MACROSCOPIC PROPERTIES OF NOVEL CORROSION RESISTANT AND TAMPER EVIDENT
VISCOELASTIC POLYMERS, BASED ON HYBRID CYCLIC PHOSPHAZENE MATERIALS
Abstract
Three novel materials have been developed based on
hexachlorocyclotriphosphazene and octachlorocyclotetraphosphazene. The
core phosphazene ring is substituted with varying ratios of fluorinated
side groups and with 4-hydroxybenzaldehyde to allow a Schiff base
reaction with diaminodiphenylmethane (DDM) to form a cyclomatrix or
cyclolinear polymer compound. These compounds give excellent water
repellence combined with good adhesion and viscoelasticity. In addition,
the new materials undergo a surface reaction on exposure to atmosphere
such that subsequent disturbance of the surface causes virgin material
to become exposed giving clear evidence of such disturbance.