مهندسی شیمی ایران

مهندسی شیمی ایران

سنتز بهینه و بهبود خواص کوپلیمرهای غلظت‌دهندۀ میکروژلی پایه‌آکریلیکی به‌روش پلیمریزاسیون امولسیونی وارون

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشیار مهندسی پلیمر، دانشگاه میبد
2 استادیار مهندسی پلیمر، دانشگاه صنعتی همدان
3 دانشیار مهندسی پلیمر، پژوهشگاه پلیمر و پتروشیمی ایران
چکیده
 
در این پژوهش به سنتز بهینۀ کوپلیمرهای غلظت‌دهندۀ هیدروژلی برپایۀ سدیم آکریلات-آکریلیک اسید، به‌روش پلیمریزاسیون (بَسپارش) امولسیونی وارون پرداخته‌شد. هدف اصلی این مطالعه، افزایش بازده پلیمریزاسیون و بهبود خواص غلظت‌دهندگی و رئولوژیک (روانه‌شناختی) این مواد با شرایط سنتز بهینه، استفاده‌از شبکه‌سازهای نوین دی‌گلیسیدیل اتری، نانوذرات صفحهمانند کلوزیت اصلاح‌شده وکومونومر آکریل‌آمید است. در مقادیر برابر 3/0 گرم از دو شبکه‌ساز پلیاتیلنگلیکول دیگلیسیدیل اتر (بلندزنجیر) و دیاتیلنگلیکول دیگلیسیدیل اتر (کوتاه‌زنجیر) استفادهاز شبکه‌ساز بلندزنجیر نسبت‌به کوتاه‌زنجیر، افزایش 13~ برابری گران‌روی ظاهری (از Pa.s 1/39 به Pa.s 20/2 در سرعت برشی rpm ۱۰) را بههمراه داشت. استفاده‌از نانوذرات کلوزیت به‌عنوان تقویت‌کننده، تا مقدار بهینۀ 5% وزنی-وزنی، منجربه افزایش7~ برابری مدول ذخیره (از KPa 0/65 به KPa 5/61 در فرکانس Hz ۱۰) و افزایش چشم‌گیر غلظتدهندگی کوپلیمرها شد. افزودن مونومر آکریل‌آمید به زنجیرۀ اصلی کوپلیمر اولیه و تشکیل ترپلیمر با 40% مولیآکریل‌آمید، افزایش درصد تبدیل پلیمریزاسیون از ۶۲% به ۹۳% و افزایش 4~ برابری در گران‌روی لاتکس مستقیم را درپی‌داشت. این مطالعه، نشان‌داد که ترکیب عوامل شبکه‌ساز نوین، نانوذرات و کومونومرها می‌تواند راه‌کاری مؤثر برای تولید غلظت‌دهنده‌های پلیمری با کارایی بالا باشد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Optimized Synthesis and Enhancement of Properties of Acrylic -Based Microgel Thickener Copolymers via Inverse Emulsion Polymerization

نویسندگان English

A. R. sabzevari 1
M. B. Sobhanimatin 2
K. Kabiri 3
1 Associate Professor of Polymer Engineering, Meybod University
2 Assistant Professor of Polymer Engineering, Hamedan University of Technology
3 Associate Professor of Polymer Engineering, Iran Polymer and Petrochemical Institute
چکیده English

This study focuses on the optimized synthesis of microgel thickeners derived from sodium acrylate-acrylic acid copolymers through inverse emulsion polymerization. The primary objective was to enhance polymerization efficiency and improve the thickening and rheological properties of these materials by employing optimized synthesis conditions, novel crosslinkers (diglycidyl ether derivatives), modified Cloisite plate-like nanoparticles, and acrylamide comonomers. At equivalent concentrations (0.3 g), the use of a long-chain crosslinker (poly(ethylene glycol) diglycidyl) ether compared to a short-chain counterpart (diethylene glycol diglycidyl ether) resulted in a ~13-fold increase in apparent viscosity (from 1.39 Pa·s to 20.2 Pa·s at a shear rate of 10 rpm). Incorporation of Cloisite nanoparticles as reinforcing agents, up to an optimal concentration of 5 wt%, led to a ~7-fold rise in storage modulus (from 0.65 kPa to 5.61 kPa at 10 Hz) and a significant improvement in copolymer thickening performance. The addition of acrylamide comonomer to the primary copolymer backbone, forming a terpolymer with 40 mol% acrylamide, increased the polymerization conversion yield from 62% to 93% and produced an approximately 4-fold improvement in direct latex viscosity. This study demonstrates that the strategic combination of advanced crosslinkers, nanoparticles, and comonomers represents an effective approach for developing high-performance polymeric thickeners.

کلیدواژه‌ها English

Microgel
Polymeric Thickener
Acrylate Copolymer
Composite Hydrogel
Inverse Emulsion Polymerization
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