---------------------------------------------------------------范文最新推荐------------------------------------------------------ 聚乙二醇硼酸酯的合成和摩擦化学特文化休闲
性
摘要：以硼酸和聚乙二醇为原料, 石油醚为水的共沸剂, 合成了一种聚乙二醇硼酸酯。考察了反应温度、反应时间、共沸剂、物料摩尔比等因素对合成工艺的影响, 用热重法考察了硼酸的脱水反应, 分析反应过程中可能存在的副反应, 用红外光谱对聚乙二醇硼酸酯进行结构表征。最佳反应条件为: 反应温度130℃, 反应时间70分钟，n(PEG):n(硼酸)=3:1，共沸剂V（石油醚）/V(水)=1.25，硼酸酯的酯化率可达到98.14%。利用红外光谱仪分析产物，并在环-块式摩擦磨损试验机和四球试验机上，测定了聚乙二醇硼酸酯添加到基础油后的摩擦磨损性能及聚乙二醇硼酸酯的添加量对这些性能的影响进行了考察，结果表明，含聚乙二醇硼酸酯1.5%（wt%）时，抗磨效果最佳。测定基础油、添加1.5%（wt%）聚乙二醇硼酸酯的基础油及添加T202的基础油三者的最大无卡咬负荷PB，结果表明添加T202后基础油的PB值最大。最后测定聚乙二醇硼酸
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庄尚志酯与T202复配后的摩擦化学性能以及两者的添加量对基础油的摩擦磨损性能的影响，结果表明，当添加1.5%（wt%）聚乙二醇硼酸酯时和添加1%（wt%）T202复配时，润滑油的抗磨效果最佳。11297
关键词：聚乙二醇；硼酸酯；润滑油；摩擦化学特性；T202
Abstract: With the boric acid and polyethylene glycol as raw materials, petroleum ether as water entrainer, a polyethylene glycol borate ester synthesis. The effects of reaction temperature, reaction time, azeotropic agent, molar ratio and other factors on the synthesis process, the dehydration reaction of boric acid were investigated by thermogravimetric analysis method, analysis of possible side reactions in the reaction process, the structure was characterized by infrared spectrum of polyethylene glycol borate ester. The optimum reaction conditions were: reaction temperature 130 ℃, reaction time 70 minutes, n (PEG): n (boric acid) =3:1, azeotropic agent V (petroleum ether) /V (water) =1.25, esterification of boric acid ester rate can reach 98.14%. Analysis of the products by using
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infrared spectroscopy, and in the Block-on-Ring tribometer and four ball testing machine, impact of polyethylene glycol borate is added to the ba oil and the friction and wear properties of polyethylene glycol borate ester content on the properties determined were investigated, results s
howed that, the borate ester containing polyethylene glycol 1.5% (wt%) when the wear. Determination of ba oil, adding 1.5% (wt%) maximum ba oil polyethylene glycol borate and add T202 of the ba oil of the three non-izure load PB, the results show that the addition of T202 ba oil PB maximum. Effects of adding amount of friction, the final determination of chemical properties of polyethylene glycol borate and T202 compound and their friction and wear properties of ba oil shows that, when adding 1.5% polyethylene glycol (wt%) borate and adding 1% (wt%) T202 compound, lubricating oil anti-wear effect is best.
拼音教学
2.1.1 实验试剂13
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2.1.2 实验设备13
2.2 实验仪器介绍13
小壁虎
2.2.1四球机13
2.2.2 红外光谱仪14
2.3 实验方法方框图15
学会英语
2.4 实验原理17
2.5 实验步骤17
2.5.1聚乙二醇硼酸酯的制备17
2.5.2 聚乙二醇硼酸酯的红外分析17
保持健康的英语2.5.3 聚乙二醇硼酸酯的摩擦磨损性能及与T202复配后的摩擦磨损18
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关成语3.1硼酸与PEG-200摩尔比对反应的影响19
3.2共沸剂的比率对反应的影响20
3.3温度对反应的影响21
3.4聚乙二醇硼酸酯的红外光谱分析22
4 聚乙二醇硼酸酯的摩擦磨损性能及与T202复配后的摩擦磨损性能的
政治审查情况报告
测定23
4.1 测试聚乙二醇硼酸酯与T202复配后的摩擦特性23
4.2磨斑直径与基础油中聚乙二醇硼酸酯的质量百分含量24
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