碳酸钙在复合改性中的应用

无机填料碳酸钙在聚丙烯复合体系中的应用,研究了碳酸钙的加入对聚丙烯光学性能、分散性、力学性能中的冲击强度的影响,同时深入分析了无机填料对聚丙烯复合体系的增强增韧机理。     

无机填料改性聚丙烯复合材料的流变学研究进展

综述了近几年国内外无机填料改性聚丙烯复合材料流变学行为的研究进展,为无机填料改性聚丙烯复合材料流变学研究提供了参考;并展望了流变学研究在无机改性聚丙烯复合材料中的应用前景。     

β成核剂与无机填料对聚丙烯力学性能的影响

无机填料可以提高聚丙烯的刚性、硬度、抗化学性、尺寸稳定性和气体阻隔性,同时减少聚合物的用量,降低产品成本。滑石粉和碳酸钙是聚丙烯复合材料中大量使用的两种填料。主要研究β成核剂和无机填料对聚丙烯成核效应的协同作用,考察经β成核剂FB-1分别与无机填料滑石粉和碳酸钙共同改性的聚丙烯力学性能。     

无机组合粒子/聚丙烯复合材料的改性研究

选用纳米碳酸钙、滑石粉、玻璃微珠作为无机填料,研究了三元复配填料填充对聚丙烯复合材料性能的影响。通过对复合材料熔体指数、力学性能以及形态结构的比较,探讨了无机组合粒子级复配共混的协同效应。结果表明:无机复配填料能够产生一定的协同效应,提高聚丙烯复合材料的综合性能。     

β成核剂与无机填料对聚丙烯力学性能的影响

无机填料可以提高聚丙烯的刚性、硬度、抗化学性、尺寸稳定性和气体阻隔性,同时减少聚合物的用量,降低产品成本。滑石粉和碳酸钙是聚丙烯复合材料中大量使用的两种填料。主要研究β成核剂和无机填料对聚丙烯成核效应的协同作用,考察经β成核剂FB-1分别与无机填料滑石粉和碳酸钙共同改性的聚丙烯力学性能。     

钛酸酯偶联剂改性无机填料及其在聚丙烯复合材料中的应用

钛酸酯偶联剂改性的无机填料应用于聚丙烯复合材料，可以改善材料性能，扩大应用领域。概述了钛酸酯偶联剂改性的无机填料在不同种类的聚丙烯复合材料中的应用，以及对复合材料力学性能和阻燃性的影响。     

聚丙烯复合材料研究进展

按照增强材料和填充材料的不同,对聚丙烯复合材料的研究进展进行综述,主要介绍了玻纤增强聚丙烯复合材料、天然纤维/聚丙烯复合材料和无机填料/聚丙烯复合材料。     

无机成核剂对等规聚丙烯结晶的影响

论述了无机类成核剂滑石粉、碳酸钙、云母、硅灰石、玻璃微珠和二氧化硅以及其他无机填料对等规聚丙烯(IPP)结晶的影响,并总结了无机填料作为α-成核剂或者β成核剂对PP性能的影响。     

聚丙烯复合材料光老化研究进展

综述了国内外近年来聚丙烯复合材料光老化研究方面的进展,并着重讨论了硅酸盐类无机填料以及多种纳米填料,天然纤维,高聚物共混组分,稳定助剂以及染色剂等对聚丙烯光老化的影响及其机理。     

电镀级聚丙烯树脂的研制

采用无机填料制备电镀级聚丙烯树脂，通过对填料的颗粒形状，粒径大小，分布及填料量进行合理调控，使改性后的聚丙烯树脂具有可电镀性，镀层外观平坦光亮，剥离强度符合ＧＢ５９３３标准第２．６款。     

聚丙烯合成纸的研制

本文用内部纸化法研制出了ＰＰ合成纸。同时研究了填料、助剂对ＰＰ合成纸性能的影响。     

PP／mPE／无机填料三元复合材料的形态结构和力学性能

采用刚性无机填料对茂金属聚乙烯（mPE)弹性体增韧聚丙烯（PP）二元共混体系进行增强，从而制得PP／mPE无机填料三元复合材料。分别探讨了CaCO3用量对复合材料拉伸性能和低温冲击性能影响，并考察了不同填料的增强效果。实验结果表明，由于弹性体的存在，无机填料的增强作用减弱；共混物的低温冲击强度也因填料的加入而大幅度下降，但经过表面处理的高岭土体系的冲击强度反而提高。SEM断裂形貌显示，未经表面处理的填料和基体的界面结合较弱，而改性高岭土则以层状结构分散于基体中，并呈现牢固的界面结合。     

Thermal conductivity of polypropylene composites with hybrid fillers of boron nitride and vapor‐grown carbon fiber

High thermal conductivity fillers of boron nitride (BN) and vapor‐grown carbon fiber (VGCF) were used alone or incorporate to prepare polypropylene (PP) composites. The effects of filler content, particle size and shape, and single vs. hybrid BN/VGCF fillers were investigated with respect to the thermal conductivity of the PP composites. The thermal conductivity of PP/BN composites depended upon the content and particle size of the BN. Increased content and length of VGCF had the effect of increasing the thermal conductivity of the PP composites. Hybrid fillers were created with a mixture of medium‐sized BN and long‐length VGCF; hybrid BN/VGCF fillers enhanced the thermal conductivity of PP composites with a lower total content compared with PP composites containing only medium‐sized BN particles. POLYM. COMPOS., 37:936–942, 2016. © 2014 Society of Plastics Engineers     

Mechanical,Thermal and Electrical Resisitivity Properties of Thermoplastic Composites Filled with Carbon Fibers and Carbon Particles

Composites consisting of carbon fibers (CF) and carbon particles (CP) in polypropylene (PP) matrix were melt-compounded. Composites were analyzed for their mechanical, electrical and thermal properties. Results indicate that the addition of these fillers improved the mechanical properties of the composites. Thermal conductivity was enhanced as the concentration of fillers was increased. Carbon fibers render the composites electrically conductive so we observed a percolation threshold near 10 wt.% of CF for PP/CF (PP and CF composite) and near 25 wt.% of CP for PP/CP (PP and carbon particle composite). All the results indicated that carbon fibers are more effective in improving the properties as compare to the carbon particles.     

