摘要实验内容主要以马来酸酐(Ma)、苯乙烯(St)以及N-异丙基酰胺(NIPAAm)为单体，通过RAFT聚合反应合成了一系列具有不同嵌段比的嵌段共聚物P(St-alt-Ma)-b-PNIPAAm（PSMA-PNIPAAm）。实验中使用了热失重仪、傅里叶红外光谱仪、差示扫描仪表征了它们的结构与性能。PSMA-PNIPAAm 在DMF/水中通过自组装形成球状胶束，用纳米粒度测试仪、紫外分光光度计和透射电镜研究PSMA-PNIPAAm的胶束形貌以及自组装过程。聚合物溶液初始浓度、结构、温度、pH值对胶束的临界聚集水含量(CWC)、胶粒的形成以及粒径分布都有影响。聚合物中由于PNIPAAm嵌段比不断的增加，其临界聚集水含量由16.1%增大到18.5%，胶束粒径则由101nm增大到238nm。不过当聚合物的浓度从0.005g/mL增加到0.02g/mL时，临界聚集水含量则由28.5%降为18.5%。随着pH值由7降到2，胶束的粒径则从249nm降为58nm，而当pH=2时，聚合物胶束出现两个粒径分布范围，粒径增大至658nm，当pH>7时，胶束粒径则先增大后减小。随着温度不断升高，聚合物溶液的临界聚集水含量变小，胶束的粒径也随之减小。63845

毕业论文关键词：温敏，RAFT，临界水含量，自组装，胶束，交联

毕业设计论文外文摘要

Title     The Synthesis and Properties of the temperature-sensitive block copolymers           

Abstract Mainly with maleic anhydride experiment (Sma), styrene (St) and N-isopropyl-amide (NIPAAm) as monomers,Via RAFT polymerization synthesis of a series with different block ratio of block copolymer P (St-alt-Ma)-b-PNIPAAm (PSMA-PNIPAAm).Experiments using a thermal gravimetric analyzer, Fourier transform infrared spectroscopy, differential scanning instrument levy their structure and properties.PSMA-PNIPAAm in DMF / water formed by self-assembly of spherical micelles with nano-size tester, UV spectrophotometer and TEM study of PSMA-PNIPAAm micelles morphology and self-assembly process.The initial concentration of the polymer solution, structure, temperature, pH value of the critical micelle aggregation water content (CWC), the formation of particles and particle size distribution are affected.Since the polymer PNIPAAm block ratio continuously increases, the critical aggregation increases the water content from 16.1% to 18.5%, micellar size increases from 101nm to 238nm.However, when the polymer concentration increased from 0.005g/mL 0.02g/mL, the critical water content aggregation from 28.5% down to 18.5%.As the pH value is from 7 to 2, micelle size from 249nm down to 58nm, and when the pH = 2, the polymer micelle size distribution there are two, the particle size increases to 658nm, when the pH > 7:00, micelle diameter is first increased and then decreased.As the temperature increases, the polymer solution becomes smaller critical aggregation water content, particle size of micelles decreases.

Keywords：Temperature sensitive，RAFT,Critical water content，Self-assembly，Micelles，Crosslinked

 1 绪论1

    1.1温敏性聚合物·1       

        1.1.1 温敏性聚合物的响应机理1

        1.1.2 温敏性聚合物的表征方法2

1.1.3 温敏性聚合物的合成及改性3

1.1.4 温敏性聚合物的应用4

1.2 可逆加成-断裂链转移(RAFT)活性自由基聚合·6

1.2.1  RAFT活性自由基聚合的机理·7

1.2.2  RAFT活性自由基聚合的动力学8

1.2.3  RAFT活性自由基聚合的反应条件·8

1.2.4  RAFT活性自由基聚合的应用·9

2 温敏性聚合物P(St-alt-MA)-b-PNIPAAm的合成·11

2.1 引言·11

2.2 实验部分·11

2.2.1 实验仪器11

2.2.2 实验药品12