Comparative Study Of The Effect Of PEG And
Crodamide On The Scratch Resistance Of PMMA
Author(s)
M. Mansha, C. Gauthier, P. Gerard & R. Schirrer
Abstract
Scratch durability of polymer surfaces and coatings is becoming crucial for the
growing use of these materials in innovative applications, replacing former
materials with more resistant surfaces. A variety of physico-chemical processes
such as annealing and a range of ion plantation techniques have been proved
very valuable for the renovation of polymeric surfaces but their applications are
restricted to some certain polymers due to a number of disadvantages. In
particular, several of them can not be applied to translucent polymers like
PMMA due to their darkening outcome. Enhancement of the scratch resistance
must be investigated for the most part as a consequence due to decreasing the
friction coefficient. The recovery increases if the tip is smooth or if the local
friction coefficient is low. Discovery of appropriate plasticizers for different
polymers to decrease their surface friction is yet to be made in order to improve
their scratch resistance.
The effect of PEG and crodamide on both surface properties and bulk
mechanical properties of PMMA was studied over a wide range of temperature
(ranging from -40 to +85°C). Our experimental results show that a decrease in
friction coefficient is possible by the introduction of appropriate plasticizer
without having a significant effect on its bulk behaviour and this decrease in
friction depends upon the nature and the content of plasticizer. Moreover, fatty
acid amides have been proved more effective in decreasing friction than PEG.
The friction decreases directly with the percentage of crodamide. The values of
the rear contact angle and in-situ photographs during scratching confirm that the
decrease in friction is associated with the decrease of yielding of the contact
between the tip and the polymer surface.
Keywords: scratch resistance, friction coefficient, polymer, PMMA, crodamide,
PEG, bulk properties.
Keywords
scratch resistance, friction coefficient, polymer, PMMA, crodamide,
PEG, bulk properties
Related Book
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