MAA和MMA梯度共聚物性能研究

化工論文編號:HG159  論文字數:7308,頁數:22

目  錄
中文摘要 I
英文摘要 II
目  錄 III
1 緒論 1
2 實驗部分 8
 2.1 實驗原料 8
 2.2 梯度共聚物水溶液的制備 9
 2.3 梯度共聚物膜的制備 9
 2.3 表征方法 10
3 結果與討論 11
 3.1 梯度共聚物水溶液的性能 11
 3.2 梯度共聚物熱性能 14
 3.3 梯度共聚物膜的表面形貌 16
4 結論 17
致  謝 18
參考文獻 19

摘要：梯度共聚物是一類新型的聚合物材料，其沿鏈長方向組成呈梯度漸變，組成分布介于無規共聚物和嵌段共聚物之間。隨著活性自由基聚合技術的發展，梯度共聚物才逐漸被關注。梯度共聚物被認為是一類潛在的功能性材料，可以用作阻尼材料、相容劑、表面活性劑等。理論和實驗都證明組成梯度是一個可以調控聚合物納微米形貌的鏈結構參數，因此它對實現聚合物材料的高性能十分重要。本文以甲基丙烯酸(MAA)/甲基丙烯酸甲酯(MMA)梯度共聚物(Poly(MAA-grad-MMA))為模型聚合物，采用組成為無規分布的共聚物(Poly(MAA-uni-MMA))、組成梯度為線性的共聚物(Poly(MAA-li-MMA))、中間段為線性梯度的三嵌段共聚物(Poly(MAA-tri-MMA))以及二嵌段共聚物(Poly(MAA-di-MMA))四種梯度共聚物，系統地研究了組成分布對Poly(MAA-grad-MMA)水溶液的性能、Poly(MAA-grad-MMA)的熱性能以及Poly(MAA-grad-MMA)膜的表面形貌。

關鍵詞：MAA/MMA梯度共聚物；組成分布；溶液性能；熱性能；表面形貌
英文摘要

Abstract: Gradient copolymers, of which the chemical compositions change along chain backbones, can be synthesized only via living polymerization processes. As a novel type of copolymers, synthesis of gradient copolymers and eva luation of their materials properties have received increasing interest recently. Gradient copolymers are potential to be used as damping materials, compatibilizer, etc. Both theoretical and experimental investigations suggested that the composition profiles along chains be an important microstructural parameter for fine-tuning nano-morphologies, and thus physical and functional properties of polymer materials. We used four kinds of methacrylic acid(MAA)/methyl methacrylate(MMA) gradient copolymers, involving uniform MAA/MMA copolymer(Poly(MAA-uni-MMA)), linear MAA/MMA copolymer(Poly(MAA-li-MMA)), triblock MAA/MMA copolymer with a linear gradient mid-block(Poly(MAA-tri-MMA)) and diblock MAA/MMA copolymer (Poly(MAA-di-MMA)), to systematically investigate the influence of composition profiles on their chemical and physical properties in solution, in bulk and in form of film. 

Keywords: MAA/MMA gradient copolymer; Composition profiles;Solution property; Thermal property; Film property