Some epoxidized polyurethane and polyester resins based on linseed oil

Motawie, A. M.; Hassan, E. A.; Manieh, Atef Aly; Aboul-Fetouh, M. E.; Eldin, Ahmed F. Serag

doi:10.1002/app.1995.070551302

Cited by 32 publications

(16 citation statements)

References 5 publications

(2 reference statements)

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“…1, however, a weak OH peak was observed, which indicated the existence of unreacted 4 due to an excess of 4 used. Other peaks derived from 4 units were observed in 5 which are from NO 2 …”

Section: Ft-irmentioning

confidence: 92%

“…The peaks from the protons of the CH 2 COO units (b) which are from 3 (4H) are found at both 4.0-4.1 ppm and 4.2-4.3 ppm at equal intensities. Also, the peaks from the protons of the CH 2 …”

Section: (2) Reactionmentioning

confidence: 99%

“…The positive environmental and economic attributes of plant oils have been utilised to synthesise polymers including polyurethanes [1,2] and polyesters [2,3]. Additionally, plant oils have been exploited in the creation of numerous products including coatings and inks [4,5,6,7,8], liquid resin moulds [9,10], plasticisers [10,11], hardeners [12,13], diluents [14], lubricants [15,16], and emollients [17].…”

Section: Introductionmentioning

confidence: 99%

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Dye conjugation to linseed oil by highly-effective thiol-ene coupling and subsequent esterification reactions

2015

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Linseed oil, a renewable material obtained from the ripened seeds of the flax plant, was conjugated with C. I. Disperse Red 1 to yield a coloured macromolecule in two experimentally-simplistic coupling steps. Firstly, the abundant presence of carbon-carbon double bonds in linseed oil was exploited to introduce carboxylic acid functionality to linseed oil via a thiol-ene reaction between linseed oil and 3-mercaptopropionic acid. C. I. Disperse Red 1 was then grafted to the carboxylic acid units now present via esterification, offering a coloured product in high yields. On average, 39.1% of the carbon-carbon double bonds in each linseed oil molecule were furnished with a C. I. Disperse Red 1 molecule. The remaining carbon-carbon double bonds may therefore be further exploited for chemical crosslinking, ensuring that the product formed is of potential significance as a coloured, bio-based, surface coating product.

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“…1, however, a weak OH peak was observed, which indicated the existence of unreacted 4 due to an excess of 4 used. Other peaks derived from 4 units were observed in 5 which are from NO 2 …”

Section: Ft-irmentioning

confidence: 92%

Section: (2) Reactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dye conjugation to linseed oil by highly-effective thiol-ene coupling and subsequent esterification reactions

2015

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“…The crosslink densities (ν e ) of these samples (C 1 , C 3 , C 5 , and C 7 ) are plotted in Figure 5. The crosslink density of C 1 is the highest and decreases with increasing oil contents upto sample C 5 . From sample C 5 onwards ν e start decreasing again which suggest that as the linseed oil contents increased beyond 50%, the degradation of linseed oil dominates.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 92%

“…This results in highly crosslinked small polymer chains. The samples B 5 (not shown in Figure 5) shows highest ν e and is more waxy than C 7 (LIN 60%). In considering the storage modulus plots of these polymers, it is observed that the storage modulus at high temperature (>50°C) is higher for samples containing less linseed oil and it decreases with increasing oil contents.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 96%

Synthesis and characterization of styrene-co-divinylbenzene-graft-linseed oil by free radical polymerization

Sharma¹,

Banait²,

Larock³

et al. 2008

Express Polym. Lett.

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A variety of opaque white to light yellow polymeric material have been prepared by two methods, one copolymerization of styrene (ST), divinylbenzene (DVB), and grafting of linseed oil (LIN), and the second involves the copolymerization of the same comonomers with pre-reacted (with initiator) linseed oil. All of the reactant mixtures in different concentrations start to solidify at 100°C and give rise to a solid crosslinked polymer at 130°C. These polymeric materials contain approximately 30 to 74% of crosslinked materials. Their 1H NMR spectra indicate that the polymeric samples contain both soft oily and hard aromatic segments. The insoluble material left after soxhlet extraction contains finely distributed micropores. The heat deflection temperatures (HDT) of the polymer samples range from 26 to 44°C. The glass transition temperature for different linseed oil polymer samples ranges from 66 to 147°C (from dynamic mechanical analysis) and 158 to 182°C (from differential scanning calorimetry). The crosslinking density of samples ranges from 35.0 to 6.01•104 mol/m3. Irrespective of methods, the storage modulus decreases with increasing oil content in the copolymers. The polymers prepared by the first method show minimum swelling in saline water and maximum swelling in tetrahydrofuran. On the other hand, the polymers from the second method show maximum swelling in alkaline solution and a minimum in acidic solution

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UV exposure and temperature effects on curing mechanisms in thin linseed oil films: Spectroscopic and chromatographic studies

Boyatzis

Ioakimoglou

Argitis

2002

J of Applied Polymer Sci

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ABSTRACT:The influence of thermal and photochemical treatment in the curing mechanisms of thin linseed oil films is studied. The role of copper acetate pigments is also investigated under the above conditions. UV and FTIR absorption spectroscopy and chromatographic product analysis are used as the main analytical techniques, which allowed the identification of significant changes in the curing mechanism in each case. Yellowing, crosslinking, and fragmentation inside the film material proceed to a different extent according to the conditions. Peroxide destruction is induced by UV exposure at early curing stages and affects the course of the yellowing process. Yellow product formation is also favored by curing at elevated temperatures, which is accompanied in this case by decreased crosslinking in the cured film.

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Some epoxidized polyurethane and polyester resins based on linseed oil

Cited by 32 publications

References 5 publications

Dye conjugation to linseed oil by highly-effective thiol-ene coupling and subsequent esterification reactions

Dye conjugation to linseed oil by highly-effective thiol-ene coupling and subsequent esterification reactions

Synthesis and characterization of styrene-co-divinylbenzene-graft-linseed oil by free radical polymerization

UV exposure and temperature effects on curing mechanisms in thin linseed oil films: Spectroscopic and chromatographic studies

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