核心期刊网首页> 中文期刊> 基础科学

Effect of unsaturated hydroxyl-fatty acid modified nano-CaC03 on the morphological and rheological behavior of PP


A modified nano-calcium carbonate (R-CCR)was prepared by coating a layer of unsaturated hydroxyl-fatty acid on the surface of CCR powders using a solid state method; the latter were commercial nano-CaCO3 modified with stearic acid. FTIR studies indicate that the modifier is combined on the surface of CaCO3.PP/EPDM/nano-CaCO3 ternary composites were prepared by a melt-mixing method. SEM and TEM were utilized to examine the morphology of the composites. The tensile fractured surface of PP/EPDM/R-CCR showed a fibroid morphology and large-scale yield deformation. The impact fractured surface showed that the amount of cavities in the PP/EPDM/R-CCR system was increased, however their size diminished obviously. R-CCR particles were dis-persed uniformly in the PP matrix, and their compatibility was distinctly improved as compared to CCR when the amount of R-CCR was 15 h-1. The tensile strength remained nearly constant (reduced from 27.6MPa to 27.5 Mpa), while the impact strength increased from 9.6 kJ/m2 to 15.4 kJ/m2 as CCR was replaced by R-CCR.Meanwhile, the bending strength and bending modulus also increased correspondingly. Furthermore, the impact strength of PP/EPDM/R-CCR was maintained at a high level (15.4 kJ/m2), which was more than the sum of that of PP/EPDM and PP/R-CCR (6.6kJ/m2 and 6.1 kJ/m2respectively). This indicates that the R-CCR and EPDM have a significant synergistic toughening effect on PP while maintaining the strength and modulus of virgin PE Both the storage modulus G' and loss modulus G' of PP/EPDM and PP/EPDM/R-CCR composites increase with increasing frequency, but the values of G' and G' of the tertiary composite are relatively higher than those of the binary system. The loss factor and viscosity decrease with increasing frequency, but there is little difference between tertiary and' binary composites. The apparent viscosity η of the tertiary system containing R-CCR islower than that of the tertiary system containing CCR and virgin PE The viscosity of the composites sig-nificantly decreases with increasing shear rate. The mea-sured mechanical properties of the composites indicate that replacing CCR with R-CCR for binary composites could simultaneously enhance the toughness and strength of PP.......

【作者名称】: Ju GU, Qiang XIONG, Demin JIA, Yuanfang Luo, Rongshi Cheng
【作者单位】: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
【关 键 词】: Effect of unsaturated hydroxyl-fatty acid modified nano-CaC03 on the morphological and rheological behavior of PP
【期刊名称】: 中国高等学校学术文摘·化学
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 105,648,726
【摘要长度】: 2,249
【上篇论文】: 中文期刊 - 用迭加法求空间被平面分割的区域数
【下篇论文】: 中文期刊 - The mechanisms and correlated morphological character of the egg attachment of the swimming crab Portunus trituberculatus 三疣梭子蟹卵附着机制及相关形态学特征

【论文下载】: 免费获取 该期刊&论文全文内容