Poly(p-xylylene) and its derivatives by chemical vapor deposition: Synthesis, mechanism, and structure

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Simon, Peter ; Mang, Stefan ; Hasenhindl, A. ; Gronski, W. ; Greiner, Andreas:
Poly(p-xylylene) and its derivatives by chemical vapor deposition: Synthesis, mechanism, and structure.
In: Macromolecules. Bd. 31 (1998) Heft 25 . - S. 8775-8780.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma9808070

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Abstract

Poly(p-xylylene) (PPX) and its derivatives were prepared by vapor-phase pyrolysis and subsequent chemical vapor deposition (CVD) of the pyrolysis products. Readily available esters of alpha,alpha'-dihydroxy-p-xylylenes were utilized as starting materials. Mechanistical studies prove that 1,4-quinodimethane is formed by pyrolysis of diesters. The PPXs obtained compare well to PPXs obtained by the classical route using 2.2]paracyclophanes. C-13 CP-MAS NMR spectroscopy indicates that the arrangement of substituents along the polymer main chain is controlled by the size of substituents.