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MDP readily adhered to hydroxyapatite and this bond appeared very stable, as confirmed by the low dissolution rate of its calcium salt in water. [6] MDP, which effectively interacts chemically with hydroxyapatite and the calcium salt of which is hardly soluble, showed no signs of degradation in bond strength. Micro-tensile bond strength (μTBS ...
Lead styphnate (lead 2,4,6-trinitroresorcinate, C 6 HN 3 O 8 Pb ), whose name is derived from styphnic acid, is an explosive used as a component in primer and detonator mixtures for less sensitive secondary explosives. Lead styphnate is only slightly soluble in water and methanol. [3]
The post-bake process is applied at 180 to 320 °C for 30 to 240 min usually in a specific atmosphere or vacuum in the bond chamber. This is necessary to hard-cure the BCB. The vacuum prevents air trapped in the bond interface and pumps out the gases of the out-gassing residual solvents during annealing.
The roughened surface is rinsed with process water or an alkaline cleaner and is often sealed with a primer application like Silane A-187 or alkoxide. [7] Application of the primer can be achieved through manual means, like a brush. It can also be sprayed on the roughened surface or the whole assembly can be dipped in a primer solution and cured.
Primasheet is a rubberized sheet explosive identical to Detasheet. Manufactured by Ensign-Bickford Aerospace & Defense Company Primasheet comes in two varieties: Primasheet 1000 is PETN based and Primasheet 2000 is RDX based. Both are waterproof and are supplied in continuous rolls. [1]
d) Primer system is designed to increase critical surface tension of dentin, which gets decreased after etching of acid. e) Bonding mechanism is when: Primer and bonding resin are applied to etched dentin, they penetrate the intertubular dentin, forming hybrid layer. They also penetrate and polymerize in open dentinal tubules, forming resin tags.
An MDL Molfile is a file format for holding information about the atoms, bonds, connectivity and coordinates of a molecule.. The molfile consists of some header information, the Connection Table (CT) containing atom info, then bond connections and types, followed by sections for more complex information.
During this process, the ingredients of the molten mix are dispersed thoroughly. Because of the fast operation of the extruder and relatively low temperature within the barrel, the epoxy and hardener components will not undergo a significant chemical reaction. The molten extrudate then passes between cold-rollers and becomes a solid, brittle sheet.