Comparative Studies on Alkyd Resins from Palm (Elaeis guineensis) Oil and Mango (Mangifera) Seed-Oil  

作　　者：Ifeoma Perpetua Oragwu Chigozie Nwankpa Azubuike Jeremiah Okolo Chinyere Emmanuella Okafor Ifeoma Perpetua Oragwu;Chigozie Nwankpa;Azubuike Jeremiah Okolo;Chinyere Emmanuella Okafor(Department of Pure/Industrial Chemistry, Chukwuemeka Odumegwu Ojukwu University, Uli, Nigeria;National Grid, Warwick, UK)

机构地区：[1]Department of Pure/Industrial Chemistry, Chukwuemeka Odumegwu Ojukwu University, Uli, Nigeria [2]National Grid, Warwick, UK

出　　处：《Open Journal of Polymer Chemistry》2024年第4期199-213,共15页高分子化学期刊(英文)

摘　　要：Mango seed and palm oils were modified by alcoholysis and esterification process, to form alkyd resin, which is generally used in surface coatings and adhesives. N-hexane was used to extract the mango seed oil, while, palm oil was manually isolated by pressing method after heating to softness. Some physio-chemical properties, like, percentage yield, saponification value, acid value, iodine value, refractive index, etc., were carried out according to standards to determine the suitability of the oils in bio-resin synthesis. The colour intensity of the alkyd resins were tested using Gardner scale, elasticity by viscometer, hardness, chemical resistance, and other properties of the alkyd resin were tested according to standard. The Infra-Red (IR) spectra of the raw oils and their respective alkyd resins were determined before modification. Palm oil alkyd resin exhibited a characteristic straight chain of ester functional group at 1738.64 cm−1 and aromatic (C=C) ring of ester at 1730.09 cm−1 while, mango seed oil alkyd resin showed spectrum of strong peaks at 11698 cm−1 with stretching frequency to 1240 cm−1, 1221 cm−1, 1188 cm−1, indicating the presence of a carbon atom single bonded to oxygen. The hardness, glossy tests, drying time, chemical resistance, etc., of the sample alkyd resins compared well to the commercial grade alkyd resin.Mango seed and palm oils were modified by alcoholysis and esterification process, to form alkyd resin, which is generally used in surface coatings and adhesives. N-hexane was used to extract the mango seed oil, while, palm oil was manually isolated by pressing method after heating to softness. Some physio-chemical properties, like, percentage yield, saponification value, acid value, iodine value, refractive index, etc., were carried out according to standards to determine the suitability of the oils in bio-resin synthesis. The colour intensity of the alkyd resins were tested using Gardner scale, elasticity by viscometer, hardness, chemical resistance, and other properties of the alkyd resin were tested according to standard. The Infra-Red (IR) spectra of the raw oils and their respective alkyd resins were determined before modification. Palm oil alkyd resin exhibited a characteristic straight chain of ester functional group at 1738.64 cm−1 and aromatic (C=C) ring of ester at 1730.09 cm−1 while, mango seed oil alkyd resin showed spectrum of strong peaks at 11698 cm−1 with stretching frequency to 1240 cm−1, 1221 cm−1, 1188 cm−1, indicating the presence of a carbon atom single bonded to oxygen. The hardness, glossy tests, drying time, chemical resistance, etc., of the sample alkyd resins compared well to the commercial grade alkyd resin.

关 键 词：Mango Seed Oil Palm Oil Alkyd Resin Properties ALCOHOLYSIS ESTERIFICATION 

分 类 号：TG1[金属学及工艺—金属学]