Diphenolic acid

In this study, two benzoxazine monomers, m-alkylphenyl-3,4-dihydro-2Hbenzoxazine (CA-Bz) and 4,4 Ꞌ -Bis-[6-(3-phenyl-3,4-dihydro-2H-1, 3-benzoxazine)] pentanoic acid (DPA-Bz) were successfully synthesized from fully bio-based phenols (cardanol and diphenolic acid). Their structures were confirmed by FTIR and NMR spectroscopy. CABz/DPA-Bz blend was prepared at weight ratio of 3:1. Polymerization behavior of the blend was investigated by DSC.

10p nguyenminhlong19 22-04-2020 22 0   Download

This work investigated the betalains profile and associated molecular changes during Rivina humilis L. berry development and 1 month after inducing stress through elicitors such as salicylic acid (SA, 0.05–0.5 mM) and chitosan (CH, 0.1%–1.0%). The results showed that, during berry development, diphenol oxidase activity of tyrosinase increased, which was reflected in an exponential increase in betalains accumulation.

9p vikimsa 22-02-2019 24 1   Download

The aim of this study was to examine the use of renewable diphenolic acid (DPA) as starting materials together with benzylamine and paraformaldehyde for the synthesis of novel polybenzoxazine resin with low curing temperature. The monomer structure was confirmed by 1 H and 13C nuclear magnetic resonance (NMR) spectroscopy, and Fourier transform infrared (FTIR) spectroscopy.

7p cumeo3000 01-08-2018 36 0   Download