Surface Modification of Poly (alkyl/Arylphosphazene) Thin Films

2000 ◽  
Vol 629 ◽  
Author(s):  
John V. St. John ◽  
Patty Wisian-Neilson
Keyword(s):  
Thin Films ◽  
Surface Modification ◽  
Chemical Resistance ◽  
Chemical Properties ◽  
Inorganic Polymers ◽  
Thin Polymer Films ◽  
Hydrophilic Interactions ◽  
Carboxylic Acid Groups ◽  
Polymer Interface ◽  
Thin Polymer

ABSTRACTPoly (methylphenylphosphazene) (PMPP) is an example of a unique class of inorganic polymers with alternating – (P=N)– backbones. Chemical modification of bulk PMPP can result in changes of physical properties such as chemical resistance, onset temperature of thermal degradation, elasticity, and flexibility. Surface modification of PMPP allows tailoring of the chemical properties at the polymer interface while maintaining the integrity of the bulk polymer. In this research, PMPP thin films were treated to form carboxylate or carboxylic acid groups at the surface. Surface modification was monitored by following changes in contact angle. The hydrophobic/hydrophilic interactions of carboxylated PMPP surfaces allow for mesoscale interactions of thin polymer films.

Rubber-Assisted Hot Embossing for Structuring Thin Polymer Film Polymeric Films

2006 ◽  
Author(s):  
Pratapkumar Nagarajan ◽  
Donggang Yao
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Polymer Film ◽  
Hot Embossing ◽  
Polymeric Films ◽  
Thin Polymer Film ◽  
Thin Polymer Films ◽  
Process Variables ◽  
Hard Materials ◽  
Thin Polymer

Precision structured polymer thin films with microstructures comparable to or greater than the film thickness are highly desired in many applications. Such micro-patterned thin films, however, are difficult to fabricate using the standard hot embossing technology where both halves of the mold are made of hard materials. This study investigated a rubber-assisted embossing process for structuring thin polymer films. The advantages of the rubber backup instead of a hard support include but are not limited to 1) simplifying the embossing tool, 2) protecting the embossing master, 3) facilitating embossing pressure buildup, and 4) accommodating conformal forming of microscale shell patterns. Several design and process variables including rubber hardness, embossing temperature, embossing pressure and holding time were carefully studied. Thin polystyrene films in a thickness of 25 μm were accurately patterned with microgrooves of characteristic dimensions on the order of 100 μm.

scholarly journals Physical properties of thin films on implant-materials

2010 ◽  
pp. 121-126 ◽  
Author(s):  
Vladan Mirjanic ◽  
Radmila Arbutina ◽  
Jovan Setrajcic ◽  
Ljubisa Dzambas
Keyword(s):  
Thin Films ◽  
Physical Properties ◽  
Polymer Films ◽  
Thin Polymer Films ◽  
Preliminary Results ◽  
Implant Materials ◽  
Thin Polymer

In this paper, we present the analysis of thin films in implant materials. Based on preliminary results, it can be concluded that thin polymer films between bone and implant achieve biocompatibility. In addition, analysis will be conducted for other characteristics, such as bioinertia, and biofunctionality.

Grazing-incidence small-angle X-ray scattering from thin polymer films with lamellar structures – the scattering cross section in the distorted-wave Born approximation

2006 ◽  
Vol 39 (3) ◽  
pp. 433-442 ◽  
Author(s):  
P. Busch ◽  
M. Rauscher ◽  
D.-M. Smilgies ◽  
D. Posselt ◽  
C. M. Papadakis
Keyword(s):  
Thin Films ◽  
Polymer Films ◽  
Small Angle ◽  
Born Approximation ◽  
Grazing Incidence ◽  
Thin Polymer Films ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
X Ray ◽  
Thin Polymer

Grazing-incidence small-angle X-ray or neutron scattering of thin polymer films reveals information about the ordering and preferential orientations of the phase-separated microdomains within the films. The grazing-incidence geometry enhances the surface sensitivity; however, the scattering has to be treated within the framework of the distorted-wave Born approximation. In this work, the case of thin films with lamellar mesostructure is studied, where the orientation of the lamellae is either perpendicular or parallel to the film interfaces. For perpendicular lamellae, Bragg rods are found, which are extended along the film normal, whereas for parallel lamellae, peaks along the film normal appear. The positions of the maxima present in the latter case are explained by accounting for refraction at the film surface and reflection at the film–substrate interface. The results are relevant for thin films of lamellar diblock copolymers.

Room Temperature Dewetting of Polymer Thin Films Investigated by AFM and Low Voltage SEM

2000 ◽  
Vol 6 (S2) ◽  
pp. 710-711
Author(s):  
D.N. Leonard ◽  
A.D. Batchelor ◽  
R.J. Spontak ◽  
P.E. Russell
Keyword(s):  
Thin Films ◽  
Biomedical Applications ◽  
Diblock Copolymers ◽  
Low Voltage ◽  
Nucleation Site ◽  
Thin Polymer Films ◽  
Dewetting Process ◽  
Thin Polymer ◽  
Dry Patch ◽  
Free Films

Thin films (<100nm) of diblock copolymers are being investigated for various applications including templates for nanopatterning [1], electronic packaging materials, and biomedical applications. In such applications it is essential that stable defect free films be produced repeatedly. Because long and short range forces (like van der Waals) dominate thin polymer films, instabilities are introduced in the films when they are spin-coated onto hydrophobic substrates resulting in dewetting of the film from the substrate. Dewetting is initiated at a nucleation site in a metastable film leading to the formation of a dry patch and proceeds to grow by transport of material away from the nucleation site, forming a lip that surrounds the hole. Highly symmetrical structures form during progression of the dewetting process and completion of the process can be identified when all holes coalesce forming polygons outlined by droplets of the polymer film [2].

INFLUENCE OF SURFACE MODIFICATION ON PHYSICOCHEMICAL PROPERTIES OF ZnO THIN FILMS AND NANOSTRUCTURES: A REVIEW

2018 ◽  
Vol 25 (01) ◽  
pp. 1830002 ◽  
Author(s):  
FENGLIN XIAN ◽  
LINHUA XU
Keyword(s):  
Thin Films ◽  
Surface Modification ◽  
Review Paper ◽  
Chemical Properties ◽  
Zno Thin Films ◽  
Inorganic Species ◽  
Modification Method ◽  
Sensor Property ◽  
Physical And Chemical ◽  
And Chemical Properties

The surface modification plays an important role on both physical and chemical properties of zinc oxide (ZnO) materials. In this review paper, efforts are made to summarize and analyze reported results regarding surface modification method, surface modification effect on the luminescence and superhydrophobic properties of ZnO thin films and nanostructures. Furthermore, the photocatalytic activity and gas sensor property of modified ZnO using both organic and inorganic species are also involved.

scholarly journals Thermoplasmonic dissipation in gold nanoparticle–polyvinylpyrrolidone thin films

RSC Advances ◽  
2017 ◽  
Vol 7 (89) ◽  
pp. 56463-56470 ◽  
Author(s):  
Tyler V. Howard ◽  
Jeremy R. Dunklin ◽  
Gregory T. Forcherio ◽  
D. Keith Roper
Keyword(s):  
Thin Films ◽  
Gold Nanoparticle ◽  
Polymer Films ◽  
A Priori ◽  
Thin Polymer Films ◽  
Thin Polymer

Dissipated heat was consistent with power extinguished by absorbing nanoparticles dispersed into thin polymer films at subwavelength intervals. Measurements mirrored a priori simulation of optical and thermal responses. Components of heating and absorption were identified.

Is the chain dynamics in thin polymer films isotropic ?

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-233-Pr7-237 ◽  
Author(s):  
S. Rivillon ◽  
P. Auroy ◽  
B. Deloche
Keyword(s):  
Polymer Films ◽  
Thin Polymer Films ◽  
Chain Dynamics ◽  
Thin Polymer
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