پیش‌بینی مدول یانگ پلی‌یورتان تقویت شده به کمک آکریلونیتریل بوتادین استایرن بر مبنای مورفولوژی فاز

نوع مقاله: پژوهشی

نویسندگان

1 دانشگاه سمنان

2 دانشگاه مازندران

چکیده

مدول یانگ ترکیب پلی­یورتان ترموپلاستیک و آکریلونیتریل بوتادین استایرن با درصد وزنی­های مختلف محاسبه شد. مقایسه و ارزیابی بین نتایج تجربی و پیش بینی های تئوری بر اساس مدل های مختلف میکرومکانیک برای مدول یانگ بر اساس هر دو مورفولوژی قطره / ماتریس و هردوفاز پیوسته ارائه شده است. هر دومدل دوبعدی (موازی، سری، ماکسول، هالپین تسای،  تاکایاناگی ، دیویس و کران-پاتل ) و سه بعدی (کلاریک، برنتسن  و نیجهوف ) برای پیش بینی مدول یانگ ترکیب پلیمری انتخاب شدند. در این کار بر اثر درصد وزنی ترکیب بر مورفولوژی و خواص مکانیکی تاکید شده است. تصاویر میکروسکوپ الکترونی نشان داد که با حضور کمتر از 20 درصد وزنی آکریلونیتریل بوتادین استایرن در ماتریس پلی یورتان مورفولوژی قطره ماتریس به وجود می­آید ولی در درصد وزنی 30 درصد ذرات آکریلونیتریل بوتادین استایرن به صورت بیضوی کشیده شده در ماتریس پخش شدند و وارونگی فاز اتفاق افتاد. در ترکیبات 5، 10 و 20 درصد وزنی آکریلونیتریل بوتادین استایرن، که ذرات فاز پراکنده به صورت قطرات کاملا یکنواخت در ماتریس پلی یورتان پخش شدند، مدل تاکایاناگی موازی و مدل سری اجزا موازی برنتسن با دقت خوبی توانستند مدول را پیش بینی کنند. درصد وزنی 30 درصد که پدیده وارونگی فاز مشاهده شد و ترکیب تقریبا به صورت هر دو فاز پیوسته بود، مدل های کران و پاتل، سری نیجهف و کلاریک که بر پایه مورفولوژی هر دو فاز پیوسته اند، از دقت بالایی برخوردار بودند.

کلیدواژه‌ها


عنوان مقاله [English]

Young's Modulus prediction of polyurethane and acrylonitrile butadiene styrene polymer blend based on phase morphology

نویسندگان [English]

  • Farzaneh Memarian 1
  • Abdolhossein Fereidoon 1
  • Morteza Ghorbanzadeh Ahangari 2
چکیده [English]

Young's modulus of blends of thermoplastic polyurethane (TPU) and acrylonitrile butadiene styrene (ABS) are measured with different weight percentage (blend ratio). The results of the different micromechanical models prediction of Young's modulus, based on both droplet matrix and co-continuous morphology, are compared with experimental results. Both two-dimentisional models like series, parallel, Maxwell, Halpin-Tsai, Takayanagi, Davis, Coran and Patel, and three-dimensional models like Kolarik, Barentson and Nijhof are used for Young's modulus prediction of polymer blends. In this work, an emphasis was given to the effect of weight percentage on morphology and mechanical properties of the blend. Scanning electronic microscopy shows droplet matrix morphology in the presence of less than 20 wg% ABS in TPU matrix but in 70/30 TPU/ABS blend ratio, ABS phase dispersed like elongated elliptical and phase inversion happened. In the 95/5, 90/10 and 80/20 blend ratio  which ABS droplets dispersed uniformly throughout the TPU matrix, Parallel Takayanagi and Barentson series model of parallel parts, could predict Young's modulus with good accuracy. In the 70/30 blend ratio which phase inversion was observed and both phases are somehow continuous, Coran-Patel, series Nijhof and Kolarik models were accurate.

کلیدواژه‌ها [English]

  • Polyurethane
  • Acrylonitrile Butadiene Styrene
  • Micromechanical models
  • Young's Modulus
  • Polymer Blend
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