| 纳米TiO2填充改性PP的力学性能研究 |
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| 引用本文： | 季光明,陶杰,汪涛,杨斌鹏.纳米TiO2填充改性PP的力学性能研究[J].复合材料学报,2005,22(5):100-106. |
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| 作者姓名： | 季光明 陶杰 汪涛 杨斌鹏 |
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| 作者单位： | 南京航空航天大学,材料科学与技术学院,南京,210016 |
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| 基金项目： | 江苏省自然科学基金资助项目（BK2004129）;企业合作项目 |
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| 摘 要： | 为了进一步提高通用塑料PP (聚丙烯) 的力学性能,采用共混方法制备了经钛酸酯偶联剂NDZ-201处理的纳米TiO2/PP复合材料,并通过对DSC熔融曲线的分析以及材料冲击破坏断口的形貌观察,研究了纳米TiO2质量分数和钛酸酯NDZ-201用量对PP的增韧、增强效果的影响。试验结果表明:纳米TiO2/PP复合材料的抗弯强度、抗弯模量和冲击强度随着纳米TiO2含量的升高明显提高,当含量超过5% 时,力学性能增势趋缓,并且随着纳米粒子含量的增加力学性能出现下降的趋势;纳米TiO2的加入提高了PP的结晶度,使PP结晶为较多细小的β晶,此外弥散分布的纳米TiO2粒子显著增加了裂纹扩展阻力;在纳米TiO2加入量一定的情况下,PP的力学性能与钛酸酯偶联剂NDZ-201用量呈近似抛物线的关系,当NDZ-201用量为2% 时对PP的增强增韧效果最显著。
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| 关 键 词： | TiO2 偶联剂 PP 纳米复合材料 |
| 文章编号： | 1000-3851（2005）05-0100-07 |
| 收稿时间： | 10 12 2004 12:00AM |
| 修稿时间： | 2004-10-122004-12-13 |
INVESTIGATION ON THE MECHANICAL PROPERTIES OF NANO-TiO2/PP COMPOSITES |
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| JI Guangming,TAO Jie,WANG Tao,YANG Bingpeng.INVESTIGATION ON THE MECHANICAL PROPERTIES OF NANO-TiO2/PP COMPOSITES[J].Acta Materiae Compositae Sinica,2005,22(5):100-106. |
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| Authors: | JI Guangming TAO Jie WANG Tao YANG Bingpeng |
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| Affiliation: | College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | In order to further improve the mechanical properties of commercial plastics polypropylene (PP), PP composite material incorporated with the surface-modified nano-TiO2 particles by titanium-acid ester coupling agent NDZ-201 was prepared through the blending method. The effect of the mass fraction of TiO2 and the dosage of NDZ-201 on the toughening and strengthening of PP matrix was investigated based on the results of the differential scanning calorimeter (DSC) and the observation of the impact fractography of the material. It was shown that the flexural strength, the modulus and the impact strength of the nanocomposite were obviously improved with the increasing of nano-TiO2 percentage (less than 5%); and the augment of the properties dropped and turned to a decreasing tendency with the further supplement of the nano-TiO2 content. It was also found that the addition of nano-TiO2 promoted the crystallization of PP, leading to a much more quantity of finer β grains. Moreover, the homogeneous dispersion of nano-TiO2 particles enhanced the obstruction to the cracks’ propagating in PP. It was indicated that the dosage of titanium-acid ester coupling agent had a parabola-like relation with the mechanical properties of nano-TiO2/PP composite at a fixed nano-TiO2 content, while the optimal toughening and strengthening effect could be achieved at 2% of NDZ-201. |
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| Keywords: | TiO2 coupling agent polypropylene nanocomposite |
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