Supercritical CO2 foaming of pressure-induced-flow processed linear polypropylene

Dajiong Fu; Feng Chen; Tairong Kuang; Dachao Li; Xiangfang Peng; Debbie Y. Chiu; Chiang Shiang Lin; Ly James Lee

doi:10.1016/j.matdes.2016.01.012

Supercritical CO₂ foaming of pressure-induced-flow processed linear polypropylene

Dajiong Fu, Feng Chen, Tairong Kuang, Dachao Li, Xiangfang Peng, Debbie Y. Chiu, Chiang Shiang Lin, Ly James Lee^*

^*Corresponding author for this work

Institute of Biopharmaceutical Sciences

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

Linear polypropylene is very difficult to foam due to its low melt strength and high crystallinity. Pressure-induced flow (PIF) has been demonstrated to be able to improve the foamability of linear PP under a very high pressure. In this study, we report a systematic evaluation to optimize PP foaming process using supercritical CO₂. PP was firstly processed by means of PIF at optimized conditions. For CO₂ foaming of PP, the effect of foaming pressure and saturation time was investigated in detail. A threshold foaming pressure of 13.8 MPa was found to be needed to achieve low-density foams. Comparing to commercially available EPP and high melt strength PP foams, the PIF PP foams possess much higher compressive strength and thermal stability at lower densities.

Original language	English
Pages (from-to)	509-513
Number of pages	5
Journal	Materials and Design
Volume	93
DOIs	https://doi.org/10.1016/j.matdes.2016.01.012
State	Published - 5 Mar 2016

Keywords

Foam
Polypropylene
Pressure induced flow
Supercritical CO

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10.1016/j.matdes.2016.01.012

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title = "Supercritical CO2 foaming of pressure-induced-flow processed linear polypropylene",

abstract = "Linear polypropylene is very difficult to foam due to its low melt strength and high crystallinity. Pressure-induced flow (PIF) has been demonstrated to be able to improve the foamability of linear PP under a very high pressure. In this study, we report a systematic evaluation to optimize PP foaming process using supercritical CO2. PP was firstly processed by means of PIF at optimized conditions. For CO2 foaming of PP, the effect of foaming pressure and saturation time was investigated in detail. A threshold foaming pressure of 13.8 MPa was found to be needed to achieve low-density foams. Comparing to commercially available EPP and high melt strength PP foams, the PIF PP foams possess much higher compressive strength and thermal stability at lower densities.",

keywords = "Foam, Polypropylene, Pressure induced flow, Supercritical CO",

author = "Dajiong Fu and Feng Chen and Tairong Kuang and Dachao Li and Xiangfang Peng and Chiu, {Debbie Y.} and Lin, {Chiang Shiang} and Lee, {Ly James}",

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T1 - Supercritical CO2 foaming of pressure-induced-flow processed linear polypropylene

AU - Fu, Dajiong

AU - Chen, Feng

AU - Kuang, Tairong

AU - Li, Dachao

AU - Peng, Xiangfang

AU - Chiu, Debbie Y.

AU - Lin, Chiang Shiang

AU - Lee, Ly James

PY - 2016/3/5

Y1 - 2016/3/5

N2 - Linear polypropylene is very difficult to foam due to its low melt strength and high crystallinity. Pressure-induced flow (PIF) has been demonstrated to be able to improve the foamability of linear PP under a very high pressure. In this study, we report a systematic evaluation to optimize PP foaming process using supercritical CO2. PP was firstly processed by means of PIF at optimized conditions. For CO2 foaming of PP, the effect of foaming pressure and saturation time was investigated in detail. A threshold foaming pressure of 13.8 MPa was found to be needed to achieve low-density foams. Comparing to commercially available EPP and high melt strength PP foams, the PIF PP foams possess much higher compressive strength and thermal stability at lower densities.

AB - Linear polypropylene is very difficult to foam due to its low melt strength and high crystallinity. Pressure-induced flow (PIF) has been demonstrated to be able to improve the foamability of linear PP under a very high pressure. In this study, we report a systematic evaluation to optimize PP foaming process using supercritical CO2. PP was firstly processed by means of PIF at optimized conditions. For CO2 foaming of PP, the effect of foaming pressure and saturation time was investigated in detail. A threshold foaming pressure of 13.8 MPa was found to be needed to achieve low-density foams. Comparing to commercially available EPP and high melt strength PP foams, the PIF PP foams possess much higher compressive strength and thermal stability at lower densities.

KW - Foam

KW - Polypropylene

KW - Pressure induced flow

KW - Supercritical CO

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U2 - 10.1016/j.matdes.2016.01.012

DO - 10.1016/j.matdes.2016.01.012

M3 - Article

AN - SCOPUS:84957798861

SN - 0264-1275

VL - 93

SP - 509

EP - 513

JO - Materials and Design

JF - Materials and Design

ER -

Supercritical CO₂ foaming of pressure-induced-flow processed linear polypropylene

Abstract

Keywords

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