Seo, Yongsok Kang, Taejin Hong, Soon Man Choi, Hyoung Jin 2024-01-21T01:01:51Z 2024-01-21T01:01:51Z 2021-09-02 2007-06 0032-3861 https://pubs.kist.re.kr/handle/201004/134361 The nonisothermal crystallization kinetics of a polyolefin terpolymer (poly(propylene-co-ethylene-co-l-butene) and its expanded foam was investigated by differential scanning calorimetry. A kinetic equation for nonisothermal crystallization was employed to analyze the crystallization characteristics of the terpolymer and its foam. The Avrami exponent, n, can be reasonably well determined from the nonisothermal crystallization exotherm. The polarized optical microscopy showed that pristine terpolymer had a well-developed spherulite morphology whereas the foamed terpolymer consisted of elongated entities that subsequently developed as more bundle-like entities. The latter morphology is typical one of the gamma phase. The difference in crystallization behavior observed for the pristine and foamed terpolymer samples is attributed to the formation of different morphologies during the foam expansion process. (c) 2007 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD Nonisothermal crystallization behaviors of a polyolefin terpolymer and its foam Article 10.1016/j.polymer.2007.04.024 1 POLYMER, v.48, no.13, pp.3844 - 3849 POLYMER 48 13 3844 3849 N scie scopus 000248842600029 2-s2.0-34249915564 Polymer Science Polymer Science Article FLOW-INDUCED CRYSTALLIZATION ISOTACTIC POLYPROPYLENE KINETICS COPOLYMERS PROPYLENE PHASE FORM nonisothermal crystallization terpolymer nucleation