Impacts of Carbonaceous Particulates on Extrudate Semicrystalline Polyethylene Terephthalate Foams: Nonisothermal Crystallization, Rheology, and Infrared Attenuation Studies

Junjie Pan, Dan Zhang, Min Wu, Shilun Ruan, Jose M. Castro, L. James Lee, Feng Chen*

*此作品的通信作者

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

Carbonaceous micro-/nanoparticles are efficient infrared attenuation agents which may enhance the thermal insulation properties of polymeric foams by reducing the radiation heat transfer. The effects of low-concentration (≤0.5 wt %) multiwalled carbon nanotubes and micrographite (mGr) on the extrusion foaming of semicrystalline polyethylene terephthalate were investigated in this study. It is shown that the heterogeneous nucleation induced by the carbonaceous particulates would greatly affect the nonisothermal crystallization behavior during extrusion foaming. The rheology test results revealed that the melt strength of CPET composites was low above 235 °C but radically increased when the melt cooled down because of fast crystallization. Consequently, this phenomenon was beneficial to the cell growth and expansion at high melt temperatures because the increased melt viscosity could stabilize the cellular structure during the quenching stage. CPET/carbonaceous particulate composite foams showed high crystallinity, excellent IR absorption, and enhanced thermal insulation properties.

原文English
頁(從 - 到)15586-15597
頁數12
期刊Industrial and Engineering Chemistry Research
59
發行號35
DOIs
出版狀態Published - 2 9月 2020

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