CAJ | 학술논문

采用单轴压缩试验分别对空心玻璃微珠( HGB)和丁腈橡胶粉末( PNBR)填充的聚丙烯( PP)复合材料进行压缩性能和吸能特性研究,通过测定基于摆锤冲击试验的冲击韧性对材料的吸能能力进行验证,并采用扫描电子显微镜观察材料的微观形貌. 结果表明:空心玻璃微珠增加聚丙烯的刚度并降低延展性,粉末丁腈橡胶减小聚丙烯的刚度并提高延展性;吸收相同能量时,粉末丁腈橡胶/聚丙烯体系产生的应力响应最小;根据吸能效率,空心玻璃微珠/聚丙烯体系的设计应力应高于粉末丁腈橡胶/聚丙烯体系;理想吸能效率的最大值出现在相对平缓的屈服阶段;冲击试验结果证明空心玻璃微珠和粉末丁腈橡胶都能改善聚丙烯的吸能特性.
채용단축압축시험분별대공심파리미주( HGB)화정정상효분말( PNBR)전충적취병희( PP)복합재료진행압축성능화흡능특성연구,통과측정기우파추충격시험적충격인성대재료적흡능능력진행험증,병채용소묘전자현미경관찰재료적미관형모. 결과표명:공심파리미주증가취병희적강도병강저연전성,분말정정상효감소취병희적강도병제고연전성;흡수상동능량시,분말정정상효/취병희체계산생적응력향응최소;근거흡능효솔,공심파리미주/취병희체계적설계응력응고우분말정정상효/취병희체계;이상흡능효솔적최대치출현재상대평완적굴복계단;충격시험결과증명공심파리미주화분말정정상효도능개선취병희적흡능특성.
The compressive properties and energy absorption properties of polypropylene ( PP) composites filled with hollow glass beads (HGB) and powdered nitrile butadiene rubber (PNBR) respectively were studied by uniaxial compression tests. The energy absorption capacity of the studied materials was verified by impact toughness based on pendulum impact tests. Scanning electron microscopy was used to observe the microstructure of the fracture surfaces. It is found that HGB increases the stiffness but lowers the ductility of polypropylene, while PNBR is on the contrary. The stress response degree of PNBR/PP is the lowest as absorbing the same energy. The design stress of HGB/PP should be higher than that of PNBR/PP according to energy-absorption efficiency. The maximum value in the ideal energy-absorption efficiency curve occurs at the yield stage. Impact test results show that HGB and PNBR can improve the energy-absorption capability of polypropylene.