PP-g-MAH接枝共聚物的制備及結晶動力學的研究

材料科學論文編號:CL087  論文字數:9048,頁數:30

目  錄
中文摘要 I
英文摘要 II
目錄 III
1. 緒論 1
 1.1  引言 1
 1.2 MAH接枝PP的早期研究 1
 1.3 溶液接枝 1
 1.4 接枝反應原理 2
 1.5結晶動力學 3
 1.5.1 結晶速度的測定方法 3
 1.5.2 Avrami方程 3
 1.6論文的研究意義 4
2. 實驗部分 6
 2.1 原料和設備 6
 2.1.1 原料和試劑 6
 2.1.2 實驗儀器和設備 6
 2.2 實驗方法 6
     2.2.1 接枝物的制備 6
     2.2.2 接枝率的測定 6
     2.2.3 紅外光譜分析 6
     2.2.4 球晶的培養與觀察 7
     2.2.5 DSC測定 7
3. 結果與討論 7
 3.1 紅外光譜分析 7
 3.2 偏光顯微鏡觀察形態 8
 3.3 結晶動力學 10
 3.3.1非等溫結晶數據處理 10
 3.3.2 等溫結晶數據處理 17
4．總結與展望 23
致謝 24
參考文獻 25

摘 要：本論文用自由基聚合方法，以過氧化苯甲酰（BPO）為引發劑，馬來酸酐（MAH）為接枝單體來接枝聚丙烯。紅外光譜分析結果表明，接枝產物比PP多出一個羰基的吸收峰。用偏光顯微鏡對PP和PP-g-MAH的形貌、結構、粒徑等進行了表征，實驗表明PP和PP-g-MAH的晶粒都是典型的球形結構，接枝后晶粒尺寸減小。采用差示掃描量熱儀( DSC ) 對PP和PP-g-MA的等溫結晶動力學和非等溫結晶動力進行研究。非等溫過程，研究了降溫速率分別在5、10、20、40℃/min下的結晶行為；等溫結晶過程分別研究了結晶溫度在128、130、132、134、136℃下的結晶行為；并對實驗數據采用Avrami方程和ozawa方程進行分析，求出結晶動力學指數、 結晶速率常數等數據。
 

關鍵詞：聚丙烯；馬來酸酐；接枝共聚物；結晶動力學

Abstract: In this paper, the graft copolymer PP-g-MAH was prepared by polypropylene and maleic anhydride (MAH) by free radical polymerization with the initiator benzoyl peroxide (BPO).The copolymer was characterized by IR,it is showed that copolymer posses more a Carbonyl group of peaks compared with PP. The crystallization morphology was in investigation by polarizing microscope,and the size of crystal was measured.The isothermal and non-isothermal kinetics of copolymer was researched by differential scanning calorimetry (DSC).In the non-isothermal process, the crystallization kinetics was investigated with different cooling rate such as 5, 10, 20, 40℃/min. respectively.In the isothermal process, the crystallization kinetics was investigated with different annealing temperature such as 128, 130,132,134 and 136℃.The DSC dates was discussed by Avrami and Ozawa equation,and the index of crystallization kinetics and crystallization rate constant was obtained .

Keywords: Polypropylene(PP); Maleic anhydride (MAH); Graft copolymer; Crystallization kinetics