Kinetics of the preparation of rubber seed oil alkyds

Aigbodion, A. I.; Okieimen, F. E.

doi:10.1016/0014-3057(96)00053-5

Cited by 48 publications

(41 citation statements)

References 9 publications

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“…In confirmation of the above, the acid value for all the samples decreased with increase in oil length, consistent with high amounts of di-and triglyceride present in the reaction mixture and the concentration of the acid anhydride (Onukwli & Igbokwe, 2008). However, in polyesterification reactions, the reactivity of the functional group does not depend on the size of molecule to which it is attached (Aigbodion & Okieimen, 1996).…”

Section: Resultsmentioning

confidence: 99%

“…The first region of these plots shows the period when the primary hydroxyls of glycerol reacted with carboxyl groups of phthalic anhydride leading to formation of linear chains. Immediately the primary hydroxyl groups are esterified, there is an abrupt drop in acid value and the reaction slackens until a temperature is reached when the secondary hydroxyl groups begin to react (Aigbodion & Okieimen, 1996). Thus, the increasing D p of the alkyd chains results in increasing viscosity of the reaction medium.…”

Section: Resultsmentioning

confidence: 99%

“…The mole ratio of XASO: Glycerol of 1:2 for 40% oil length alkyd suggests higher initial concentration of α-monoglyceride formed in-situ and decreases as the oil length increases. Aigbodion and Okieimen (1996) reported that the rate constants for rubber seed oil range from 1.92-4.08 x 10 -5 g (mg KOH) -1 min -1 for oil length of 20-60%. Similarly, for locust bean seed oil, k values were in the range, 5.98-12.51 x 10 -5 g (mg KOH) -1 min -1 .…”

Section: Resultsmentioning

confidence: 99%

“…Table 3 shows the formulation of four grades of alkyd resin prepared with glycerol, phthalic anhydride and Ximenia americana seed oil. Monoglyceride of each grade was first prepared by heating a mixture of oil, glycerol and small quantity of CaO (Catalyst) in a 2-litre three necked round bottom flask fitted with a Dean and Stark having necessary accessories that will allow the reaction progress (Aigbodion & Okieimen, 1996). This mixture was heated by heating mantle to 200 ºC and maintained at this temperature for 2 hours after which a small quantity of the aliquot was taken to check for solubility in methanol indicating formation of the monoglyceride.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Formation and Characterization of Paint Based on Alkyd Resin Derivative of Ximenia americana (Wild Olive) Seed Oil

Oladipo¹,

Eromosele²,

Folarin³

2013

ENRR

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Alcoholysis-polyesterification method was used in the investigation of utilization of Ximenia americana seed oil in the formulation of alkyd resins. The extracted oilseed gave an oil yield of 45.7% (w/w) and the physicochemical characterization indicated it is semi-drying in nature with iodine value of 152.3 g I 2 100 g -1. The fatty acid analysis of the oil carried out earlier revealed oleic and linolenic as dominant fatty acids, having values of 72.1 and 10.3% respectively. Four grades of alkyds were formulated at 40% (I), 50% (II), 60% (III) and 70% (IV) oil lengths. The reaction progression was followed by determining the acid value of the aliquots for the reaction mixture at various time intervals beside the volume of water evolved. Kinetic studies showed that the reaction was second-order with values of 3.12 x 10 -4 , 2.44 x 10 -4 , 2. The 40 and 50% oil length alkyd films were resistant to acid, brine and water with little resistance to alkali. Characterization of paint based on two alkyd resin derivatives, 40 and 50% oil lengths, gave values for surface drying and tack-free property of less than 2 and 5 hours respectively in respect of the 40% oil length.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Formation and Characterization of Paint Based on Alkyd Resin Derivative of Ximenia americana (Wild Olive) Seed Oil

Oladipo¹,

Eromosele²,

Folarin³

2013

ENRR

View full text Add to dashboard Cite

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“…Solomon and Swift [8] who studies 50% oil length alkyd resins found the reaction did not follow either second or third-order kinetic. Aigbodion and Okieimen [9] studies the kinetics of the preparation of rubber seed oil alkyd and found that the initial reaction rates follow second order kinetics with deviation at the later stage of reaction. Igwe and Ogbobe [10] carried out similar study, using melon seed, rubber seed oil, linseed and soyabean oil.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study on the Polyesterification and Copolymerisation Process of Unstyrenated and Styrenated Palm Kernel Oil Based Alkyd Resin

NJ¹,

OD²

2015

J Chem Eng Process Technol

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The kinetics of the preparation of unstyrenated and styrenated palm kernel oil based alkyd resins were studied using polycondensation and copolymerization process. Three alkyd resins A, B, and C of medium oil length were prepared using phthalic anhydride, maleic anhydride, and glycerol at stipulated ratios. The prepared alkyd resins were copolymerized with styrene using benzyol peroxide as an initiator at 150°C for 3 hr. The kinetic behavior of the polyesterification and copolymerization process and the resulting alkyd resins and styrenated alkyd resins were studied as a function of viscosity and the reaction time using integral method of analysis. The results showed that the resins A and B followed the first order reaction while resin C followed the second order reaction with rate constants of 13 × 10 -3 min -1 , 30 × 10 -3 min -1 , and 3 × 10 -3 (Pa.S)(min) -1 respectively. For styrenated alkyds, kinetic study confirmed that styrenated alkyd A followed the first order kinetics and styrenated alkyds B and C followed the second order kinetics with rate constants of 8 × 10 -3 min -1 , 6 × 10 -4 (Pa.S)(min) -1 , and 6 × 10 -4 (Pa.S)(min) -1 respectively.

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Estimation of dilute solution viscosity parameters of rubber seed oil alkyds

Okieimen

Aigbodion

1998

J. Appl. Polym. Sci.

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Viscosity measurements were carried out in methyl ethyl ketone (MEK) and dimethyl formamide (DMF) for rubber seed oil alkyds having oil content of 20 (I), 30 (II), 35 (III), 40 (IV), 50 (V), and 60% (VI). Viscosity molecular weights, intrinsic viscosities, and viscosity parameters K and a, characteristic for both polymers and solvents, were determined. Generally, solubility properties were found to depend on molecular weight and polarity of the alkyds and solvent. Intrinsic viscosities of the alkyds were larger in DMF than in MEK, suggesting DMF to be a better solvent than MEK for rubber seed oil alkyds. Molecular weights determined for the alkyds range from 441 for sample III to 1323 for sample V. The viscosity molecular weights are in reasonable agreement with the values determined for samples II-V in MEK and samples I-IV in DMF. The values of Huggin's constant for these alkyds were also determined. Data reported also suggest that rubber seed oil alkyds tend to tolerate relatively basic solvent, such as DMF. Fractionation of the alkyds was considered to be in respect of molecular weight and polarity of the alkyds, and results show that low-molecularweight species constitute greater proportion of the alkyds.

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Kinetics of the preparation of rubber seed oil alkyds

Cited by 48 publications

References 9 publications

Formation and Characterization of Paint Based on Alkyd Resin Derivative of Ximenia americana (Wild Olive) Seed Oil

Formation and Characterization of Paint Based on Alkyd Resin Derivative of Ximenia americana (Wild Olive) Seed Oil

Kinetic Study on the Polyesterification and Copolymerisation Process of Unstyrenated and Styrenated Palm Kernel Oil Based Alkyd Resin

Estimation of dilute solution viscosity parameters of rubber seed oil alkyds

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