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Amphiphilic hydroxyl functioned polyester(HFP) can be used as compatibilizers for blends of starch and resins.We developed a synthetic method for effective preparation of HFPs.Water was removed by high flow rate N_2 rather than high vacuum during polycondensation of sebacic acid with xylitol,sorbitol,or mannitol in the presence of dehydrative condensation catalyst and the product is with[η]of 27.2 mL/g,M_n of 1903,M_w of 167,693,T_g of -30.5℃,T_m of 44.0℃.Weight loss is 1.73%under 200℃. The integral distributions of molecular weight are 43.6 wt%and 63.8 wt%over 10,000 and 3000,respectively.The results indicated that higher molecular weight HFP was economically synthesized.
We developed a synthetic method for effective preparation of HFPs. Water was removed by high flow rate N_2 rather than high vacuum during polycondensation of sebacic acid with xylitol, sorbitol, or mannitol in the presence of dehydrative condensation catalyst and the product is [η] of 27.2 mL / g, M_n of 1903, M_w of 167, 693, T_g of -30.5 ° C, T_m of 44.0 ° C.Weight loss is 1.73% under 200 ° C. The integral distributions of molecular weight are 43.6 wt% and 63.8 wt% over 10,000 and 3000, respectively. These results indicated that higher molecular weight HFP was economically synthesized.