Tough and strong polypropylene prepared by pressure-induced-flow processing: (I) mechanical properties,propagations of fractures and solvent barrier
The effect of pressure-induced-flow processing (PIF-processing) on the mechanical properties and solvent barrier for isotactic polypropylene (i-PP) was studied. Results showed that the impact strength, tensile strength and solvent barrier of the materials in two determined directions were markedly enhanced after PIF-processing, depending on the temperature and pressure during processing. AFM observations revealed the orientation of cracks along the interfaces of crystalline spherulites and lamellaes of the polymer near the fractured surface, which coincided with the SEM observations and were believed to be responsible for the improved mechanical performances. This preferred orientation of cracks or solvent propagations extended the total energy-dissipating paths or swelling paths within a specimen during breaking, resulting in much higher impact and tensile strength, as well as the solvent barrier. This simple way of enhancement might be used in many industrial applications of polymer materials.
HUAN Qian ZHU Shu ZHANG Sen MA Yu HAN Keqing YU Muhuo REITER Günter
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material
国际会议
2011 International Conference on Advanced Fibers and Polymer Materials(2011年先进纤维与聚合物材料国际会议 ICAFPM)
上海
英文
107-109
2011-08-15（万方平台首次上网日期，不代表论文的发表时间）