42nd Annual Waterborne Symposium
via EIS can occur due to water ingress as well as changes in bar-
rier protection. The current densities measured by SVET can
provide a quantitative measurement of the rate of corrosion.”
The presentation featured a review of electrochemical tech-
niques for corrosion and material degradation assessment, along
with real-world results of the use of those techniques to study a
next generation powder coating.
Koerner explained that formulators understand that im-
proved application can be achieved by modifying the shear rhe-
ology of paint to be somewhat pseudoplastic and thixotropic.
Axalta Coatings has been interested to find methods to measure
extensional rheology that we believe more directly relates to
paint atomization. “When these methods are fully developed,
we believe formulators can more precisely tune paint rheology
for optimal application,” he said.
Studies using the Capillary Breakup Extensional Rheometer
(CaBER) have been used to demonstrate capillary thinning and
filament formation. This is consistent with observed droplet
formation during paint spray. He said that Axalta recognizes
some limits to this approach as a result of relatively low relaxation times observed in commercial paints.
“Current work is to then use these material properties to
predict suitability for spray atomization,” he said. “We are using
shadowography methods to collect sprayed droplet particle size
distributions. If the rheology has been correctly described, then
it should directly relate to the quality of spray.”
Sidney Lauren Memorial Lecture
The fourth annual Sidney Lauren Memorial Lecture, “Novel
Biobased Polymers for Coating Applications,” was given by Bret
J. Chisholm of North Dakota State University. His lecture highlighted current and future issues shaping the coatings industry.
As a result of substantial developments in the area of carbo-
cationic polymerization, the polymerization of novel biobased
vinyl ether monomers possessing unsaturated groups in their
side-chains was enabled.
“Linear vinyl ether polymers with narrow molecular weight
distributions were obtained from novel vinyl ether monomers
derived from a variety of renewable resources including plant
oils, eugenol, and cardanol,” said Chisholm. “By appropri-
ate choice of the polymerization system, living polymerization
was achieved and unsaturation derived from the renewable re-
source was preserved in the polymer. By preserving side-chain
unsaturation, crosslinked networks were achieved through an
oxidative mechanism. In addition, the unsaturation was deriva-
tized to other functional groups that enabled the production of
coatings through a variety of crosslinking mechanisms. Further,
it was demonstrated that these biobased vinyl ether monomers
could be readily copolymerized with other monomers to pro-
duce a wide array of functionalized copolymers useful as bind-
ers for coatings.”
Technology Showcase
In addition to the main technical program, the Waterborne
Symposium also included a three-day Technology Showcase.
The Showcase focused on emerging technologies, new materials, innovative services and equipment.
Student Poster Sessions/Awards
This year the Waterborne Symposium presented the Siltech Best
Paper Innovation Award, the SSCT Best Student Paper Award
and the Eastman Student Poster Awards.
USM students presented their research during the Poster
Session. This year’s session included 21 student posters.
The Eastman Student Poster Award Undergraduate
Recipients are Laken Kendrick, “Design of Biomimetic Adhesives
for Improved Wet Adhesion;” Chase Tretbar, “Synthesis of
Hydrazide Functional Polymers by RAFT Polymerization;”
Christopher Keller, “The Effect of Counter-Ion Exchange on
the Morphology and pH Tunability of AB poly(butadiene)-b-poly(lysine) Diblock Copolymers;” and Chase Thompson,
“Analysis of the Formation of the DGEVF/4, 4’-DDS Crosslink
2016 Call for Papers
The School of Polymers and High Performance Materials at The University of Southern Mississippi has issued a call for papers for
presentation at the 43rd Annual International Waterborne Symposium, February 1-5, 2016 in New Orleans. Papers should relate to
new and emerging technologies related to materials, processes, production, characterization, application and markets in the field
of surface coatings. All papers should be original and represent recent advances in coatings science and related disciplines. Title,
abstract and author’s names (speaker’s name underlined) should be submitted by mail, fax or e-mail no later than Aug. 15 to School
of Polymers and High Performance Materials, The University of Southern Mississippi, Box 10063, Hattiesburg, MS 39406-0063; 601-
266-4475; Fax: 601- 266-6265; E-mail: waterborne@usm.edu; Web: www.psrc.usm.edu/waterborne.
Student Poster session.
