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Search Publications by: Edwin P Chan (Fed)

Displaying 51 - 59 of 59

Thickness effect on the viscoelastic properties of polystyrene thin films as measured by thermal wrinkling

December 29, 2010

Author(s)

Edwin P. Chan, Santanu S. Kundu, Qinhuang Lin, Christopher M. Stafford

The viscoelastic properties of polymer thin films can have a significant impact on the performance in many small-scale devices. In this work, we use thermal wrinkling, which is a phenomenon based on a thermally-initiated instability, to measure

Correlations Between Mechanical and Electrical Properties of Polythiophenes

August 2, 2010

Author(s)

Brendan T. O'Connor, Dean M. DeLongchamp, Regis J. Kline, Edwin P. Chan

Measuring the viscoelastic properties of confined polymer films by thermal wrinkling

March 21, 2010

Author(s)

Edwin Chan, Kirt A. Page, Christopher Stafford

We demonstrate that thermal wrinkling can be utilized to measure the rubbery modulus and shear viscosity of polystyrene (PS) thin films as a function of temperature. Specifically, we use surface laser-light scattering (SLS) to characterize the wrinkled

Cantilever Peel Measurements on Patterned Surfaces: Characterizing the Effect of Pattern Geometry and Void Space.

February 21, 2010

Author(s)

John A. Howarter, Edwin Chan, Christopher Stafford

Microstructural and hierarchical patterns are able to enhance the fracture toughness of adhesive interfaces. This phenomenon has been observed naturally in the design of foot pads of insects and other small animals such as the gecko. By understanding the

Effect of chain architecture on the viscoelastic properties of polymer films measured via thermal wrinkling

February 21, 2010

Author(s)

Edwin Chan, Qinghuang Lin, Christopher Stafford

Although existing techniques can measure the viscoelastic properties of bulk polymers, few are available for measuring these properties in polymer thin films. This information has become increasingly important as polymers thin films are developed in a

Harnessing surface wrinkling to measure the viscoelastic properties of polymer films and coatings.

February 10, 2010

Author(s)

Edwin P. Chan, Kirt A. Page, Christopher M. Stafford

Viscoelastic Properties of Confined Polymer Films Measured via Thermal Wrinkling

October 8, 2009

Author(s)

Kirt A. Page, Edwin Chan, Se Hyuk Im, Derek L. Patton, Rui Huang, Christopher Stafford

We present a new measurement technique to quantify the viscoelastic properties of polymer thin films. This approach utilizes thermally-induced surface wrinkling to measure the rubbery modulus and shear viscosity of polymer thin films. Specifically, by

Adhesion and Mechanics of Complex Polymer Interfaces

August 16, 2009

Author(s)

Christopher M. Stafford, Jun Y. Chung, Heqing Huang, Adam J. Nolte, Peter M. Johnson, Edwin P. Chan

The structure and properties of polymer interfaces play an integral role in numerous technological applications, particularly in the areas of coatings and adhesives. These interfacial interactions are dependent on a host of factors, including interfacial

Subsurface Patterning and its Effect on Interfacial Adhesion

February 15, 2009

Author(s)

Edwin P. Chan, Christopher M. Stafford

Nature (e.g. geckos and insects) has illustrated that a patterned surface can effectively tailor the adhesion of an interface. Inspired by the amazing attachment and detachment ability of these animals, significant efforts have been put forth to understand