مطالعه اثر مونت موریلونیت بر سینتیک پلیمریزاسیون رادیکالی انتقال اتم در محیط مینی امولسیون

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه صنعتی امیرکبیر، دانشکده مهندسی شیمی

2 دانشکده مهندسی پلیمر دانشگاه صنعتی امیرکبیر

3 دانشگاه صنعتی امیرکبیر، دانشکده مهندسی پلیمر

چکیده

نانوکامپوزیت پلی (‌استایرن- بوتیل‌اکریلات)/ خاک رس با روش پلیمریزاسیون رادیکالی انتقال اتم درجا با استفاده از شروع کننده تولید‌شده از طریق انتقال الکترون (AGET ATRP) سنتز شد. ترکیب شیمیایی نمونه‌ها با روش طیف‌بینی مادون قرمز (FT-IR) شناسایی گردید. متوسط عددی و وزنی وزن مولکولی پلیمرهای حاصل و توزیع آنها با روش کروماتوگرافی ژل‌تراوایی (GPC) تعیین شد. شاخص پراکندگی پلیمرها کمتر از 2/1 بود. اثر نانولایه‌های خاک رس بر روی سینتیک پلیمریزاسیون رادیکالی انتقال اتم به کمک نمودار سینتیکی ([ln ([M0]/[M در مقابل زمان و کنترل سیستم به کمک نمودار تغییرات وزن مولکولی در مقابل تبدیل منومر بررسی شد. همه نتایج نشان‌دهنده زنده و کنترل‌شده بودن واکنش AGET ATRP در محیط مینی‌امولسیون می‌باشد. نانوذرات خاک رس باعث کاهش سرعت پلیمریزاسیون گردید که به علت اثر مانع‌شدن نانولایه‌های خاک رس در نفوذ منومرها به سمت ماکرورادیکال در حال رشد است.

کلیدواژه‌ها

عنوان مقاله [English]

A Study of Montmorillonite Effect on Atom Transfer Radical Polymerization Kinetics in a Miniemulsion Medium

نویسندگان [English]

  • Leila Hatami 1
  • Vahid Haddadi Asl 2
  • Leila Ahmadian Alam 1
  • Hossein Roghani Mamaqani 3
  • Mehdi Salami Kalajahi 3
1 Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
2 Department of Polymer Engineering and Color Technology, Amirkabir University of Technoloy
3 Department of Polymer Engineering and Color Technology, Amirkabir University of Technology
چکیده [English]

Poly (styrene-butyl acrylate)/clay nanocomposite was synthesized by activators generated by electron transfer (AGET) for atom transfer radical polymerization (ATRP). The chemical composition of the samples was studied by infra red-Furier transformation (FT-IR) spectroscopy. Number- and weight-average molecular weights of the resultant copolymer nanocomposites and their molecular weight distributions were determined by gel permeation chromatography (GPC). The polydispersity index of the nanocomposites were lower than 1.2. The effect of the nanoclay layers on the kinetics of ATRP was investigated by using a plot of ln ([M0]/[M]) versus time of the reaction and also control over the polymerization was investigated by linear relation between number-average molecular weight and monomer conversion. All of the studies confirmed the controlled/living characteristics of the AGET ATRP in the miniemulsion medium. Because of the hindrance effect of the nanoclay layers on the diffusion of the monomers toward the growing macroradicals, the rate of the polymerization decreased.

کلیدواژه‌ها [English]

  • Kinetics
  • Control
  • ATRP
  • Nanocomposite
  • Miniemulsion

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پژوهش نفت
دوره 23، شماره 74 - شماره پیاپی 74
مرداد و شهریور 1392
صفحه 20-34

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