کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6590999 456868 2014 59 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular weight/branching distribution modeling of low-density-polyethylene accounting for topological scission and combination termination in continuous stirred tank reactor
ترجمه فارسی عنوان
مدل سازی توزیع وزن مولکولی / شاخه ای از حسابداری با ضخامت کم پلی اتیلن برای تجزیه توپولوژیک و ختم ترکیب در مخزن پیوسته راکتور
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
We present a comprehensive model to predict the molecular weight distribution (MWD),1 and branching distribution of low-density polyethylene (ldPE),2 for free radical polymerization system in a continuous stirred tank reactor (CSTR).3 The model accounts for branching, by branching moment or pseudo-distributions. The common free radical polymerization reactions including chain scission have been considered in the model. Non-linear or the so-called topological scission has been modeled using approximate fragment length distributions derived from scission, applied to branching topologies. To model the distributions, the Galerkin-FEM method based on the same principles as PREDICI® has been applied and implemented in MATLAB©. The fundamental numerical problem arising from topological scission has been solved. Thus, the model provides more accurate results, allowing a precise comparison to earlier results and to Monte Carlo simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 116, 6 September 2014, Pages 144-160
نویسندگان
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