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Formation of Plasma Polymer Layers with Functional Groups of Different Type and Density at Polymer Surfaces and their Interaction with Al Atoms
Author(s) -
Friedrich Jörg,
Kühn Gerhard,
Mix Renate,
Unger Wolfgang
Publication year - 2004
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200400008
Subject(s) - tetrafluoroethylene , polymer , monomer , acrylic acid , polypropylene , copolymer , materials science , composite number , polymer chemistry , functional polymers , density functional theory , functional group , aluminium , plasma , chemistry , composite material , computational chemistry , physics , quantum mechanics
Summary: Monotype functionalizations with different types of functional groups (OH, NH 2 , COOH) on polypropylene and poly(tetrafluoroethylene) surfaces were synthesized using pulsed plasma‐initiated homo‐ or copolymerization of functional group‐carrying monomers. The maximum concentrations of functional groups were 31 OH, 18 NH 2 or 24 COOH groups per 100 C atoms using allyl alcohol, allylamine or acrylic acid respectively as the monomer. The measured peel strengths of aluminium deposits increased linearly with the concentration of functional groups. Near the maximum concentration of OH (>27 OH/100 C atoms) or at moderate concentrations of COOH groups (>10 COOH/100 C atoms), constant (maximum) peel strengths were measured due to the mechanical collapse of one component in the composite (cohesive failure). Interface failures in Al‐PP composites were found with COOH, NH 2 and OH groups and cohesive failures were seen when higher concentrations of COOH groups were applied (>10 COOH/100 C atoms).Dependence of Al peel strength in Al‐plasma polymer‐PP systems on the type and density of functional groups in plasma polymer interlayers.