Dechlorinated HERCLOR

RESULTS FROM CLEAVAGE OF DECHLORINATED HERCLOR H ELASTOMER... 

Figure 4. Gas chromatogram of cleavage mixture from dechlorinated HERCLOR H elastomer...

HERCLOR H elastomer was readily dechlorinated by treatment with excess lithium aluminum hydride [LAH] (2.5 moles/mole of Cl) in tetrahydrofuran at SO C. Unreacted hydride was quenched with water, and the polymer samples were isolated for chlorine analyses. The observed pseudo-first-order rate constant for the disappearance of chlorine was found to be 1.9 x 10" minT under these conditions (Fig. 1). 

Further confirmation of the uniformly head-to-tail structure of HERCLOR H elastomer was obtained from its carbon-13 NMR spectrum. Since no literature spectra of polyepichlorohydrin were available for comparison, the carbon-13 NMR spectra of the poly-(propylene oxideD resulting from dechlorination with LAH were also examined. Published spectra of poly(propylene oxideD with detailed peak assignments are available. 

Figure 7. Carhon-13 NMR spectra of (A) HERCLOR U elastomer and (B) the poiy(propylene oxide) obtained by dechlorination with LAH...

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