Tunable Glue : Rubber Elasticity Control of Adhesion at Polymer/Metal Interface

Sureurg KHONGTONG, Gregory S FERGUSON

Abstract


The adhesion at this interface could be switched on and off just by lowering and raising temperature. A treated surface of 1,4-polybutadiene provides strong adhesion to aluminum at room temperature due to the interaction between hydrophilic functional groups, introduced by surface oxidation, and Al2O3 -native oxide on aluminum surface. This interaction also acts as an enthalpic driving force to stretch chains at the interfacial region of an elastomer to entropically unfavorable condition. Increasing temperature, in turn, induces these stretched interfacial chains to recoil in order to increase entropy of the system, thereby functional groups are pulled away from the elastomer/aluminum interface leading to the weakening of adhesion.

Keywords


Tunable adhesion, Smart surface, Polymer interface, Rubber elasticity

Full Text:

PDF

References


De Crevoisier G Fabre P Corpart J Leibler L. Switchable tackiness and wettability of a liquid crystalline polymer. Science 1999; 285: 1246-9.

Ista L Perez-Luna V Lopez G. Surface-Grafted. Environmentally sensitive polymers for biofilm release. Appl Environ Microbiol 1999; 65: 1603-9.

Khongtong S Ferguson GS. Integration of bulk and interfacial properties in a polymeric system: rubber elasticity at a polybutadiene/water interface. J Am Chem Soc 2001; 123: 3588-94.

Khongtong S Ferguson GS. Integration of bulk and interfacial properties in a polymeric system. 2. rubber elasticity at polyisoprene/water interfaces. Macromol 2002; 35: 4023-9.

Carey DH Ferguson GS. A smart surface: entropic control of composition at a polymer/water interface. J Am Chem Soc 1996; 118: 9780-1.

Rancourt JD Hollenhead JB Taylor LT. Chemistry of the interface between aluminum and polyester films. J Adhes 1993; 40: 267-85.

Ulren L Hjertberg T Ishida H. An FT-IR study on interfacial interactions in ethylene copolymer/aluminum laminates in relation to adhesion properties. J Adhes 1990; 31: 117-36.

Grunzinger SJ Ferguson GS. Coupled, consecutive reconstruction at a polymer/air interface. J Am Chem Soc 2001; 123: 12927-8.

Sperling LH. Introduction to Physical Polymer Science. 2nd ed. John Wiley & Sons, New York, 1992, p. 396-416.

The values of surface roughness (Rrms) measured by an atomic force microscopy (AFM) were ~250Å for the aluminum surfaces and ~60Å for unoxidized- and oxidized-1,4-polybutadiene surfaces used in this study.

Gent AN. Rubber elasticity: basic concepts and behavior. In: Eirich FR (ed). Science and Technology of Rubber. Academic Press, New York, 1978, p. 1-21.

Janarthanan V Garrett PD Stein RS Srinivasarao M. Adhesion enhancement in immiscible polymer bilayer using oriented macroscopic roughness. Polymer 1997; 38: 105-11.

Hojiko P Cifra P Bleha T Chodak I. Fracture toughness of interface of polyethylene modified in bulk. J Appl Polym Sci 1999; 74: 1009-16.


Refbacks

  • There are currently no refbacks.




http://wjst.wu.ac.th/public/site/images/admin/image012_400

Online ISSN: 2228-835X

http://wjst.wu.ac.th

Last updated: 12 August 2019