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

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。

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.