کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1456805 | 989224 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Study on the foaming behaviour of allyl ether-based polycarboxylate superplasticizers Study on the foaming behaviour of allyl ether-based polycarboxylate superplasticizers](/preview/png/1456805.png)
In this study, the foaming behaviour of allyl ether-based polycarboxylate (PCE) superplasticizers and the mechanism underlying this effect is presented. It was found that both purified allyl ether-co-maleic acid PCE and individual allyl ether macromonomer possess moderate surfactant properties but do not cause the excessive foaming known from industrially manufactured PCEs. Whereas, a mixture of purified PCE polymer and only small amounts (≥ 10%) of allyl ether macromonomer shows very strong foaming. This combination exhibits similar foaming action like industrially manufactured PCE superplasticizers. Apparently, the allyl ether macromonomer acts as a co-surfactant (foam stabilizer) to PCE which already presents a macro tenside. Minimizing the amount of unreacted allylether monomer in commercial PCEs provides a solution to obtain a less foaming product.
Journal: Cement and Concrete Research - Volume 42, Issue 2, February 2012, Pages 484–489