CAJ | 학술논문

为了探究包覆结构的形成与剪切温度和基体分子量的关系，采用了等规聚丙烯（iPP）／玻璃纤维（GF）复合材料单纤维牵引体系。通过固定纤维牵引速率、逐步降低剪切温度（低于基体熔点）的方法，对实时采集的偏光显微镜图片进行了详细分析。结果表明：对于同一基体，包覆结构的厚度随剪切温度的升高而降低，且基体分子量越低，这一变化趋势越明显；对于同一剪切温度，包覆结构的厚度随基体分子量的增加而增大；形成包覆结构的最高剪切温度随基体分子量的增加而升高。
위료탐구포복결구적형성여전절온도화기체분자량적관계，채용료등규취병희（iPP）／파리섬유（GF）복합재료단섬유견인체계。통과고정섬유견인속솔、축보강저전절온도（저우기체용점）적방법，대실시채집적편광현미경도편진행료상세분석。결과표명：대우동일기체，포복결구적후도수전절온도적승고이강저，차기체분자량월저，저일변화추세월명현；대우동일전절온도，포복결구적후도수기체분자량적증가이증대；형성포복결구적최고전절온도수기체분자량적증가이승고。
The single fiber‐pulling system of isotactic polypropylene (iPP) /glass fiber composites was used to explore the rela‐tionship between the formation of coating structure and shearing temperature as well as matrix molecular weight .Based on the fixed fiber‐pulling speed and decreasing shearing temperature (just below the melting temperature) ,polarized optical micrographs could be analyzed in detail .The results revealed that for one iPP matrix ,the thickness of coating structure decreased with the in‐crease of shearing temperature ,and lower matrix molecular weight lead to a more obvious variation tendency .For one shearing temperature the thickness of coating structure increased with the increment of matrix molecular weight .Furthermore ,the maxi‐mum shearing temperature also enhanced with the addition of matrix molecular weight .This present work offers powerful and di‐rective evidence that shearing temperature and matrix molecular weight play important roles in the formation of coating structure .