系统研究了顺丁烯二酸和乙酸乙烯酯合成低分子量(Mn为1000～2000)共聚物(MV)的反应条件,找出适合工业生产的较佳工艺。(MV)在常压静态空气中200℃时仅微弱分解,250℃时失重才5.76％,热稳定性良好。它的7.5％淡水或人工海水溶液经140℃及200℃处理后,其粘度保留值在71％以上;在淡水和饱和盐水泥浆中(常温及高温下)分散效果显著。 The reaction conditions of synthesizing maleic anhydride and vinyl acetate with low molecular weight (Mn of 1000 ~ 2000) were systematically studied, and a better process suitable for industrial production was found out. (MV) only slightly decomposed at 200 ℃ in static air at atmospheric pressure. The weight loss was only 5.76% at 250 ℃ and the thermal stability was good. Its 7.5% fresh or artificial seawater solution after 140 ℃ and 200 ℃ treatment, the viscosity retention of 71% or more; in freshwater and saturated brine slurry (at room temperature and high temperature) dispersion effect is significant.