Abstract: A PA6/hydrotalcite nanocomposite (PA6/MgAl-PMOBA-LDHs) was synthesized through in-situ polymerization. The property and structure of the resulted nanocomposite were characterized by TEM, UV spectrum, XRD, TG, and DSC, etc. The results indicated that the nano MgAl-PMOBA-LDHs uniformly dispersed in the matrix, and compared with pure PA6, the nanocomposite could strongly absorb the ultraviolet rays between 320~380 nm. XRD and DSC showed that a small amount of MgAl-PMOBA-LDHs played a good role in heterogeneous nucleation of PA6, and increased the crystallization temperature and crystallinity. The presence of a few exfoliated MgAl-PMOBA-LDHs had significantly contribute to the formation of gamma crystalline of PA6.

Key words: polyamide 6, hydrotalcite, nanocomposite, in-situ polymerization