کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1398089 1501375 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of feed rate of monofunctional monomers on structure of hyperbranched copolymers formed by self-condensing vinyl copolymerization in semibatch reactor
ترجمه فارسی عنوان
اثر میزان تغذیه مونومرهای تکوفانکتیک بر ساختار کوپلیمرهای پرانرژی که بوسیله کوپلیمر شدن وینیل خودکنده شده در راکتور نیمه بتنی شکل گرفته است
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی


• Hyperbranched copolymers (HBPs) prepared under semibatch process were studied.
• The molecular structure of the HBP was calculated by a generating function method.
• A higher degree of branching could be obtained at a slower feed rate of monomers.

Hyperbranched polymers (HBPs) formed by a self-condensing vinyl copolymerization, SCVCP, of monofunctional monomers M gradually fed into a reactor containing inimers AB*, which had been charged initially, were investigated using a kinetic model. Under the assumption that no cyclization occurred during polymerization, changes in the average degree of polymerization (DP), the degree-of-polymerization dispersity, the degree of branching (DB), and the number of structural units in the hyperbranched copolymers at different feed rates of monomers M were calculated by a generating function method. The distribution of the degree of polymerization could be narrowed with the addition of monomers M, and the degree-of-polymerization dispersity was increased slightly at a slower feed rate parameter of M, ϕ. A higher DB of the HBPs could be obtained at a slower feed rate and a specific stopping ratio of M, θ. For instance, a final DB of approximately 0.62 was attained at ϕ = 0.2 and θ = 1.2, which was higher than the maximum DB of 0.5 attained in a batch system with monomers M at θ = 0.6.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 60, November 2014, Pages 98–105
نویسندگان
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