Chen, Yanru published the artcilePoly(1,5-pentylene-co-2,2,4,4-tetramethyl cyclobutylene terephthalate) copolyesters with high Tg and improved ductility and thermal stability, Related Products of alcohols-buliding-blocks, the publication is Polymer (2021), 124152, database is CAplus.
Poly(1,5-pentylene-co-2,2,4,4-tetramethyl cyclobutylene terephthalate) (PPecBT) random copolyesters glass transition temperature up to 136°C were synthesized through two-step melting polycondensation of di-Me terephthalate (DMT) or terephthalic acid (TPA), 2,2,4,4-tetramethyl-1,3-cyclobutanediol (CBDO) and 1,5-pentanediol (PeDO). They were characterized and assessed with intrinsic viscosity, 1H NMR, DSC, TGA, tensile and impact testing as well as melt foaming observation. Using PeDO as a diol comonomer was helpful to depress CBDO sublimation and pipeline blocking, and to reduce the composition and cis-trans ratio deviations between monomer and copolymer. The presence of PeT repeat unit in PPecBT was beneficial to improve the thermal stability of PPecBT and to reduce undesired melt foaming and volume expansion during melt processing. The Tg of these amorphous copolymers is determined by intrinsic viscosity, copolymer composition and cis-cB unit fraction, and a quant. relationship among them is established. Futhermore, these PPecBTs showed superior tensile ductility as well as strength and modulus.
Polymer published new progress about 111-29-5. 111-29-5 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ploymers, name is Pentane-1,5-diol, and the molecular formula is C5H12O2, Related Products of alcohols-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts