Antishrinking Strategy of Microcellular Thermoplastic Polyurethane by Comprehensive Modeling Analysis

被引:42
作者
Chen, Yichong [1 ]
Li, Dongyang [1 ]
Zhang, Hong [1 ]
Ling, Yijie [1 ]
Wu, Kaiwen [1 ]
Liu, Tao [1 ]
Hu, Dongdong [1 ]
Zhao, Ling [1 ,2 ]
机构
[1] East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China
[2] Xinjiang Univ, Coll Chem Engn, Urumqi 830046, Peoples R China
关键词
SUPERCRITICAL CARBON-DIOXIDE; DIMENSIONAL STABILITY; LDPE FOAMS; FABRICATION; CRYSTALLIZATION; PERMEABILITY; FOAMABILITY; SIMULATION; EXTRUSION; SCAFFOLD;
D O I
10.1021/acs.iecr.1c00895
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A comprehensive model for shrinkage behavior of soft thermoplastic polyurethane (TPU) elastomer foams has been built, which involves in situ tensile testing of TPU under different carbon dioxide (CO2) plasticization pressures and antishrinking abilities of different cell shapes of circular, square, and hexagonal evaluated by a three-order Ogden hyperelastic equation. Combined with the nitrogen (N-2)-assisted supercritical carbon dioxide CO2 foaming and aging experimental results, it was found that the hexagonal cells can match the actual shrinkage process well, and no less than 50% N-2 content remaining in cells can effectively improve the antishrinking ability of TPU foams. According to the principle that there is no pressure difference between inside and outside foam, a feasible method of aging TPU foam under a variable ambient vacuum to reduce the shrinkage ratio was proposed, simulated, and proved.
引用
收藏
页码:7155 / 7166
页数:12
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