000			01354nam a2200205Ia 4500
008			220216s9999 xx 000 0 und d
100			_aAigbodion A I
245		0	_aSynthesis and molecular weight characterisation of rubber seed oil-modified alkyd resins
260			_bJournal of Applied Polymer Science _c2001
300			_a2431-38
500			_aSource Year: 2001
520			_aAlkyd resins of 40;, 50;and 60;oil length (OL) are prepared with rubber seed oil (RSO), phthalic anhydride (PA) and glycerol (GLY), employing the two-stage alcoholysis method. Changes in the , physical characteristics of the reaction medium are monitored by determination of the acid value and the number-average molecular weight, Mn, of in-process samples withdrawn at different stages of the reaction. The mode of variation of these properties denotes that the preparation of RSO alkyds is complex. Molecular weight averages and the molecular weight distribution (MWD) of the finished alkyds are determined by GPC, cryoscopy and end-group analysis. Molecular weight averages and the MWD vary with differences in the formulation, with sample II exhibiting the narrowest size distribution.
650			_aAlkyd resins
650			_aMolecular weight
650			_aRubber seed
650			_aRubber seed oil
700			_aPillai C K
856			_uRAPRA
942			_cJS
999			_c70138 _d70138