摘要：偶氮苯聚合物由于良好的熱力學性能，光致異構化活性，所以成為最受歡迎的高分子材料之一，受到越來越多的關注。PNIPAM是近年來發(fā)展起來的一種新型智能材料，其潛在的應用價值已吸引了眾多的研究者。PNIPAM可以與生物大分子進行偶合反應，傳遞溫敏性，制成生物功能性材料。隨著研究和開發(fā)工作的進一步深入，在不久的將來，熱敏性PNIPAM將在化工、醫(yī)學、生物、材料領域中起著不可替代的作用。本課題首先合成偶氮苯引發(fā)劑，再通過原子轉移自由基聚合(ATRP)以CuCl/Me6TREN為催化體系，異丙基丙烯酰胺為單體，異丙醇/水為溶劑，和雙烯單體制備支化PNIPAM，利用核磁共振氫譜(1H-NMR)、檢測凝膠滲透色譜(TD-GPC)等測試方法對聚合物進行了結構表征,證明了所制的聚合物是支化的。通過紫外可見分光光度計研究了偶氮苯聚合物的光致順反異構化行為，最后研究了紫外光輻照對聚合物最低臨界溶解溫度（LCST）的影響。

關鍵詞：PNIPAM；原子轉移自由基聚合；偶氮苯

  

Preparing For Branched Poly (propylene acryl amide) Using Azobenzene Initiator

Abstract：Due to good thermodynamic performance, light isomerization activity, azobenzene polymers become the most popular one of polymer materials, and it gets more and more attention. PNIPAM is developed a kind of new smart material in recent years, its potential application value has attracted numerous researchers. PNIPAM can coupling reaction with biological macromolecules, win min sex, and it can be made in biological functional materials. Along with the further research and development work, in the near future, heat-sensitive PNIPAM will be in the field of chemical industry, medicine, biology, materials play an irreplaceable role. This topic first prepare azobenzene initiator, then we used CuCl/Me6TREN as catalytic system, isopropyl acrylamide as monomer, isopropyl alcohol/water as solvent, and a percentage of the double olefinic monomerh has been used. We prepare the polymer by atom transfer radical polymerization (ATRP). The structure of the polymer was characterized by 1H-NMR, TD-GPC and other means of access for the study of their function changes according to the structure of the branched PNIPAM. The changes in structure and performance was studied by changing the ambient temperature and light stimulus, revealing the azobenzene cis-trans isomerization lead to spatial changes in size of the impact of the phase transition properties of polymer materials. Then we researched the impact of low critical solution temperature (LCST) of the polymer under the irradiation of UV.

Key words：PNIPAM; ATRP; Azobenzene

目  錄

1 前言 1

1.1 課題研究的意義 1

1.2課題研究現狀和發(fā)展趨勢 1

1.2.1 支化聚合物的研究現狀 2

1.2.2 偶氮苯聚合物的研究進展 2

1.2.3 偶氮苯化學性質的影響 2

1.2.4 ATRP反應原理 2

1.2.5 PNIPAM的合成 3

1.2.6 PNIPAM的應用 3

1.3 課題的研究目標、內容及合成方法 4

1.3.1研究目標 4

1.3.2研究內容 4

1.3.3研究方案 4

1.3.4支化聚異丙基丙烯酰胺(PNIPAM)的合成 4

2實驗部分 4

2.1 原料及試劑及實驗儀器 4

2.2原料的合成和預處理 5

2.2.1 NIPAM的提純 6

2.2.2 催化劑氯化亞銅的提純 6

2.2.3 配體三-（N, N-二甲基氨基乙基）胺(Me6TREN)的合成 6

2.2.4偶氮苯引發(fā)劑的合成 7

2.3 支化PNIPAM的制備 8

2.4聚合過程及后處理 8

2.4.1聚合反應過程 8

2.4.2聚合物的后處理 9

2.5測試方法和表征 9

3 結果與討論 11

3.1核磁共振氫譜(1H-NMR)分析 11

3.1.1 引發(fā)劑的核磁圖 11

3.1.2 支化聚異丙基丙烯酰胺核磁圖 11

3.2 支化聚異丙基丙烯酰胺的表征 12

3.2.1支化聚異丙基丙烯酰胺的分子量分布 12

3.2.2支化聚異丙基丙烯酰胺支化MARK曲線圖 12

3.2.3支化因子與分子量的關系圖 13

3.3紫外光譜分析 14

3.3.1端基含偶氮苯支化PNIPAM光致異構化行為的紫外光譜分析 14

3.4端基含偶氮苯結構支化PNIPAM的LCST的分析 16

4 結論 17

參考文獻 20