Abstract: In situ Fourier transform infrared spectroscopy (FTIR) measurements were carried out to study the conformational changes during crystallization from molten isotactic polystyrene (iPS). The sample is melted and subsequently crystallized at a temperature, formed a well ordered spherulites with helix structure after an initial induction period. The later stage of the induction period, small ordered structure of helical moieties regarded as a sort of 31 helix with partially regular packing was identified. An increase of the melt temperature destroyed the longer helices in the crystal but the shorter helices can survive and form a cluster in the melt, initiated a primary nucleation site. The nucleation density was found to be a function of the survival shorter 31 helix.
Keywords: FTIR study / nucleation density / melt crystallization / isotactic polystyrene.
Title: Cluster Information of Melt Crystallized Isotactic Polystyrene by FTIR
Author: Al Mamun and Norimasa Okui
International Journal of Engineering Research and Reviews (IJERR)
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