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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characteristics of composites of high-crystalline cellulose with polypropylene: Effects of maleated polypropylene and cellulose content
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Preparation and characteristics of composites of high-crystalline cellulose with polypropylene: Effects of maleated polypropylene and cellulose content

机译：高结晶性纤维素与聚丙烯复合材料的制备和特性：马来酸化聚丙烯和纤维素含量的影响

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Binary composites of high-crystalline fibrous cellulose with polypropylene (PP) or maleic anhydride-grafted polypropylene (MAPP) were prepared by melt-mixing with different contents of cellulose from 0 to 60 wt%. Ternary composites of cellulose with PP and MAPP were also prepared to investigate the effects of MAPP as a compatibilizer between cellulose and PP. Scanning electron microscopy revealed that the addition of MAPP generates strong interactions between a PP matrix and cellulose fibers: All cellulose fibers are encapsulated by layers of the matrix and connected tightly within the matrix. Thus, the tensile strength and Young's modulus of MAPP-containing composites increase with an increase in MAPP and cellulose content, in contrast to the decrease in tensile strength of a PP-based binary composite with an increase in cellulose. Cellulose fibers act as a nucleating agent for the crystallization of PP, which is promoted by the addition of MAPP through an increase of the crystallization temperature of PP in the composite. Accordingly, both cellulose and MAPP facilitate the thermooxidative stability of PP composites in the following order: MAPP/cellulose > PP/MAPP/cellulose > PP/cellulose > PP. Relative water absorption increases with an increase in cellulose content, decreasing with the addition of MAPP. MAPP-containing cellulose composites have high potential for applications as environmentally friendly materials. (C) 2002 Wiley Periodicals, Inc. [References: 30]
机译：高结晶性纤维纤维素与聚丙烯（PP）或马来酸酐接枝的聚丙烯（MAPP）的二元复合材料是通过将纤维素含量从0到60 wt％的熔融混合熔融制备的。还制备了纤维素与PP和MAPP的三元复合材料，以研究MAPP作为纤维素和PP之间的增容剂的作用。扫描电子显微镜显示，添加MAPP会在PP基质和纤维素纤维之间产生强烈的相互作用：所有纤维素纤维都被基质层包裹并紧密连接在基质内。因此，与MAPP和纤维素含量的增加相比，含MAPP的复合材料的拉伸强度和杨氏模量增加，与纤维素增加的PP基二元复合材料的拉伸强度降低相反。纤维素纤维是PP结晶的成核剂，通过增加复合材料中PP的结晶温度，通过添加MAPP可以促进纤维素的结晶。因此，纤维素和MAPP均以以下顺序促进PP复合材料的热氧化稳定性：MAPP /纤维素> PP / MAPP /纤维素> PP /纤维素> PP。相对吸水率随纤维素含量的增加而增加，随MAPP的添加而降低。含MAPP的纤维素复合材料作为环保材料具有很高的应用潜力。 （C）2002 Wiley Periodicals，Inc. [参考：30]

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