钇化合物对聚丙烯/空心玻璃微珠复合材料性能的影响
Effects of Yttrium Compound on Properties of Polypropylene/Hollow Glass Beads Composites
吴湘锋 1李军伟 2杨治强 1刘峰 1许鑫华1
作者信息
- 1. 天津大学材料科学与工程学院,天津300072
- 2. 天津大学材料科学与工程学院,天津300072;天津城市建设学院材料科学与工程系,天津300084
- 折叠
摘要
采用化学沉积法以六水硝酸钇对空心玻璃微珠的表面进行改性,利用力学性能测试仪、流变仪、差热扫描量热仪、X射线衍射仪等设备评估了该稀土化合物对聚丙烯/空心玻璃微珠复合材料的力学强度、流变性能、结晶性能和晶型结构的影响.实验结果表明:硝酸钇能明显改善复合材料的界面相容性,随着改性液中六水硝酸钇浓度的增加,复合材料的力学强度呈现先增加后降低的趋势,最佳质量分数为0.5％；同时,当复合材料中空心玻璃微珠的填充量为20％时,与空心玻璃微珠未改性相比,改性后复合材料的拉伸强度、冲击强度和结晶温度分别提高了38.5％、33.8％和4.2℃；此外,该改性剂具有成核作用,可促进聚丙烯β型晶的形成.
Abstract
Yttrium trinitrate hexahydrate was used as a surface modifier to treat hollow glass beads via a process of chemical deposition, and the mechanical strength, rheological properties, crystallinity and crystal structure of polypropylene/hollow glass beads composites were assessed by the testers for mechanical properties, rheometer, differential scanning calorimeter and X-ray diffractometer, respectively. The experimental results showed that the interfacial compatibility of the composites was obviously improved after hollow glass beads were modified, and the mechanical properties firstly increased and then decreased with the increase of the mass fraction of this modifier. It was found that the optimum mass fraction of this modifier was 0.5%. Moreover, when the treated beads loading was 20%, the tensile strength, impact strength and the crystallization temperature of the composites were increased by 38.5%, 33.8% and 4.2 °C, respectively, compared with those of the composites which were blended with other mass fractions of beads. The results also showed that the modifier had nucleating effects on the matrix and promoted the formation of β-crystals of polypropylene.
关键词
聚丙烯/空心玻璃微珠/表面改性/六水硝酸钇Key words
polypropylene/hollow glass bead/surface treatment/yttrium trinitrate hexahydrate引用本文复制引用
出版年
2012
NETL
NSTL
维普
万方数据