Synthesis of poly(vinyl alcohol‐graft‐hyperbranched glycerol)

Abstract

We report the first example of grafting hyperbranched polyglycerol onto poly(vinyl alcohol) via ring-opening polymerisation of glycidol to prepare poly(vinyl alcohol-graft-hyperbranched glycerol) (P[(VA)-g-(hPG)]). The effects of catalyst, molecular weight of PVA, reaction temperature, water content, moles of reagent, and addition time of reagent were also investigated. P[(VA)-g-(hPG)] with various mole fractions of hPG were prepared and the degrees of substitution and branching were determined. P[(VA)-g-(hPG)] displayed decreased degree of crystallinity and also increased solubility in water, compared to PVA. P[(VA)-g-(hPG)] is shown to be a superior hair styling polymer with a curl retention value of 85% after 4 h.

Solvothermal Carbonization of Wood Chips via the Dechlorination of PVC in Glycerol

“…According to the results that have been obtained so far, a biochar that cannot be distinguished from PVC and WCs was obtained due to the progress of resini cation, which was accompanied by dechlorination, in the temperature range of 220-240°C. is is due to the ring-opening polymerization reaction of glycidol and epichlorohydrin and the epoxy reaction with the hydroxyl group in the polyvinyl alcohol structure in PVC or the cellulose of WCs (Chang et al, 2013;King et al, 2017). us, cross-linked networks are formed between PVC and WCs with an epoxy group and carbonized.…”