Effect of silicone oil on the morphology and properties of polycarbonate

Abstract

Two types of silicone oil, poly(dimethyldiphenyl siloxane) (PDMDPS) and poly(dimethyl siloxane) (PDMS), were added to polycarbonate (PC), and the morphological, mechanical, rheological, and thermal changes of the PC/silicone oil were investigated. A scanning electron microscope showed that the dispersed droplets of the silicone oils in the PC matrix and the size of the dispersed phases were enlarged with increasing amounts of silicone oil. A transition from brittle to ductile failure was observed with increasing PDMDPS. The impact strength of neat PC at 2308C was 8 kg f cm/cm, which increased to 52 kg f cm/ cm with the addition of PDMDPS. It appears that, at low temperature, the phenyl group in PDMDPS is more effective for toughening. A higher decomposition temperature and the bulkier molecular structure of PDMDPS, compared to PDMS, resulted in a smaller increase in the melt flow index of PC/PDMDPS than for PC/PDMS. The glass transition temperature, initiation temperature of thermal weight loss, and heat distortion temperature of PC/silicone oil systems were decreased with an increase in the silicone oil. The blending of PC with PDMDPS provided a practical way to develop a combination of high tensile strength and impact strength at a low temperature with applicable comprehensive properties.

Compatibilization of Polycarbonate/Silicon Rubber Blend with Styrene/Silicon Oil/Acrylonitrile Ternary Copolymer for Ultra-High Low-Temperature Toughness

“…Furthermore, Table compares the low-temperature toughening effect between this work and other reported results. Among them, the PC/Sr/P­(St-SiO-An) blend highlights a significantly enhanced low-temperature impact strength along with a comparable yield strength that is equivalent to that of pure PC, when compared with those of all other PC toughening systems. ,,− This demonstrates a superior toughening effect and balanced toughness-stiffness achieved by a relatively lower additive level of the low-modulus Sr toughener.…”

Hydrophobic and oil‐resistant coatings based on advanced green polyurethane dispersions

“… with the help of microscopy images. Number of researchers have shown that PDMS polyol and fluoro polyol contributes to phase separation and can affect impact resistance of their films. It is interesting, however, that the cross‐cut adhesion was not affected by this possible phase morphology.…”

Conducting Polymer Nanostructures and their Derivatives for Flexible Supercapacitors

“…CPs are organic polymers that conduct electricity through a conjugated bond system along the polymer chain. In the past decades, the CPs are extensively explored for flexible supercapacitor application due to their reversible faradic redox nature, high charge density and lower cost as compared with the expensive metal oxides ,,,. Among all kinds of CPs, polyaniline,, polypyrrole, and poly(3,4‐ethylenedioxythio phene) have been widely studied as active electrode materials for flexible SCs due to their high flexibility, ease in fabrication and high pseudocapacitance.…”

“…Unfortunately, the poor cycle stability of CPs greatly restricts its practical utilization . Approaches to the fabrication of composite electrodes combining CPs with carbon materials can offer an effective solution to overcome some of the drawbacks of the CPs based pseudocapacitors ,. A number of binary composite materials based on CPs combined with carbon nanotubes, graphene, and carbon cloth, have been demonstrated high stable supercapacitive performance, which is mainly attributed to the enhanced conductivity of the conducting polymer composites by carbon materials integration, and also because of accessibility of carbon nanostructures in various forms.…”