Poly copolymers, change absorbance

Figure 9. Change in UV Absorbance for Poly(phenyl-methyl-co-n-propyl-methylsilane) Copolymers at Their Respective 1MX as a Function of UV Exposure Time.

In another study poly(acrylic acid-g-styrene) copolymers were also shown to have good emulsifying ability and high water absorbency [105]. Membranes produced from intermolecular complexes of the above materials with poly(ethylacry-late-g-ethylene oxide) copolymers behaved like chemical valves, whose perme-ativity could be controlled reversibly by changing the pH of the surrounding medium, since both graft copolymers behave as polyelectrolytes in aqueous solution. 

Very recent work in our laboratories as yet unpublished has shown that poly(acrylonitrile) copolymer having properties suitable for fibers, when polymerized in the presence of a functionalized nanoclay, may absorb ammonium polyphosphate during filament extrusion and yield fibers with LOI > 35. In these fibers, a clear synergy between nanoclay and flame retardant is observed, and filament properties are little changed from those acceptable for normal textile applications. 

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