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Para-aramid fiber is a kind of man-made high-performance aramid fiber, with molecules that are characterized by relatively rigid polymer chains. It is produced by p-phthaloylchloride (TPC) and p-phenylenediamine (PPD) an...

Dental adhesives are designed to bond composite resins to enamel and dentin. Dental sealants are dental treatment intended to prevent tooth decay. Dental sealants are materials placed in pits and fissures to fill them i...

ABS is a kind of polymer obtained through the copolymerization of three kinds of monomers, namely acrylonitrile, butadiene and styrene. Each of these three monomers has a specific property: the addition of acrylonitrile ...

A safe and reliable pitch system is critical for the wind turbineƍs performance and power production.Wind turbine pitch control system can change incidence of rotor blades in a wind power generation system based on real...

Waterproofing is the combination of materials used to prevent water intrusion into the structural elements of a building or its finished spaces. Its main purpose is to resist hydrostatic pressure exerted by moisture in t...