Journal
POLYMER
Volume 165, Issue -, Pages 124-132Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2019.01.039
Keywords
Long-chain branched; High-expanded foam; poly(aryl ether ketone); Supercritical carbon dioxide
Categories
Funding
- National Nature Science Foundation of China [51503197]
- Jilin Province Talent Project [20170519005JH]
- Jilin Province Science and Technology Development Plan [20180201094GX, 20160520119JH]
Ask authors/readers for more resources
In this work, a new strategy was proposed to improve the foamability of poly(aryl ether ketone) (PAEK) based on novel long-chain branched PAEK (LCB-PAEK). To improve the resin melt strength, the amorphous LCB-PAEK was fabricated via a simple ternary copolymerization of phenolphthalein, 4,4'-difluorobenzophenone, and 1,1,1-tris (4-hydroxyphenyl)ethane. To regulate the extent of reaction and avoid crosslinking, 4-fluorobenzophenone was introduced as the end-capping reagent. The presence of long-chain branches were proved by gel permeation chromatography and rheological characteristics, including storage modulus and tensile viscosity. Afterwards, the prepared LCB-PAEK samples were foamed using supercritical carbon dioxide (ScCO2) as the blowing agent. The influence of branching content on foaming results was investigated in detail, and significant improvement in foamability was observed. By regulating the foaming parameters, the highest expansion ratio of 27.5 was achieved, which was almost ninefold higher than that of linear PAEK. In addition, the good mechanical properties indicated the promising applications of LCB-PAEK foams as high-performance structural foam.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available