| 摘要 |
Disclosed is a reactive mixture, comprising poly(hydroxyalkanoic acid) or copolymer thereof (preferably selected from poly(glycolic acid), poly(lactic acid), polyhydroxy-butanoic acid, polyhydroxybutyrate-hydroxyvalerate copolymer, copolymer of glycolic acid and lactic acid, or combinations of two or more thereof) and a reactive composition adapted such that a relatively rubbery phase is formed once reacted, wherein the reactive composition comprises a first polymer having epoxide moieties and a second polymer having carboxylic moieties, wherein the reactive composition comprises a total of about 0.1 to 15 wt % of glycidyl functionality, and a total of about 0.1 to 15 wt % of organic carboxylic acid functionality. A method for providing a reactive mixture is also disclosed, wherein said method comprises the steps of combining poly(hydroxyalkanoic acid) or copolymer thereof, a first polymer having epoxide/glycidyl moieties and a second polymer having carboxylic moieties, wherein the reactive composition comprises a total of about 0.1 to 15 wt % of glycidyl functionality, and a total of about 0.1 to 15 wt % of organic carboxylic acid functionality. The disclosure also relates to a method for controlling the melt viscosity of a polymeric mass during melt processing.
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