caa a22 4500 445385405 CHVBK 20180317143031.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10924-011-0303-7 doi (NATIONALLICENCE)springer-10.1007/s10924-011-0303-7 Palm Oleic Acid Based Alkyds: Effect of the Fatty Acid Content on the Polyesterification Kinetics [Elektronische Daten] [Shahla Ataei, Rosiyah Yahya, Seng Gan] The kinetic behavior of polyesterification of the alkyd resins synthesized using glycerol and phthalic anhydride modified with oleic acid from the palm oil at temperatures between 120 and 240°C was studied. Three alkyds having oleic acid contents of 28, 40, and 65% were prepared by employing fatty acid method. The extent of the polyesterification reaction and average degree of polymerization were monitored by determining the acid number of the aliquot of the reaction mixture at various intervals of time and by measuring the volume of water evolved. Kinetic studies revealed that initial reaction rates followed a second-order kinetics up to certain limit and thereafter deviations were observed. The extent of reaction varied from 77.4 to 86.3% before deviation for all the three samples and exhibited a considerable degree of conversion. The second-order rate constants calculated from the linear part were found to be of the order of 10−5g (mg KOH)−1min−1. Molecular weight of the alkyd samples was determined by GPC; number average molecular weight of the alkyds ranged from 980 to 2,070. Springer Science+Business Media, LLC, 2011 Palm oleic acid nationallicence Polyesterification nationallicence Kinetic studies nationallicence Extent of reaction nationallicence Molecular weight nationallicence Ataei Shahla Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Yahya Rosiyah Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Gan Seng Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/2(2011-06-01), 540-545 1566-2543 19:2<540 2011 19 10924 https://doi.org/10.1007/s10924-011-0303-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-011-0303-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ataei Shahla Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Yahya Rosiyah Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Gan Seng Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/2(2011-06-01), 540-545 1566-2543 19:2<540 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer