Crosslink Density Determination for Polymeric Materials.

摘要

Chemical crosslinking of polymeric binders is possibly the most significant factor affecting the mechanical behavior of unfilled and highly filled elastomers. There are basically two physical methods used by various investigators for experimentally determining the degree of crosslinking in elastomeric materials. These are the swelling method using Flory's equation and the equilibrium stress-strain method. The procedure discussed in the report is recommended as a tentative standard procedure to be followed in the collection of equilibrium stress-strain data and in the use of these data in the determination of the effective crosslink density of polymeric binders and composite propellants. (Author)