Daneshmehr, Shahla published the artcileThe surface modification of boron nitride particles, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is boron nitride surface modification.
The use of coupling agents to enhance the thermal conductivity of composites of epoxy and boron nitride (BN) has been investigated. Two types of BN particles, lightly aggregated platelets with an average size of 6μm and agglomerates with an average size of 120μm, have been used. Different proportions of these BN particles, up to a volume percentage of approx. 34%, were mixed with a stoichiometric epoxy-thiol system and cured either isothermally or non-isothermally. The cure kinetics was investigated by differential scanning calorimetry, and the thermal conductivity of isothermally fully cured samples was measured. The effect of surface treatment of the particles was extensively investigated, with respect to the characteristics of the particles themselves, the cure kinetics and the thermal conductivity of the cured composites. The BN particles were treated with a silane coupling agent, both with and without previously treating the BN with a sodium hydroxide solution IR spectroscopy and thermogravimetric anal. were used to assess whether or not the silane had been attached to the BN particles, and the effect of the surface treatment on the cure kinetics was studied. Although the cure kinetics suggested that the surface treatment was more effective for the 6μm particles than for the 120μm agglomerates, it did not generally lead to an increase in the thermal conductivity, while SEM showed that the coupling agent was not attached to the BN particles. It is concluded that truly platelet-shaped particles are necessary for effective surface treatment.
Journal of Thermal Analysis and Calorimetry published new progress about Glass transition temperature. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).
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