摘要甲基丙烯酰氧乙基三甲基氯化铵(简称DMC)和丙烯酰胺(简称AM) 的共聚物(简称P(DMC-AM))是一种阳离子聚丙烯酰胺，近年来由于其逐渐被用于高温环境，因此对于其热稳定性能的了解十分必要。本文对同一特征黏度下，不同阳离子度的P(DMC-AM)的热稳定性进行了系统研究。首先，对样品精制提纯，并进行FTIR、1HNMR和凝胶色谱表征；其次，采用TG-DSC仪在单速率升温条件下对精制的系列化阳离子度样品进行热分解热力学研究，得到热力学参数；最后，采用TG仪在多速率升温条件下进行热分解动力学研究，用Ozawa法和Coasts法计算反应活化能Ea。结果表明对P(DMC-AM)分解温度均大于200℃，说明该聚合物热稳定性较好。P(DMC-AM)起始分解温度Ts、终止分解温度、热分解焓变△H、热分解活化能Ea均随着阳离子度的增加而增加，而热分解区间△T随着阳离子度的增加而减小。由上述结果推断P(DMC-AM)的阳离子度越高，热稳定性越好。73536

毕业论文关键词  丙烯酰胺  甲基丙烯酰氧乙基三甲基氯化铵  阳离子度  热力学  动力学  热稳定性

毕业设计说明书外文摘要

Title  Study about the Thermal Stability of P(DMC-AM)                 

Abstract The copolymer of methacrylatoethyltrimethyl ammonium chloride and acrylamide called P(DMC-AM) is an important cationic polyacrylamide ，which is increaeasingly being applied in high-temperature circumastance。 In this paper, the thermal stability of P(DMC-AM) with different cationicity and the same intrinsic viscosity was studied systematically。 Firstly, the samples were purified and characterized by FTIR，1HNMR and GPC。 Then, TG-DSC was applied to study thermal decomposition thermodynamics of the samples with series cationicity at single-heating rate。 Finally, TG was used to test Thermal decomposition kinetic parameters at multi-heating rate。 The activation energy was calculated by Ozawa and Coasts methods。 The results showed that the thermal decomposition of P(DMC-AM) could be pided into two stages, both thermal decomposition temperatures were over 200℃。 P(DMC-AM) had good thermal stability。 At the thermal decomposition progress, with the increase of the cationicities of samples, the starting temperature TS, the termination temperature Td, thermal decomposition enthalpy change △H and the activation energy ∆E increased, while the decomposition temperature range ∆T decreased。 It could be concluded that the higher the cationicities of P(DMC-AM), the better the thermal stability。

Keywords  acrylamide, methacryloyloxyethyl trimethyl ammonium chloride, cationicity， thermodynamics kinetics,  thermal stability

目   次

1 引言 1

1。1  单体及聚合物性质 1

1。2  聚合物热稳定性的研究发展 2

1。3  本课题的研究 4

2  实验原理 4

2。1  样品热稳定性测试方法 4

2。1。1  热重分析(TG) 4

2。1。2  差示扫描量热法(DSC) 5

2。2  热分解动力学研究 5

2。2。1  Ozawa-Redfern法 5

2。2。2  Coats-Redfern法 5

3  实验设计 6

3。1  方案设计 6

3。1。1  样品的制备