The Role of Crosslinks in PDMS Crystallization Enhancement Conference Paper uri icon

abstract

  • We have recently examined the crystallization behavior of physically and chemically crosslinked semicrystalline polymer, polydimethylsiloxane (PDMS) by means of calorimetry. Comparison of the thermograms obtained at constant cooling/heating rates with their non- crosslinked analogues indicates that contrary to conventional wisdom, the different types of crosslinks result in an increased crystallization tendency. We suggested that the effect is a manifestation of the enhancement of local ordering together with reduced dynamics as compared to the non cross-linked melt [T. Dollase, HW Spiess, M. Gottlieb and R. Yerushalmi-Rozen, Europhys. Lett., 60, 390, 2002]. In this work we report on the study of the dynamics of crystallization in crosslinked system and on the dynamics of polymer chains in crosslinked systems. Our results support our previous contention that crystallization …

publication date

  • January 1, 2003