聚对苯二甲酸乙二酯共聚酯的吸附性能及采用长丝挤出增材制造进行发泡的新方法

Sorption Properties of PET Copolyesters and New Approach for Foaming with Filament Extrusion Additive Manufacturing.

作者信息

Sova Nadiya, Savchenko Bohdan, Beloshenko Victor, Slieptsov Aleksander, Vozniak Iurii

机构信息

Department of Applied Ecology, Technology of Polymers and Chemical Fibers, Kyiv National University of Technologies and Design, Nemirovicha Danchenko Street, 2, 01011 Kyiv, Ukraine.

Donetsk Institute for Physics and Engineering named after O.O. Galkin, National Academy of Sciences of Ukraine, pr. Nauki, 46, 03028 Kyiv, Ukraine.

出版信息

Polymers (Basel). 2023 Feb 24;15(5):1138. doi: 10.3390/polym15051138.

The mass transfer process of binary esters of acetic acid in polyethylene terephthalate (PET), polyethylene terephthalate with a high degree of glycol modification (PETG), and glycol-modified polycyclohexanedimethylene terephthalate (PCTG) was studied. It was found that the desorption rate of the complex ether at the equilibrium point is significantly lower than the sorption rate. The difference between these rates depends on the type of polyester and temperature and allows the accumulation of ester in the volume of the polyester. For example, the stable content of acetic ester in PETG at 20 °C is 5 wt.%. The remaining ester, which has the properties of a physical blowing agent, was used in the filament extrusion additive manufacturing (AM) process. By varying the technological parameters of the AM process, foams of PETG with densities ranging from 150 to 1000 g/cm were produced. Unlike conventional polyester foams, the resulting foams are not brittle.