Investigation on β‐polypropylene/PP‐g‐MAH/ surface‐treated calcium carbonate composites
Investigation on β‐polypropylene/PP‐g‐MAH/ surface‐treated calcium carbonate composites
复制标题
β-聚丙烯/PP-g-MAH/表面处理碳酸钙复合材料的研究
DOI：
10.1002/pc.22370
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Q. Dou
中科院分区：
文献类型：
--
作者：
Jiawei Duan;Q. Dou
以钛酸酯偶联剂（T-CaCO3）和马来酸酐接枝PP （PP-g- mah）为原料，采用熔融复合法制备了含碳酸钙的β-聚丙烯复合材料。采用差示扫描量热法、广角x射线衍射、偏振光显微镜、扫描电镜和力学性能测试等手段研究了复合材料的结晶、形貌和力学性能。结果表明，T-CaCO3和NT-C均能诱导β-相的形成，NT-C使PP的β含量大幅增加，球团尺寸减小，PP-g- mah有利于β-相PP的形成，提高了T-CaCO3与PP的相容性，β-PP/T-CaCO3复合材料的缺口冲击强度高于PP/T-CaCO3复合材料，表明T-CaCO3与β-PP具有协同增韧作用。当T-CaCO3浓度低于5 wt%时，β-PP/T-CaCO3复合材料中加入PP-g- mah进一步增加了β-结晶PP的含量，提高了冲击强度和拉伸强度。用Jeziorny's和Mo's方法描述了β-PP复合材料的非等温结晶动力学。发现NT-C和T-CaCO3能加速PP的结晶速率，而PP-g- mah对β-PP复合材料结晶速率的影响很小。变异较大。心神。, 2012年。©2012塑料工程师协会
β-Polypropylene composites containing calcium carbonate treated by titanate coupling agent (T-CaCO3) and maleic anhydride grafted PP (PP-g-MAH) were prepared by melt compounding. The crystallization, morphology and mechanical properties of the composites were investigated by means of differential scanning calorimetry, wide-angle X-ray diffraction, polarized light microscopy, scanning electron microscopy and mechanical tests. It is found that both T-CaCO3 and NT-C are able to induce the formation of β-phase, and NT-C greatly increases the β content and decreases the spherulitic size of PP. PP-g-MAH facilitates the formation of β-form PP and improves the compatibility between T-CaCO3 and PP. Izod notched impact strength of β-PP/T-CaCO3 composite is higher than that of PP/T-CaCO3 composite, indicating the synergistic toughening effect of T-CaCO3 and β-PP. Incorporation of PP-g-MAH into β-PP/T-CaCO3 composite further increases the content of β-crystal PP and improves the impact strength and tensile strength when T-CaCO3 concentration is below 5 wt%. The nonisothermal crystallization kinetics of β-PP composites is well described by Jeziorny's and Mo's methods. It is found that NT-C and T-CaCO3 accelerate the crystallization rate of PP but the influence of PP-g-MAH on crystallization rate of β-PP composite is marginal. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers