酸刻蚀玻璃纤维增强等规聚丙烯(iPP) 复合材料的界面结晶形态

Interfacial morphology of acid corroded glass fiber / isotactic polypropylene

  • 摘要: 将在稀酸溶液中刻蚀不同时间的玻璃纤维(GF)添加到等规聚丙烯(iPP)基体中制得GF/iPP复合材料。通过偏光显微镜研究了刻蚀不同时间的GF对界面结晶形态的影响。结果表明, 在刻蚀4 h的GF增强iPP复合材料中, GF表面在结晶初期诱导iPP基体生成独特的环带状晶核, 并在此晶核上可以进一步诱导生成β横晶。此外, 该复合材料在142 ℃等温结晶的结果进一步说明了刻蚀4 h的GF对基体的异相成核作用具有二元性, 即同时具有β成核和α成核的能力。

     

    Abstract: The glass fiber (GF) was corroded in the diluted acid solution for different times, and subsequently the GF/isotactic polypropylene (iPP) composites were prepared. The effects of the acid corroded GF on the interfacial morphology of GF/iPP composites were studied via the polarized optical microscope. The result show that the GF corroded for 4 h exhibits the nucleation ability to form novel banded nuclei in the early stage of the crystallization, and the β-transcrystallinity can be developed from these nuclei finally. In addition, the isothermal crystallization at 142 ℃ of this composite shows that GF corroded by acid for 4 h has nucleating duality towards matrix, viz., it has both β nucleation ability and α nucleation ability.

     

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