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1
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Gao X, Chen Y, Xu Z, Zhao L, Hu D. Supercritical CO 2 Foaming of Thermoplastic Polyurethane Composite: Simultaneous Simulation of Cell Nucleation and Growth Coupling in Situ Visualization. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiulu Gao
- State Key Laboratory of Chemical Engineering, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yichong Chen
- State Key Laboratory of Chemical Engineering, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhimei Xu
- State Key Laboratory of Chemical Engineering, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ling Zhao
- State Key Laboratory of Chemical Engineering, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Dongdong Hu
- State Key Laboratory of Chemical Engineering, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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2
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Yao S, Chen Y, Ling Y, Hu D, Xi Z, Zhao L. Analysis of Bubble Growth in Supercritical CO 2 Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation. Polymers (Basel) 2021; 13:polym13162799. [PMID: 34451336 PMCID: PMC8401983 DOI: 10.3390/polym13162799] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/14/2021] [Accepted: 08/18/2021] [Indexed: 11/16/2022] Open
Abstract
Bubble growth in the polymer extrusion foaming process occurs under a dynamic melt flow. For non-Newtonian fluids, this work successfully coupled the dynamic melt flow simulation with the bubble growth model to realize bubble growth predictions in an extrusion flow. The initial thermophysical properties and dynamic rheological property distribution at the cross section of the die exit were calculated based on the finite element method. It was found that dynamic rheological properties provided a necessary solution for predicting bubble growth during the supercritical CO2 polyethylene terephthalate (PET) extrusion foaming process. The introduction of initial melt stress could effectively inhibit the rapid growth of bubbles and reduce the stable size of bubbles. However, the initial melt stress was ignored in previous work involving bubble growth predictions because it was not available. The simulation results based on the above theoretical model were consistent with the evolution trends of cell morphology and agreed well with the actual experimental results.
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Affiliation(s)
- Shun Yao
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (S.Y.); (Y.C.); (Y.L.); (D.H.); (Z.X.)
| | - Yichong Chen
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (S.Y.); (Y.C.); (Y.L.); (D.H.); (Z.X.)
| | - Yijie Ling
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (S.Y.); (Y.C.); (Y.L.); (D.H.); (Z.X.)
| | - Dongdong Hu
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (S.Y.); (Y.C.); (Y.L.); (D.H.); (Z.X.)
| | - Zhenhao Xi
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (S.Y.); (Y.C.); (Y.L.); (D.H.); (Z.X.)
| | - Ling Zhao
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (S.Y.); (Y.C.); (Y.L.); (D.H.); (Z.X.)
- School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
- Correspondence:
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3
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Li D, Chen Y, Yao S, Zhang H, Hu D, Zhao L. Insight into the Influence of Properties of Poly(Ethylene-co-octene) with Different Chain Structures on Their Cell Morphology and Dimensional Stability Foamed by Supercritical CO 2. Polymers (Basel) 2021; 13:polym13091494. [PMID: 34066553 PMCID: PMC8125328 DOI: 10.3390/polym13091494] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 04/29/2021] [Accepted: 05/01/2021] [Indexed: 12/02/2022] Open
Abstract
Poly(ethylene-co-octene) (POE) elastomers with different copolymer compositions and molecular weight exhibit quite distinctive foaming behaviors and dimensional stability using supercritical carbon dioxide (CO2) as a blowing agent. As the octene content decreases from 16.54% to 4.48% with constant melting index of 1, both the melting point and crystallinity of POE increase, due to the increase in fraction of ethylene homo-polymerization segment. the foaming window of POE moves to a narrow higher temperature zone from 20–50 °C to 90–110 °C under 11 Mpa CO2 pressure, and CO2 solubility as well as CO2 desorption rate decrease, so that the average cell diameter becomes larger. POE foams with higher octene content have more serious shrinkage problem due to lower compression modulus, weaker crystal structure and higher CO2 permeability. As POE molecular weight increases at similar octene content, there is little effect on crystallization and CO2 diffusion behavior, the foaming window becomes wider and cell density increases, mainly owing to higher polymer melt strength, the volume shrinkage ratio of their foams is less than 20% because of similar higher polymer modulus. In addition, when the initiate expansion ratio is over 17 times, POE foams with longer and thinner cell wall structures are more prone to shrinkage and recovery during aging process, due to more bending deformation and less compression deformation.
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Affiliation(s)
- Dongyang Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (D.L.); (Y.C.); (S.Y.); (H.Z.); (D.H.)
| | - Yichong Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (D.L.); (Y.C.); (S.Y.); (H.Z.); (D.H.)
| | - Shun Yao
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (D.L.); (Y.C.); (S.Y.); (H.Z.); (D.H.)
| | - Hong Zhang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (D.L.); (Y.C.); (S.Y.); (H.Z.); (D.H.)
| | - Dongdong Hu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (D.L.); (Y.C.); (S.Y.); (H.Z.); (D.H.)
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ling Zhao
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (D.L.); (Y.C.); (S.Y.); (H.Z.); (D.H.)
- College of Chemical Engineering, Xinjiang University, Urumqi 830046, China
- Correspondence: ; Tel.: +86-21-64253175; Fax: +86-21-64253528
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5
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Yao S, Guo T, Liu T, Xi Z, Xu Z, Zhao L. Good extrusion foaming performance of long‐chain branched
PET
induced by its enhanced crystallization property. J Appl Polym Sci 2020. [DOI: 10.1002/app.49268] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Shun Yao
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and Technology Shanghai China
| | - Tianhao Guo
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and Technology Shanghai China
| | - Tao Liu
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and Technology Shanghai China
| | - Zhenhao Xi
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and Technology Shanghai China
| | - Zhimei Xu
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and Technology Shanghai China
| | - Ling Zhao
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and Technology Shanghai China
- College of Chemistry and Chemical Engineering Xinjiang University Urumqi China
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6
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Safety evaluation of different acids in high-density polyethylene container loading. J Loss Prev Process Ind 2020. [DOI: 10.1016/j.jlp.2019.103991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Chen Y, Wan C, Liu T, Chen Z, Qiao Y, Lu J, Yan J, Zhao L, Esseghir M. Evaluation of LLDPE/LDPE blend foamability by in situ rheological measurements and bubble growth simulations. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.07.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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Hu DD, Gu Y, Liu T, Zhao L. Microcellular foaming of polysulfones in supercritical CO2 and the effect of co-blowing agent. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2018.05.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bao L, Fang S, Hu D, Zong Y, Zhao L, Yuan W, Liu T. Stabilization of CO2-in-water emulsions by nonfluorinated surfactants with enhanced CO2-philic tails. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Yang Z, Xin C, Mughal W, Wang Z, Bai X, He Y. Prediction of foamability of polyethylene terephthalate using viscous and elastic parameters. ADVANCES IN POLYMER TECHNOLOGY 2017. [DOI: 10.1002/adv.21910] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhaoping Yang
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing China
| | - Chunling Xin
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing China
- Engineering Research Center for Polymer Processing Equipment; Ministry of Education; Beijing China
| | - Waqas Mughal
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing China
| | - Zeming Wang
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing China
| | - Xue Bai
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing China
| | - Yadong He
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing China
- Engineering Research Center for Polymer Processing Equipment; Ministry of Education; Beijing China
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Wan C, Lu Y, Liu T, Zhao L, Yuan W. Foaming of Low Density Polyethylene with Carbon Dioxide Based on Its in Situ Crystallization Behavior Characterized by High-Pressure Rheometer. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02842] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen Wan
- Shanghai Key Laboratory
of
Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yiquan Lu
- Shanghai Key Laboratory
of
Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Tao Liu
- Shanghai Key Laboratory
of
Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Ling Zhao
- Shanghai Key Laboratory
of
Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Weikang Yuan
- Shanghai Key Laboratory
of
Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
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12
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Enhancement of the CO2-philicity of poly(vinyl ester)s by end-group modification with branched chains. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2017.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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