Preparation,Characterization,and Properties of Poly(trimethylene carbonate)/Poly(lactic acid)/Hydroxyapatite Composite Microspheres
In view of the problems of high brittleness,poor toughness,high acidity of degradation products and poor mechanical properties of polytrimethylene carbonate(PTMC),a PTMC/PLA composite material was developed with PTMC and PLA with a mass ratio of 1∶1 as the base material,using blending modification method and hydroxyapatite(HA)as the modifier,and further using spray drying method to prepare PTMC/PLA/HA composite microspheres.The structural characterization results indicate that PTMC/PLA/HA composite microspheres have been successfully prepared;The performance test results indicate that,the PTMC/PLA/HA composite microspheres have uniform particles and good dispersibility,with an average particle size of 5.2～7.7 μm.They have high thermal stability,and the thermal stability performance first increases and then gradually decreases with the increase of HA content.
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