期刊
JOURNAL OF SUPERCRITICAL FLUIDS
卷 147, 期 -, 页码 48-58出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.supflu.2019.02.006
关键词
Thermoplastic polyether ester elastomer (TPEE); Chain topological structure; Rheology; Foamability; Supercritical carbon dioxide
资金
- National Key Research and Development Program of China [2016YFB0302200]
Thermoplastic polyether ester elastomer (TPEE) has been reacted with different multi-functional group modifiers, such as 2,2'-bis(2-oxazoline) (2,2'-BOZ) and triglycidyl isocyanurate (TGIC), to create long chain TPEE and highly branched TPEE respectively by reactive processing. Both chain extension and branching processes could improve the complex viscosity and modulus, but TPEE with a branched structure showed distinguished strain-hardening behavior. The branched structure can also accelerate crystallization processes. In the foaming process, TPEE with branched chains have a higher expansion ratio, higher cell density and wider foaming window when compared with TPEE with long chains. The branched structure can prevent cells from collapsing to obtain foamed TPEE with high expansion ratios ranging from 1.5 folds to 16 folds, cell diameters ranging from 3 mu m to 13 mu m and a cell density between 3.6 x 10(8) cells/cm(3) and 7.1 x 10(9) cells/cm(3).
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