Spinodal decomposition as a probe to measure the effects on molecular motion in poly(styrene-co-acrylonitrile) and poly(methyl methacrylate) blends after mixing with a low molar mass liquid crystal or commercial lubricant

Spherical nanoparticle effects on the lower critical solution temperature phase behavior of poly(ε‐caprolactone)/poly(styrene‐co‐acrylonitrile) blends: Separation of thermodynamic aspects from kinetics

“…In order to determine the “true” phase‐transition temperatures, the critical points determined from the G ′ slope change are linearly extrapolated to the ramp rate of zero . However, it is stated that the apparent phase‐transition temperatures versus the ramp rate deviate from a linear relationship by reducing the cooling/heating rates .…”

Morphology and properties of poly(styrene-co-acrylonitrile)/poly(methyl methacrylate)/zinc oxide composites

“…The ZnO loading of composite samples was 0.5, 1, 2 and 4 wt% based on ZnO content. After compounding, the composites were compressionmolded into standard dumbbell tensile bars and rectangular bars at 180 C for 30 min and pressure of 34.5 MPa, then temperature was decreased to 150 C and held for 20 min at the same pressure, which is still inside the miscible regime for this blend due to the cloud points or phase separation temperatures for SAN/ PMMA blends were reported to be above 200 C. 28 Therefore, the molding temperature of all samples was still below the phase separation temperature of the SAN/ PMMA blends. Moreover, the blend samples of SAN and PMMA without any ZnO were transparent, indicating a homogeneous miscible blend.…”

“…26 SAN/PMMA blends show the lower critical solution temperature behavior. [26][27][28][29][30] The phase diagrams of the PMMA/ SAN systems were determined by many methods such as cloud point measurement, laser light scattering and infrared microscopy. 31 Wacharawichanant et al 28 have studied the phase separation of SAN/PMMA blends and found that, from the cloud point temperatures measurements for blends containing SAN copolymers with about 25 wt% of AN, the critical composition should be between 10 and 20 wt% of SAN.…”

“…Additionally, the samples of SAN/PMMA blends were transparent, indicating a homogeneous miscible blend. Hence the mixture of PMMA and SAN forms a miscible blend [26][27][28]. The glass transition temperatures of 20SAN/PMMA/ ZnO composites at various SAN and ZnO content showed that the glass transition temperatures of the composites were not significantly changed when ZnO was incorporated in the polymer blends.…”

Ionic liquids as lubricants of metal -polymer contacts. Preparation and properties of the first dispersions of ionic liquids and nanoparticles in polymers

“…Estudios posteriores en mezclas de cristales líquidos cianoderivados y SAN o polimetilmetacrilato (PMMA) [101] demostraron que el principal efecto del cristal líquido era el incremento que se producía en la movilidad de las cadenas del polímero incluso para concentraciones tan bajas como el 0,2% en peso y cómo esta movilidad aumentaba con el contenido en cristal líquido.…”