熔融共混法制备POE/PP热塑性弹性体

用熔融共混法制得了聚烯烃类弹性体（POE）／PP共混体系，研究了不同橡塑比对体系力学性能的影响；考察了不同填料（CaCO3，滑石粉．炭黑）对POE／PP复合材料性能的影响。结果表明：在共混比为60／40-70／30时，体系的综合性能较佳。加入的填料均使材料的拉伸强度和拉断伸长率下降，硬度上升。     

高抗冲高刚性EPDM改性聚丙烯的研究

加入超细改性无机刚性粒子提高三元乙丙橡胶(EPDM)的硬度，再与聚丙烯(PP)进行共混。研究了超细改性无机刚性粒子用量对EPDM硬度及流动性的影响，比较了PP与不同硬度EPDM的共混物在力学性能上的差异。结果表明：随着EPDM硬度的增加，共混物不仅韧性提高，弯曲模量也大幅度上升。选择合适的硬度，可制得高抗冲高刚性的EPDM改性PP共混材料。     

Comparative study on electrical properties of copper nanowire/polypropylene and carbon nanotube/polypropylene composites

Nanocomposites using copper nanowires (CuNWs) or carbon nanotubes (CNTs) as fillers with polypropylene (PP) as matrix were prepared by miscible solution mixing and precipitation method. Comparative studies on electrical conductivity and electromagnetic interference shielding properties were reported. On the conductivity curve, a plateau was found for both CuNW/PP composite and CNT/PP composite. The plateaus are located at a different concentration range for each composite type: for CuNW/PP composite, it is between 0.8 and 1.7 vol %, while for CNT/PP composite the plateau occurs in a narrower range between 0.4 and 0.6 vol %. The shielding effectiveness (SE) increases with increased concentration of fillers. CNT/PP composite has higher SE at concentrations less than 2 vol %; the two curves cross near 10 dB at this point and at concentrations higher than 2 vol %, CuNW/PP composite has higher SE. © 2014 American Institute of Chemical Engineers AIChE J, 61: 296–303, 2015     

Study on cellulose and xylan filled polypropylene composites

The thermal and viscoelastic properties of polypropylene (PP)/cellulose as well as PP/Xylan composites were investigated by differential scanning calorimetry (DSC) and dynamic mechanical thermoanalysis (DMTA). Morphological aspects were available by using polarizing light microscopy and scanning electron microscopy (SEM). Three types of fillers were incorporated in PP: xylan fillers (XL), cellulose microfibers (CM) and short fibers of spun cellulose (CS). The compatibilizer maleic anhydride modified PP (MAPP) was added to the composites. The crystallization temperature and crystallinity of PP apparently increased in the presence of all fiber types. The cellulose fiber surfaces act as nucleating agents for PP, resulting in the formation of transcrystalline regions around the fibers. The DMTA spectra of PP/filler composites revealed a significant increase in the stiffness and a remarkable decrease of the damping values. This effect was stronger for PP/CS than for the other composites. The results verify that improved compatibility and interfacial adhesion between fiber and matrix markedly contribute to an improvement of the mechanical properties. Received: 30 October 1997/Revised version: 11 December 1997/Accepted: 12 December 1997     

炭黑/白炭黑双相填料补强BIIR/PP热塑性弹性体的性能研究

通过动态硫化工艺制备了溴化丁基橡胶（BIIR）/聚丙烯（PP）热塑性弹性体,研究了加工时间、填料、硫化剂对弹性体力学性能的影响。结果表明,动态硫化制备热塑性弹性体的时间约为13 min;使用炭黑N330/白炭黑双相填料的热塑性弹性体具有较好的力学性能;在氧化锌、硫磺、溴化辛基酚醛树脂及硫磺/溴化辛基酚醛树脂并用硫化体系中,溴化辛基酚醛树脂硫化的热塑性弹性体力学性能最佳。     

Comparison of the mechanical properties and interfacial interactions between talc,kaolin, and calcium carbonate filled polypropylene composites

Three types of mineral fillers—talc, calcium carbonate (CaCO₃), and kaolin (10–40 wt % filler loadings)—were compounded with polypropylene (PP) with a twin‐screw extruder. The composites were injection‐molded, and the effects of the filler loading on the mechanical, flow, and thermal properties for the three different types of filled composites were investigated. The aim was to compare their properties and to deduce prospective filler combinations that would yield hybrid PP composites in following studies. The results showed that in most cases, the strength and stiffness of the talc‐filled PP composites was significantly higher than those of the CaCO₃‐ and kaolin‐filled PP composites. However, CaCO₃, being a nonreactive filler, increased the toughness of PP. The kaolin‐filled PP composites also showed some improvement in terms of strength and stiffness, although the increases in these properties were not as significant as those of the talc‐filled PP composites. The effects of interfacial interactions between the fillers and PP on the mechanical properties were also evaluated with semiempirical equations. The nucleating ability of all three fillers was studied with differential scanning calorimetry, and the strongest nucleating agent of the three was talc, followed by CaCO₃ and kaolin. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3315–3326, 2004