کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1456555 989209 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of both grafting and blending modifications on the performance of lignosulphonate-modified sulphanilic acid–phenol–formaldehyde condensates
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Effect of both grafting and blending modifications on the performance of lignosulphonate-modified sulphanilic acid–phenol–formaldehyde condensates
چکیده انگلیسی

Modifying sulphanilic acid–phenol–formaldehyde condensates (SPF) with sodium lignosulphonate (LS) allows for both the grafting (GSPF) and blending (BSPF) of a series of products from SPF and LS with different LS content. The grafted macromolecule SPF-g-LS was confirmed to exist in GSPF by low-angle laser light scattering (LALLS) and Fourier-Transform infrared (FTIR) spectroscopy. GSPF formed different adsorption configurations on cement particles than BSPF, which ultimately affected their dispersive properties, because of the high charge density and large steric hindrance of the SPF-g-LS macromolecule. Both the absolute value of the ζ potential and the paste fluidity of the cement particles were greater for GSPF than BSPF at identical LS contents. GSPF and BSPF both significantly inhibited cement bleeding relative to SPF; however, this inhibition was greater for GSPF than BSPF at identical LS contents.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 42, Issue 9, September 2012, Pages 1199–1206
نویسندگان
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