Optically transparent bio-based polyamides with microcellular foaming properties derived from renewable difunctional aminoamides was written by Ranganathan, Palraj;Chen, Yu-Hao;Rwei, Syang-Peng;Lee, Yi-Huan. And the article was included in Journal of Applied Polymer Science in 2022.Application of 106-79-6 This article mentions the following:
A green approach for the synthesis of bio-based polyamides (PAs) with a new macromol. structure was developed. These bio-based PAs were synthesized by solvent and catalyst-free polycondensation combining fatty dimer acid Pripol 1009 with new difunctional aminoamides (DAAs). The later DAAs building blocks were synthesized by aminolysis of renewable di-Me sebacate (DMS) and di-Me adipate (DMA) with 3 different aliphatic diamines having diverse chain lengths, 2, 4, and 6 carbons. Bio-based PAs showed Mw up to 30,581 g/mol, initial thermal degradation over 380掳, Tm from 168.3-202.4掳C, Tg from 28.3-37.5掳C, strain from 36.4 卤4.0-313.5 卤2.0%, and tensile strength up to 27.4 卤0.1 MPa. All the PAs films had excellent optical transparency with cut-off wavelengths of 276.0-283.0 nm, transmittance from 82.7%-90.7% at 600 nm. As a proof-of-concept of their usage, 1 of the PA can form microcellular foam by the green scCO2 method. The foams possessed uniform (cell size; 40渭m, foam d.; 0.265 g/cm3, expansion rate; 7.2) and bimodal (cell size; 24/38渭m, foam d.; 0.302 g/cm3, expansion rate; 6.5) cell textures depending on their foaming temperatures This is the first report of bio-based PA foams and transparent films manufacturing without toxic solvents. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application of 106-79-6).
Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Application of 106-79-6
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics