The Size of the Alkyl Group R is the Principal Factor Determining the Wettability of Surface-Functionalized Polyethylenes (PE-CONHR and PE-CO2R) by Water.

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Abstract:

Advancing contact angles Theta a were measured for a series of surface-functionalized polyethylene films bearing ester -CO2CnH2n1and amide -CONHnH2n1 groups having different sizes of alkyl group. The influence of the polar ester or amide functionality on Theta a is no longer detectable for alkyl groups having n or 6. The size of the alkyl group required to shield a polar functional group at the surface of the polymer from the contacting water inferred from these experiments is remarkable similar to that observed previously with the more highly ordered, self-assembled monolayers of omega-mercapto ethers HSCH216OCnH2n1 on gold. aw

Author(s):
Wilson, Mark D. ; Ferguson, Gregory S. ; Whitesides, George M.
Author Organization(s):
HARVARD UNIV CAMBRIDGE MASS DEPT OF CHEMISTRY
Descriptive Note:
Interim rept.,
Pagination:
0016

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-24
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ALKYL RADICALS, *POLYETHYLENE, *WETTING, ANGLES, ESTERS, GOLD, POLARITY, SIZES(DIMENSIONS), WATER, AMIDES, POLYMERIC FILMS, SURFACES
Field(s)/Group(s):
Polymer Chemistry, Physical Chemistry, Organic Chemistry
Report Date:
1989 Nov 01