特种聚醚封端后处理的研究  

Studis on the Blocking Treatment of Polyether

作　　者：吕效平[1] 肖人卓[1] 潘长禄[2] 

机构地区：[1]南京化工学院,210009 [2]金陵石化公司塑料厂

出　　处：《塑料工业》1993年第2期32-32,56,共2页China Plastics Industry

摘　　要：聚醚封端后生成的醋酸必须脱除以保证聚醚质量。本文在1L及12L釜内考察了工艺条件(真空度、通气量、搅拌速度)和不同解吸气体对脱酸的影响。实验证明,提高真空度和搅拌速度,增加通气量均可提高脱酸率。在130℃时保持真空度533×10~2Pa,搅拌速度400r/min和空气流量8.9m^3/m^3·min。经2小时处理后聚醚酸值可降至0.3mg KOH/g以下。使用氮气脱酸的效果优于空气。The acetic acid formed by blockin8 of polyether must be removed in order to guarantee polyether's quality. The influence of technological conditions (vacuum, gas flowerate, agitation speed)and difference of stripping gases on deacidification were examined in 1L and 12L kettles. The result showed high vacuum and gas flowrate,intensive agitation were favorable to acid removal. At 130℃ keepping vacuum 532×10~2Pa, agitation speed 400 rpm and air flowerate 8.9m^3/m^3. min,for 2 hours of treatment,the acid value of polyether was lowered below 0.3mgKOH/g. The use of nitrogen as stripping gas was better than that of air.

关 键 词：聚醚 封端后处理 脱酸 

分 类 号：O632.32[理学—高分子化学]