TY - JOUR
T1 - Modification of chitosan as chemical admixture for cement pastes
AU - Bekbayeva1, Lyazzat
AU - Negim, El-Sayed
AU - G, Yeligbayeva
AU - Ganjian, Esmaiel
N1 - Free access article
PY - 2020/6/28
Y1 - 2020/6/28
N2 - THREE in the presence different of composition potassium ratios persulphate of chitosan-g- as an initiator acrylic using acid, P[Ch-g-AA] free radical technique. were prepared The grafted copolymers were characterized through FT-IR, TGA, DSC, and SEM. The results showed that these grafted copolymers have a single glass transition indicating that these copolymers can form a miscible phase. The P[Ch-g-AA] exhibit thermal stability. SEM of the grafted copolymers showed no phase separation, when compared with the pure Ch. The effect of grafted copolymers on the physico-mechanical properties of cement pastes was investigated. The addition of water mixed with grafted copolymer to the cement, improves properties of cement pastes. As the ratios of AA in the grafted copolymer increases, the water-to-cement (WC) ratio, setting time as well as water absorption decreases. While The compressive strength was sharply increased at nearly all hydration ages.
AB - THREE in the presence different of composition potassium ratios persulphate of chitosan-g- as an initiator acrylic using acid, P[Ch-g-AA] free radical technique. were prepared The grafted copolymers were characterized through FT-IR, TGA, DSC, and SEM. The results showed that these grafted copolymers have a single glass transition indicating that these copolymers can form a miscible phase. The P[Ch-g-AA] exhibit thermal stability. SEM of the grafted copolymers showed no phase separation, when compared with the pure Ch. The effect of grafted copolymers on the physico-mechanical properties of cement pastes was investigated. The addition of water mixed with grafted copolymer to the cement, improves properties of cement pastes. As the ratios of AA in the grafted copolymer increases, the water-to-cement (WC) ratio, setting time as well as water absorption decreases. While The compressive strength was sharply increased at nearly all hydration ages.
KW - Chitosan
KW - Acrylic acid
KW - Grafting polymerization
KW - Portland Cement
UR - https://ejchem.journals.ekb.eg/article_69922.html
UR - http://www.scopus.com/inward/record.url?scp=85087775976&partnerID=8YFLogxK
U2 - 10.21608/EJCHEM.2019.18136.2107
DO - 10.21608/EJCHEM.2019.18136.2107
M3 - Article
VL - 63
SP - 1497
EP - 1508
JO - Egyptian Journal of Chemistry
JF - Egyptian Journal of Chemistry
SN - 0449-2285
IS - 4
M1 - 24
ER -