کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1403966 984857 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of initial monomer concentration on the equilibrium swelling and elasticity of hydrogels
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Effect of initial monomer concentration on the equilibrium swelling and elasticity of hydrogels
چکیده انگلیسی

The linear swelling ratio α and the effective network chain length N of a series of poly(N,N  -dimethylacrylamide) (PDMAAm) hydrogels were investigated as a function of the gel preparation concentration ν20. PDMAAm hydrogels were prepared at a fixed cross-linker ratio but at various initial monomer concentrations. It was found that α   is not a monotonic function of ν20. As ν20 is increased, α   first decreases up to about ν20=0.10 and remains constant in a narrow range of ν20, but then it increases continuously. The ν20-dependence of α is due to the variation of the network chain length N   depending on the gel preparation concentration. In the range of ν20 below 0.1, N   follows the scaling relationship N≈ν20-2, while at higher concentrations, N   varies only slightly with ν20. The increase of α with N   obeys the relation α≈ν20N1/5, as predicted by the Flory–Rehner theory.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 42, Issue 4, April 2006, Pages 955–960
نویسندگان
, ,