Thermal conductivity and Kapitza resistance of cyanate ester epoxy mix and tri-functional epoxy electrical insulations at superfluid helium temperature

Optimalization of the Thermal Curing of Epoxy Based Insulations

There is difficult to imagine modern production of electrical devices without components containing organic substances. This fact is mainly concerned to composite materials, in which the bond component is made of organic substance. The intricate curing reactions have been proceeding during the composites technological curing as well as during the device operation, where mostly the thermal-oxida...

Kapitza resistance and the thermal conductivity of amorphous superlattices

Mutual Friction and the Thermal Conductivity of Superfluid Helium Near

Temperature gradients in superfluid helium carrying a heat current in a 13.8-ram-wide tube or in a O.l-mm-wide slit have been measured at 0.09 m°K < T z T < 16 m°K. The results are interpreted in terms of a mutual friction force between the normal component of He II and vortices in its counterflowing superfluid component. This force is found to diverge near Tz with a mutual friction constant pr...

Effects of Chemical Structure Changes on Curing Reactions and Thermal Properties of Cyanate Ester-Cured Rigid-Rod Epoxy Resins

How chemical structure changes affect the curing reactions and thermal properties of 2,2 -bis(4-cyanatophenyl) propane (cyanate ester) cured rigid-rod epoxy resins has been studied for biphenol and tetramethyl biphenol epoxies. The formation of an oxazolidinone ring is the dominant curing reaction for biphenol epoxy, whereas the formation of a cyanurate ring is the dominant curing reaction for ...

Characterization of advanced cyanate ester/epoxy insulation systems before and after reactor irradiation

Insulation systems for fusion magnets have to operate in a harsh environment, especially also under intense radiation. Over the past years, cyanate ester (CE) resins have been playing an increasingly important rolebecauseof their enhanced temperatureandradiation resistancecompared toconventional epoxy resins. Blending CEwith epoxy resins offers the possibility tomanufacture radiation resistant ...