polymer matrix composites:
the most common matrix materials for composites are polymeric.In general the mechanical properties of polymers are inadequate for many structural purposes. in particular their strength and stiffness are low compared with metals and ceramics.this meant that there was a considerable benefit to be gained by reinforcing polymers and that the reinforciment,initially at least did not have to have exceptional proprties.
(composite metarials,F.L.Matthews,Rees D. Rawlings, p. 168 )
pulforming:
this process was developped for the NASA shuttle stiffener ring. reinforcing fibres are drawn through a tank for resin impregnation and then through a die.pulforming may be curved or straight. a composite hammer handle is made on straight pulforming equipment.
(handbook of polymer blends and composites,A.K. Kulshrestha,Cornelia Vasile, p.29)
preform molding:
in preform molding,a dry mat of the reinforcing material is preformed to the approximate shape of the part and placed into the open mold.Resin is added to the preform, and the mold halves are then pressed together and heated to cure the part. During the process the resin flows, imregnating the preform, and becomes hard. The cured part is removed after the mold is opened(often with the assistance of knouck out pins that are built into the mold).
( Handbook of Composite Reinforcements,Stuart M. Lee,p.323 )
electrolysis
The following remarks on electrolysis are intended simply as an aid to those who have to make an occasional electrolytic determination of copper, nickel, or bismuth is described, and a few general directions are given as to manipulation and the attainment of the proper conditions.
(Technical methods of ore analysis, Albert Howard Low.p.10)
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