltrimethoxy silane on thermal properties and dynamic mechanical properties of polypropylene-wood flour composites

机译：乙烯基三甲氧基硅烷对聚丙烯-木粉复合材料热性能和动态力学性能的影响

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摘要

The viability of vinyltrimethoxy silane was investigated as a coupling agent for the manufacture of wood-plastic composites (WPC). The effect of silane pretreatment of the wood flour on the thermal and the dynamic mechanical properties and thermal degradation properties of the composites were studied. Moreover, the effect of organosilane on the properties of composites was compared with the effect of maleated polypropylene (MAPP). DSC studies indicated that the wood flour acts as a PP-nucleating agent, increasing the PP crystallization rate. In general, pretreatment with small amounts of silane improved this behavior in all the WPCs studied. Thermal degradation studies of the WPCs indicated that the presence of wood flour delayed degradation of the PP. Silane pretreatment of the wood flour augmented this effect, though without significantly affecting cellulose degradation. Studies of dynamic mechanical properties revealed that the wood flour (at up to 30 wt %) increased storage modulus values with respect to those of pure PP; in WPCs with a higher wood flour amount, there was no additional increase in storage modulus. Pretreatment of the wood flour with silane basically had no effect on the dynamic mechanical properties of the WPC. These results show that with small amounts of vinyltrimethoxy silane similar properties to the MAPP are reached. (c) 2008 Wiley Periodicals, Inc.
机译：研究了乙烯基三甲氧基硅烷作为木塑复合材料（WPC）制造偶联剂的可行性。研究了木粉的硅烷预处理对复合材料的热力学，动态力学性能和热降解性能的影响。此外，将有机硅烷对复合材料性能的影响与马来酸化聚丙烯（MAPP）的影响进行了比较。 DSC研究表明木粉充当PP成核剂，增加了PP的结晶速率。通常，在所有研究的WPC中，使用少量硅烷进行的预处理都会改善这种行为。 WPC的热降解研究表明，木粉的存在延迟了PP的降解。尽管未显着影响纤维素的降解，但木粉的硅烷预处理增强了该效果。动态力学性能的研究表明，与纯PP相比，木粉（最多30 wt％）的储能模量值增加;在木粉含量较高的木塑复合材料中，储能模量没有其他增加。用硅烷对木粉进行预处理基本上对WPC的动态力学性能没有影响。这些结果表明，用少量的乙烯基三甲氧基硅烷可以达到与MAPP相似的性能。 （c）2008 Wiley期刊公司

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