极性烯烃类单体聚合包覆硝酸铵工艺初探
关键词 硝酸铵 聚合物 沉淀聚合 原位聚合 包覆 吸湿率 改性
毕业论文设计说明书外文摘要
Title Studies on process of Coating AN with Precipitation and in Situ Polymerization was carried out in this paper
Abstract
Studies on process of coating AN with precipitation and in situ polymerization was carried out in this paper. Using ratio of coating layer and hydroscopicity declining rate as indexes, the effect of dosage of initiator, kinds of monomer, monomer ratio was index above. The result showed: When the monomer of MMA and BA mol ratio is 2:1, the copolymer film is the best one comparing with other copolymer mol ratios such as 3:2, 1:1, 1:2, 4:1 and 1:4. When the react condition was 4.2 ml of methyl methacrylate, 2.9 ml of butyl acrylate amount , 30 ml of the solvent of chloroform, 0.7% of initiator dosage,8h the reaction time , 60℃ the reaction temperature, the hydroscopicity declining rate could reach 30.44% in relative humidity of 68% (35℃ SrCl2 saturated solution) in 24h, and meanwhile, the cladding layer of mass fraction was about 0.25%. Therefore the result above showed that not only the hydroscopicity declining rate could reach 30.44% but also the cladding layer of mass fraction was about 0.25%. This was better than results reported in literature until now.
Keywords ammonium nitrate polymer precipitation polymerization situ polymerization coated hydroscopicity modified
目 次
1 引言 1
1.1 硝酸铵 1
1.2 硝酸铵防吸湿改性包覆方法 1
1.3 存在问题及解决思路 3
1.4 本文研究内容及意义 3
2 实验原理 5
2.1 原位聚合原理 5
2.2 吸湿率测定原理 5
2.3 自由基聚合原理 5
3 方案设计 7
3.1 实验方案设计 7
3.2 结果评价和指标 8
4 实验部分 10
4.1 实验仪器及药品 10
4.2 实验步骤 10
5 实验结果与分析 13
5.1 单体MMA空白聚合 13
5.2 单体BA空白聚合 14
5.3 单体MMA包覆AN 14
5.4 单体MMA、BA空白共聚 15
5.5 引发剂用量初探 16
5.6 单体MMA、BA共聚包覆AN 16
5.7 表征 17
6 问题讨论 23
结 论 24
展 望 25