常压条件下、连续微波辐射功率90W,辐射时间8min,合成了特性粘度为0.51dL.g-1的聚乳酸-聚乙二醇共聚物(PELA)。考察了聚乙二醇(PEG)浓度、聚合时间对共聚物特性粘度和收率的影响。此外,实验研究了连续微波炉与家用微波炉中反应体系的温升曲线。结果显示,相比于家用微波炉中的间歇微波辐射,连续微波辐射下反应体系温度上升平稳无突跃。 Under normal pressure, the power of continuous microwave irradiation was 90 W and the irradiation time was 8 min. The polylactic acid-polyethylene glycol copolymer (PELA) with an intrinsic viscosity of 0.51 dL.g-1 was synthesized. The effects of polyethylene glycol (PEG) concentration and polymerization time on intrinsic viscosity and yield of copolymer were investigated. In addition, the temperature rise curve of the reaction system in continuous microwave oven and domestic microwave oven was experimentally studied. The results show that compared with the intermittent microwave radiation in a domestic microwave oven, the temperature of the reaction system rises steadily without abrupt changes under continuous microwave irradiation.