Hwang, JH Kim, WN Jun, JH Kwak, SJ Hwang, SS Hong, SM 2024-01-21T04:08:26Z 2024-01-21T04:08:26Z 2021-09-02 2005-11 0379-153X https://pubs.kist.re.kr/handle/201004/136020 This study investigates the isothermal crystallization behaviors of polypropylene-polyethylene-(1-butene) terpolymer and the adiabatically expanded polyolefin structured foams. For this purpose, butane gas was used as a physical blowing agent. Avrami equation has been used to interpret theoretically the experimental results obtained by either DSC or polarized optical microscope. It is believed that elongation induced crystallization occurring during the adiabatic expansion process has resulted in an increase in crystallization rate, eventually leading to a faster growth rate of spherulites and an increase in the nucleation density. An analysis of the foam by SEM images showed that the structure of foam is uniform (below diameter 30 mu m, closed cell) In addition, the thermal conductivity and the compressive strength of the polyolefin structured foams was measured. The thermal conductivity of foamed resin with excellent insulation characteristics is reduced compared with unfoamed resin. The compressive strength is decreased with increase in the expansion ratio. Korean POLYMER SOC KOREA CRYSTALLIZATION KINETICS THERMAL-CONDUCTIVITY NUCLEATION SULFIDE) MELT A study on the characteristics of the adiabatically expanded polyolefin structured foams Article 1 POLYMER-KOREA, v.29, no.6, pp.605 - 612 POLYMER-KOREA 29 6 605 612 scie scopus kci ART000978033 000233688600013 2-s2.0-33645361727 Polymer Science Polymer Science Article CRYSTALLIZATION KINETICS THERMAL-CONDUCTIVITY NUCLEATION SULFIDE) MELT crystallization adiabatic expansion elongation induced crystallization thermal conductivity closed cell