Epitaxial act of sodium 2,2 '-methylene-bis-(4,6-di-t-butylphenylene) phosphate on isotactic polypropylene

Sodium 2,2 ' -methylene-bis-(4,6-di-t-butylphenylene)phosphate(NA-11) is wi dely used as a nucleating agent in the processing of isotactic polypropylen e(iPP). To reveal its act as the nucleating agent on iPP, the crystallizati on behavior of NA-11 on isotactic polypropylene was investigated. NA-11 was crystallized on the oriented, thin iPP film from the solution in dimethyfo rmamide at various temperatures. iPP was also crystallized from the melt on NA-11 crystals grown from ethanol. The samples thus prepared were examined by electron microscopy. NA-11 epitaxially crystallized on the iPP substrat e at high temperatures, performing the crystallographical relationship, [01 0](NA-11)//[001](ipp) and (001)(NA-11)//(010)(ipp), and iPP on the NA-11 cr ystals with the same orientational relationship. (C) 2001 Elsevier Science Ltd. All rights reserved.