Ai-jun CUI, Wei-liang LU, Ze-yun WANG, Jun-kai TIAN, Qun CHEN, Ming-yang HE. Research on the Synthesis and Property of Poly(glycolic) Acid via Melt/Solid Polycondensation[J]. Polymer Bulletin, 2013,26(2):73-78.
Ai-jun CUI, Wei-liang LU, Ze-yun WANG, Jun-kai TIAN, Qun CHEN, Ming-yang HE. Research on the Synthesis and Property of Poly(glycolic) Acid via Melt/Solid Polycondensation[J]. Polymer Bulletin, 2013,26(2):73-78.DOI:
was synthesized via melt/solid polycondensation with glycolic as starting material. A general procedure for preparation was as follows: At first
oligomer was prepared by melt-polycondensation of glycolic acid (GA) at 190℃
and then it was subjected to solid-state polycondensation at the same temperature to increase the molecular weight. PGA product was characterized by IR
DSC and X-ray diffractometry. By examining the effect of different catalysts
catalyst amount
melting or not
reaction temperature and time on the polymerization
optimum conditions of the PGA synthesis was obtained as follows:reaction temperature 190℃
0.4% zinc acetate dihydrate and p-toluene sulfonic acid of same Molar as catalyst
melting one time after 40 hours solid polycondensation
then continuous 60 hours solid polycondensation after being crashed into pieces.