Swelling kinetics of linseed oil‐based polymers

Abstract

Kinetics of swelling and sorption behavior of copolymers (based on linseed oil, styrene, divinylbenzene, and acrylic acid via cationic and thermal polymerization) is studied in tetrahydrofuran (THF) at different temperatures. The values of n in the transport equation are found to be below 0.4, showing non-Fickian or pseudo-Fickian transport in the polymers. The dependence of diffusion coefficient on the composition and temperature has also been studied for the linseed oilbased polymers. The diffusion coefficient in cationic samples decreases with an increase in the oil contents in the samples. In case of thermal samples, the diffusion coefficient first increases up to 30% oil contents and then decreases. The diffusion coefficient decreases with an increase in temperature for all of the linseed oil polymer samples. The sorption coefficient increases with an increase in the oil contents for all samples. The crosslink density (calculated from the THF swelling) ranges from 20.16 to 92.34 Â 10 6 mol/cm 3 for cationic samples and 20.62 to 86.01 Â 10 6 mol/cm 3 for thermal samples.

Soy-castor oil based polyols prepared using a solvent-free and catalyst-free method and polyurethanes therefrom

“…Therefore, the choice of polyol typically determines the properties of the created polyurethane. 4 In addition to petroleum-based polyols, vegetable oils, such as soybean oil, 5 canola oil, 6,7 palm oil, 8,9 sunflower oil, corn oil and linseed oil, [10][11][12] have been extensively studied as bases for various polyols used for the manufacture of PUs with high thermal stability and mechanical properties. However, almost all these vegetable oil-based polyols were prepared using large amounts of solvents, which increases both process cost and environmental burden.…”

Rice hull biocomposites, part 2: Effect of the resin composition on the properties of the composite

“…Linseed oil monoglyceride maleates have been co‐polymerized with styrene (ST) to form a matrix for wood flour composites 2. Clay composites have also been prepared using a matrix where conjugated linseed oil (CLO) was co‐polymerized with divinylbenzene (DVB) and acrylic acid (AA),3 and a similar resin, containing linseed oil, DVB, ST, and AA, has also been studied 4. Linseed oil has also been used as the starting material in the preparation of an AA‐esterified monomer for later co‐polymerization with ST 5.…”

Swelling kinetics of linseed oil‐based nanocomposites

“…On increasing the oil contents in the polymers, the solvent uptake decreases in the matrix. Generally, with increasing oil contents in the polymer, crosslinking density decreases, leading to an increase in the solvent uptake 27. In this case, the decrease in the solvent uptake with an increase in the oil contents can only be explained with a possible increase in the crosslink density, due to the presence of the fixed amount of nanofiller in the composition.…”

“…The samples with 30 and 60% oil contents show a minimum and maximum sorption coefficient, respectively. When the clay contents are varied from 0 to 10%, the samples without clay27 and with 7.5% clay content show a minimum and a maximum sorption coefficient, respectively.…”