全同聚丙烯SEM分析试样的制备及观察

Preparation and morphology observation of the SEM sample of isotactic polypropylene

用高锰酸钾溶液蚀刻方法制备全同聚丙烯(iPP)的SEM分析试样,观察iPP试样的球晶形貌,结果表明,经高锰酸钾溶液浸泡1h左右的iPP试样,SEM观察下可以获得细节清晰的球晶形貌,α-iPP球晶具有子母晶片结构,母晶片间的非晶组织被蚀刻后呈放射状腐蚀条纹,子、母晶片间的非晶部分被高锰酸钾溶液蚀刻后留下格子状的腐蚀坑。

The SEM sample of isotactic polypropylene（iPP） was prepared by means of kalii permanganate etching,and the spherulites morphology of the sample was observed with the SEM.It is found that the sample that has been steeped in the kalii permanganate solution for about 1 hour demonstrates clear spherulites morphology,and α-iPP spherulites have mother and daughter molecular structure.The amorphous parts between the mother molecules are etched into radiating stripes,and the amorphous parts between the mother and daughter molecules have grid pits on the surface after the etching.