Sova Nadiya, Savchenko Bohdan, Beloshenko Victor, Slieptsov Aleksander, Vozniak Iurii
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.
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.
研究了乙酸二元酯在聚对苯二甲酸乙二酯（PET）、高乙二醇改性聚对苯二甲酸乙二酯（PETG）和乙二醇改性聚环己烷二甲醇对苯二甲酸酯（PCTG）中的传质过程。发现络合醚在平衡点的解吸速率明显低于吸附速率。这些速率之间的差异取决于聚酯的类型和温度，并使得酯能够在聚酯体积中积累。例如，PETG在20℃时乙酸酯的稳定含量为5 wt.%。其余具有物理发泡剂性质的酯被用于长丝挤出增材制造（AM）工艺。通过改变AM工艺的技术参数，制备出了密度范围为150至1000 g/cm的PETG泡沫。与传统聚酯泡沫不同，所得泡沫不脆。
