CAJ | 학술논문

采用扫描电子显微镜-X射线能谱仪跟踪硅烷偶联剂中Si元素在高密度聚乙烯(HDPE)基竹塑共混体系界面处的分布,并结合旋转流变仪研究了共混体系加工过程中的界面演变过程.发现随着加工时间的延长,界面处Si元素的含量相对增加,体系的动态模量、黏度升高.表明偶联剂连接的竹粉与HDPE分子链间的相互作用增强,界面层厚度增加.共混体系的动态流变测试结果表明,竹粉填充体系在低频末端区的线性黏弹行为显著不同于HDPE基体,表现出"类固体"特性,动态流变测试对偶联剂的加入所引起的体系的黏弹行为及结构变化响应较敏感.Cole-Cole曲线可反映竹粉粒子网络结构及竹粉与HDPE基体界面相关的松弛信息,体现体系界面性质及竹粉与分子链间网络结构的变化.
채용소묘전자현미경-X사선능보의근종규완우련제중Si원소재고밀도취을희(HDPE)기죽소공혼체계계면처적분포,병결합선전류변의연구료공혼체계가공과정중적계면연변과정.발현수착가공시간적연장,계면처Si원소적함량상대증가,체계적동태모량、점도승고.표명우련제련접적죽분여HDPE분자련간적상호작용증강,계면층후도증가.공혼체계적동태류변측시결과표명,죽분전충체계재저빈말단구적선성점탄행위현저불동우HDPE기체,표현출"류고체"특성,동태류변측시대우련제적가입소인기적체계적점탄행위급결구변화향응교민감.Cole-Cole곡선가반영죽분입자망락결구급죽분여HDPE기체계면상관적송이신식,체현체계계면성질급죽분여분자련간망락결구적변화.
The interface evolution of high density polyethylene(HDPE)/bamboo flour composites processing were investigated through tracking the distribution of silicon with scanning electronic microscope-X-ray energy dispersive spectrometer(SEM-EDS),and evolution of interface was studied during the process of blending system combining with rotational rhemometer. It is founded that the content of interface silicon and dynamic modulus and viscosity increase with processing time. These phenomena reflect the increase of interaction between bamboo flour and HDPE molecular-chains and interface layer thickness. The rheological results show that viscoelastic behavior of blends are significantly different from that of HDPE matrix at lower frequency and exhibit the"solid-like"rheological behavior. It is suggested that dynamic rheological testing is sensitively response for the changes in morphologies and viscoelastic behavior of blends which resulted by the addition of silicon coupling agent. The relaxation information about interface evolution and interaction between bamboo flour and matrix can be characterized by Cole-Cole curve.