Glass transition behaviour of thin polymer films coated on the 3D networks of porous CNT sponges

2020 ◽  
Vol 22 (37) ◽  
pp. 21297-21306
Author(s):  
Min Wang ◽  
Jiapeng Zhang ◽  
Shenglin Zhou ◽  
Zhaohui Yang ◽  
Xiaohua Zhang
Keyword(s):  
Glass Transition ◽  
Free Surface ◽  
Polymer Films ◽  
Polymer Chains ◽  
Polymer Substrate ◽  
Thin Polymer Films ◽  
Substrate Interface ◽  
Thin Polymer ◽  
Transition Behaviour ◽  
3D Networks

The influence of the coexistence of a free surface and a polymer–substrate interface on the glass transition behaviour of polymer chains on CNT sidewalls.

Novel Technique for Measuring Through-Plane Thermo-Mechanical Properties of Thin Polymer Films

1998 ◽  
Vol 511 ◽  
Author(s):  
K. S. Patel ◽  
Sue Ann bidstrup-Allen ◽  
P. A. Kohl ◽  
T. C. HODGE
Keyword(s):  
Polymer Films ◽  
Mechanical Design ◽  
Coefficient Of Thermal Expansion ◽  
Compression Modulus ◽  
Polymer Chains ◽  
Thin Polymer Films ◽  
Electrode Structure ◽  
Thin Polymer ◽  
Characterization Of Properties ◽  
A New Technique

ABSTRACTPolymer thin films (less than 20 ltm) are widely used as coatings and inter-level dielectrics in microelectronic applications. In multi-layer structures, stresses generated in the films due to interaction with adjacent layers and solvent evaporation induced shrinkage, cause the polymer chains to orient in the plane of the film resulting in anisotropic film properties. Characterization of properties in all directions is essential for accurate electrical and mechanical design and modeling.A new technique has been developed to measure, in-situ, the through-plane (z) properties of thin polymer films. A parallel plate capacitor device and an interdigitated electrode structure were used as sensors to detect changes in dielectric constant and thickness of thin polymer films under thermal or mechanical loading. The through-plane compression modulus and coefficient of thermal expansion were calculated and results are reported for benzocyclobutene (BCB) films.

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