The nanocomposites from conjugated linseed oil, acrylic acid, and divinylbenzene are synthesized using modified montmorillonite clay and characterized for thermal properties. The wide angle X‐ray diffraction results clearly show the distortion of the platy nanolayers of the nanofiller in the polymer matrix as the peak due to the clay disappears in the nanocomposite samples. The dynamic mechanical analysis results show the enhanced storage modulus and transition temperature compared with the pristine polymer. At the glass transition temperature, the storage modulus of nanocomposites is in the range of 17–79 MPa, whereas the pristine polymer shows a storage modulus of 2.1 MPa. The melting peak temperature ranges from 230 to 260°C, which is further confirmed by thermogravimetric analysis (TGA) results. The samples are stable up to 200°C and show a two‐stage degradation. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers

The solvent-resistance properties of the montmorillonite-filled conjugated linseed oil-based nanocomposites are studied in tetrahydrofuran through equilibrium swelling method at different temperatures. The values of "n" in solvent transport equation are found to be below "0.5," showing the non-Fickian diffusion in the polymer. The dependence of the diffusion coefficient on the composition, percentage of clay, and temperature has been studied for nanocomposite samples. The diffusion coefficient increases with an increase in the clay contents and temperature. The crosslink density of the nanocomposites ranges from 101.07 to 237.46 Â 10 6 mol/cm 3 .

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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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.