聚己内酯丙交酯共聚物的制备及表征

Preparation and characterization of poly(ε-caprolactone-co-D,L-lactide)

以己内酯和D,L-丙交酯为原料,辛酸亚锡为催化剂,在减压条件下开环聚合己内酯丙交酯无规共聚物。分别利用红外光谱、核磁共振技术对产物进行结构分析,利用差示扫描量热仪及热重分析仪对产物进行热性能分析。结果表明:成功合成了目标产物,投料比接近共聚物组成比例,共聚物的热降解分2步进行。

Poly （ε-caprolactone-co-D ,L-lactide） is synthesized by ring open polymerization with stannous octanoate as catalyst. The polymerization process is carried out under reduced pressure using ε-caprolactone and D,L-lactide as raw materials. The chemical structure of the product is characterized using nuclear magnetic resonance （NMR） and infrared spectrometer （ FTIR ）. Thermal properties are studied using differential scanning calorimetry （ DSC ） and thermo- gravimetric analyzer （TGA）. The results show that, the target product is synthesized successfully. The resulting copolymer composition exhibits good relation with the molar ratio feed of ε-caprolactone to D, L-lactide. TGA results show that the copolymer pyrolysis undergo two steps.