摘要
为了了解木塑复合材料的动态流变特性,从而更好地提高产品的生产效率以及揭示界面复合机理,该文以竹粉/高密度聚乙烯(HDPE)复合材料为研究对象,分别考察了铝钛偶联剂、硬脂酸钙润滑剂对复合材料流变特性的影响。利用密炼机对高密度聚乙烯与竹粉进行密炼混合,在此过程中根据情况添加适量的偶联剂或润滑剂,得到的复合块状材料经冷却破碎后注塑成型,并对注塑试样进行了系列动态流变测试,包括应变扫描、频率扫描,对比了2种温度下的应变扫描下的流变行为。应变扫描结果表明,添加助剂的复合体系比单纯竹粉/HDPE体系在更大的应变范围内属于线性弹性行为,通过低频区域的模量与频率关系的斜率分析表明,添加偶联剂和润滑剂有助于促进竹粉在塑料基体中的均匀分散,动态黏度与损耗黏度之间的关系揭示了偶联剂以及润滑剂均在一定程度上促进了竹粉与聚乙烯塑料之间的界面结合,为木塑复合材料生产过程助剂的使用提供了一定的理论参考依据。
In order to explore dynamic rheological behavior of wood plastic composites,and to better improve the production efficiency and reveal interfacial interaction mechanism,the bamboo flour/high density polyethylene（HDPE） composite was selected to investigate the effects of aluminum-titanium coupling agent,and calcium stearate lubricant on the rheological behavior of composite.The composite was firstly compounded by internal mixer,and then made through injection molding.A series of dynamic rheological tests were conducted,which include the strain sweep,frequency sweep and strain sweep at different temperatures.Strain scanning results showed that addition of additives in bamboo flour/HDPE composites enlarged the stain range of the linear visco-elastic zone compared with the composites without additives.The correlation between the modulus and the slope of the frequency at the low frequency region indicated that adding coupling agents and lubricants could accelerate the dispersion of bamboo floor into polyethylene matrix.The relationship between dynamic viscosity and loss viscosity revealed that the interfacial adhesion between the bamboo powder and polyethylene could be enhanced,to a certain extent,by adding coupling agents and lubricants.The research can provide a reference for application of additives agent during wood plastic composites processing.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第7期288-292,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然基金项目(项目编号:30771683
31170535)
关键词
应变
温度
测试
竹粉
高密度聚乙烯
复合材料
动态流变特性
strain
temperature
testing
bamboo flour
high density polyethylene（HDPE）
composites
dynamic rheological properties
