CAJ | 학술논문

利用自行研制的连续纤维/热塑性树脂浸渍装置,制备了注塑成型用长玻璃纤维增强聚丙烯粒料.利用Charpy冲击试验,研究了界面相容剂(接枝马来酸酐聚丙烯)的用量、粒料长度等对注塑试样冲击韧性的影响.试验发现,随着接枝聚丙烯含量的增加,试样的冲击韧性显著提高.但当接枝聚丙烯含量达到一定程度时,冲击韧性反而下降.注塑试样的冲击韧性随长纤维粒料的长度增加和冲击试样模具的浇口尺寸变大而升高.对于平板材料,冲击试样所处的位置不同,其韧性也有较大的变化.试验还发现,退火处理可以有效地提高注塑试样的冲击韧性.
이용자행연제적련속섬유/열소성수지침지장치,제비료주소성형용장파리섬유증강취병희립료.이용Charpy충격시험,연구료계면상용제(접지마래산항취병희)적용량、립료장도등대주소시양충격인성적영향.시험발현,수착접지취병희함량적증가,시양적충격인성현저제고.단당접지취병희함량체도일정정도시,충격인성반이하강.주소시양적충격인성수장섬유립료적장도증가화충격시양모구적요구척촌변대이승고.대우평판재료,충격시양소처적위치불동,기인성야유교대적변화.시험환발현,퇴화처리가이유효지제고주소시양적충격인성.
Using an impregnation and pultrusion device developed at our laboratory, long glass fiber reinforced polypropylene pellets for injection molding were produced. Composites samples were molded with the pellets by a conventional injection machine. Factors affecting the impact toughness were studied by Charpy test. The impact toughness increased with the addition of grafted polypropylene at first, but it decreased slowly when the grafted polypropylene addition exceeded 5 %. Nevertheless, higher impact toughness was obtained with longer pellets and/or wider runner. As to molded planar samples, the impact toughness varied depending on the position where the sample was cut. Annealing was an effective method to improve the impact toughness.