摘要：热熔胶粘剂因其无溶剂、粘接强度高和固化快而应用于多种行业。随着环保意识提高，可生物降解热熔胶粘剂受到关注。本文以二苯基甲烷二异氰酸酯（MDI）为反应性增容剂，制备了氯化聚碳酸丙烯酯（CPPC）/聚丁二酸丁二醇酯（PBS）/聚乳酸（PLA）共混物。热重分析（TGA）表明加入PLA提高了共混物热稳定性。流变测试表明加入PLA后共混物在170°C下的熔体弹性和黏度提高。加入32 wt% PLA时，CPPC/PBS/PLA/MDI共混物拉伸强度达到47.9 MPa。PLA含量为16 wt%时，共混物表现出高粘接强度（13.97 MPa），远高于常见商业产品。此外，酶降解测试表明共混物具有生物降解性。因此，CPPC/PBS/PLA/MDI共混物在可生物降解热熔胶粘剂方面具有应用潜力。
Abstract：Hot melt adhesives are utilized in a variety of industries because of their solvent-free, strong adhesion and rapid curing. With the increasing awareness of environmental protection, biodegradable hot melt adhesives have received attention. Herein, chlorinated poly(propylene carbonate) (CPPC)/poly(butylene succinate) (PBS)/poly(lactic acid) (PLA) blends were prepared using diphenylmethane diisocyanate (MDI) as reactive compatibilizer. Thermogravimetric analysis (TGA) demonstrated that adding PLA improved the thermal stability of the blends. From rheological tests, the melt elasticity and viscosity of the blends at 170°C were enhanced after PLA was added. The tensile strength of CPPC/PBS/PLA/MDI blends reached 47.9 MPa as 32 wt% of PLA was added. When PLA content was 16 wt%, the blends exhibited high adhesion strength (13.97 MPa), which was much higher than that of common commercial products. In addition, the enzymatic degradation tests showed that the blends had biodegradability. Therefore, CPPC/PBS/PLA/MDI blends have the potential to be used in biodegradable hot melt adhesives.