Hedrick

D. R. Gere, C. R. Knipe, P. Castelli, J. Hedrick, Randall Prank, L. G., H. Schulenberg-Schell, R. Schuster, L. Doherty, J. Orolin and H. B. Lee, Bridging the automation gap between sample prepai ation and analysis an ovei view of SEE, GC, GC-MS and HPLC applied to envu onmental samples , 7. Chromatogr. Sci. 31 246-258 (1993). 

Recently, a poly(heteroarylene sulfide) formed by the reaction between bis(thiophenols) and bis(6-chlorophe-nyl quinoxalines) has been reported by Hedrick et al. [58]. 

Hedrick et al. reported imide aryl ether ketone segmented block copolymers.228 The block copolymers were prepared via a two-step process. Both a bisphenol-A-based amorphous block and a semicrystalline block were prepared from a soluble and amorphous ketimine precursor. The blocks of poly(arylene ether ether ketone) oligomers with Mn range of 6000-12,000 g/mol were coreacted with 4,4,-oxydianiline (ODA) and pyromellitic dianhydride (PMDA) diethyl ester diacyl chloride in NMP in the presence of A - me thy 1 morphi 1 i nc. Clear films with high moduli by solution casting and followed by curing were obtained. Multiphase morphologies were observed in both cases. 

J. L. Hedrick and J. W. Labadie, Step-Growth Polymers for High-Performance Materials New Synthetic Methods, ACS Symposium Series 624, American Chemical Society, Washington, DC, 1996. 

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