Direct observation of athermal photofluidisation in azo-polymer films

Soft Matter ◽  
2014 ◽  
Vol 10 (26) ◽  
pp. 4640-4647 ◽  
Author(s):  
Nicolae Hurduc ◽  
Bogdan C. Donose ◽  
Alina Macovei ◽  
Cristina Paius ◽  
Constanta Ibanescu ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Rheological Properties ◽  
Direct Observation ◽  
Polymer Films ◽  
Azo Polymer

Light induced fluidization of azopolysiloxane: exposure to 488 nm light generates instantaneous mass transfer as a result of trans–cis isomerization in azophenol polymers. Viscoelastic mapping confirms the changes of rheological properties upon exposure to the light.

Nature-Inspired Quasicrystal SRG Using Fibonacci Sequences in Photo-Reconfiguration on Azo Polymer Films

2018 ◽  
Vol 26 (11) ◽  
pp. 1042-1047 ◽  
Author(s):  
Kang-Han Kim ◽  
Kuk Young Cho ◽  
Yong-Cheol Jeong
Keyword(s):  
Polymer Films ◽  
Azo Polymer ◽  
Fibonacci Sequences

Stress Effects in Drying Polymer Films

1994 ◽  
Vol 356 ◽  
Author(s):  
S. Y. Tam ◽  
L. E. Scriven ◽  
H. K. Stolarski
Keyword(s):  
Thin Films ◽  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Polymer Films ◽  
Material Properties ◽  
Film Surface ◽  
Viscoplastic Material ◽  
Stress Effects ◽  
Diffusion And Convection ◽  
Extra Stress

AbstractA model is developed to predict the magnitude and pattern of stress due to drying of polymer films. This model combines diffusion-and-convection equation with large deformation elasto-viscoplasticity, utilizing concentration dependent elastic and viscoplastic material properties to better represent the behavior of drying thin films.The results show that the highest stress occurs at film surface where the concentration depletion is the highest. The magnitude of this stress is induced by increasing mass transfer across the film surface but reduced by increasing diffusion coefficient. The edge effect is significant but local, limited to about four film thicknesses. Similarly, change in substrate induces extra stress.

Mechanism of Optically Inscribed High-Efficiency Diffraction Gratings in Azo Polymer Films

1996 ◽  
Vol 100 (21) ◽  
pp. 8836-8842 ◽  
Author(s):  
Christopher J. Barrett ◽  
Almeria L. Natansohn ◽  
Paul L. Rochon
Keyword(s):  
Polymer Films ◽  
High Efficiency ◽  
Diffraction Gratings ◽  
Azo Polymer

Surface-Initiated Mechanism for the Formation of Relief Gratings on Azo-Polymer Films

1998 ◽  
Vol 102 (31) ◽  
pp. 6064-6070 ◽  
Author(s):  
Nirmal K. Viswanathan ◽  
Srinivasan Balasubramanian ◽  
Lian Li ◽  
Jayant Kumar ◽  
Sukant K. Tripathy
Keyword(s):  
Polymer Films ◽  
Azo Polymer

Surface relief gratings on azo polymer films through reversible photoisomerization by the irradiation of a monochromatic light

2006 ◽  
Vol 102 (4) ◽  
pp. 3123-3126 ◽  
Author(s):  
Md. Zahangir Alam ◽  
Tomoko Ohmachi ◽  
Tomonari Ogata ◽  
Takamasa Nonaka ◽  
Seiji Kurihara
Keyword(s):  
Polymer Films ◽  
Surface Relief ◽  
Monochromatic Light ◽  
Azo Polymer ◽  
Surface Relief Gratings
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