Chen, Yu-Hao published the artcileSynthesis and characterization of low-temperature polyamide 6 (PA6) copolyamides used as hot melt adhesives and derived from the comonomer of novel aliphatic diamine bis(2-aminoethyl) adipamide and adipic acid, Synthetic Route of 627-93-0, the publication is International Journal of Adhesion and Adhesives (2020), 102619, database is CAplus.
A novel aliphatic PA6 copolyamide (PA6(BAEA/AA))-based hot melt adhesive was synthesized from ε-caprolactam with the organic salt of bis(2-aminoethyl) adipamide (BAEA) and adipic acid (AA), with BAEA/AA content ranges from 5 to 15 mol%. The chem. structures of BAEA diamine, BAEA/AA organic salt, PA6(BAEA/AA) copolyamides, and neat PA6 were obtained using FT-IR and 1H NMR. Determined by the comonomer compositions, the relative viscosity and mol. weight (Mw) of the PA6(BAEA/AA) were from 2.29 to 2.74 and from 14,530 to 19,500 g mol-1, resp. Adding the BAEA/AA structure strongly affected the crystallization behavior and thermal properties of the copolyamides. DSC results revealed that the melting temperature (Tm) of the copolyamides declined as the mole% of BAEA/AA increased in the range 5-15 mol%, and a TGA test revealed that the thermal decomposition of the copolyamides was similar to that of neat PA6. The Tm, glass transition temperature (Tg), and thermal stability (Td5%) with a BAEA/AA salt content of 10 mol% had the lowest values of 162.2, 40.3, 354.6°C, resp., while the fusion enthalpy (ΔHm) was lowest at 15 mol% (21.2 J g-1). Most remarkably, PA6(BAEA/AA) exhibits much better mech. properties such as tensile strength (33.6-52.6 MPa) and elongation at breakage (114.7-584.5%), than the PA6 homopolymer. The peel strength of PA6 reached a maximum value of 53.4 N cm-1 at 10 mol% of BAEA/AA salt, and this value is better than those of com. hot melt adhesives.
International Journal of Adhesion and Adhesives published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Synthetic Route of 627-93-0.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics