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Content available UV polymerization and property analysis of maleacylated methyl cellulose acrylic acid absorbent resin
Li Ying, Sawut Amatjan, Hou Gongbo, He Mingyu, Yimit Mamatjan
Polish Journal of Chemical Technology
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2020
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Vol. 22, nr 2
34--41
EN
In this paper, maleic anhydride (MA) was grafted onto methyl cellulose (MC) and then reacted with acrylic acid to synthesize a high gel strength and fast water absorption resin (AA-co-MC-g-MA) by UV polymerization. The reaction conditions of maleylated methylcellulose (MC-g-MA) were investigated, including the ratio of MC to MA, reaction time and catalyst amount. In addition, the reaction conditions for the synthesis of super absorbent resin were as follows: the amount of MC-g-MA, the degree of substitution of MC-g-MA, polymerization time, and the amount of initiator. Under optimal conditions, the maximum water absorption volume of synthetic resin was 2116 g/g, and the maximum salt absorption rate was 139 g/g. The water absorption resin prepared this time had high water absorption, water retention, excellent pH sensitivity, etc. It was hoped that it will have a good application prospect in the field of industrial production and agriculture in the future.
2
Content available Effects of coupling agent on antioxidant properties and structure of PP/ cotton stalk lignin composites
He Mingyu, Musajian Dilhumar, Hasan Gvlmira, Hou, Gongbo, Yimit Mamatjan
Polish Journal of Chemical Technology
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2020
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Vol. 22, nr 2
78--85
EN
In this paper, the effects of coupling agent and lignin extracted from waste cotton stalks in Xinjiang on thermaloxygen aging properties of polypropylene (PP) composites were studied. The melt index test and indoor thermal oxygen aging test was carried out on the samples treated with coupling agent. The mechanical properties, surface micromorphology, rheological properties and element composition of the materials before and after 30 days of aging were studied. The results showed that the titanate coupling agent was the best for improving the melt index and mechanical properties of PP/cotton stalk lignin composites. After the 30-day thermal oxygen aging test, the samples with 2% lignin had the best impact strength and retention rate of fracture elongation, reaching 68.9% and 77.3% respectively. The sample with 3% lignin content had the smoothen surface, no crack appeared. After aging, the increase of C=O was the least, and the crystal peak area decreased less.
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