The Mechanism of Adhesion Improvement of Elastomeric Silicone Sealants to Difficult-to-Bond Polymeric Substrates through Reactive or Interpenetrating Molecular Brushes

2012 ◽  
pp. 243-265
Author(s):  
W. (Voytek) S. Gutowski ◽  
Gary Toikka ◽  
Sheng Li
Keyword(s):  
Molecular Brushes ◽  
Polymeric Substrates

Benzylamine Tartrate as an Organic Glass Substrate for Carbon Films by Evaporation

1970 ◽  
Vol 28 ◽  
pp. 484-485
Author(s):  
A. C. Faberge
Keyword(s):  
Vapor Pressure ◽  
Viscous Liquid ◽  
Glass Substrate ◽  
Room Temperature ◽  
Carbon Film ◽  
Carbon Films ◽  
Organic Glass ◽  
Spectroscopic Examination ◽  
Polymeric Substrates

Benzylamine tartrate (m.p. 63°C) seems to be a better and more convenient substrate for making carbon films than any of those previously proposed. Using it in the manner described, it is easy consistently to make batches of specimen grids as open as 200 mesh with no broken squares, and without individual handling of the grids. Benzylamine tartrate (hereafter called B.T.) is a viscous liquid when molten, which sets to a glass. Unlike polymeric substrates it does not swell before dissolving; such swelling of the substrate seems to be a principal cause of breakage of carbon film. Mass spectroscopic examination indicates a vapor pressure less than 10−9 Torr at room temperature.

scholarly journals Insights into Biodegradable Polymer-Supported Titanium Dioxide Photocatalysts for Environmental Remediation

Macromol ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 201-233
Author(s):  
Nina Maria Ainali ◽  
Dimitrios Kalaronis ◽  
Eleni Evgenidou ◽  
Dimitrios N. Bikiaris ◽  
Dimitra A. Lambropoulou
Keyword(s):  
Titanium Dioxide ◽  
Biodegradable Polymers ◽  
Biodegradable Polymer ◽  
Environmental Remediation ◽  
Mechanical Stability ◽  
Dip Coating ◽  
Tio2 Photocatalysts ◽  
Chemical Inertness ◽  
Polymeric Substrates ◽  
Published Research

During the past two decades, immobilization of titanium dioxide (TiO2), a well-known photocatalyst, on several polymeric substrates has extensively gained ground since it limits the need of post-treatment separation stages. Taking into account the numerous substrates tested for supporting TiO2 photocatalysts, the use of biodegradable polymer seems a hopeful option owing to its considerable merits, including the flexible nature, low price, chemical inertness, mechanical stability and wide feasibility. The present review places its emphasis on recently published research articles (2011–2021) and exhibits the most innovative studies facilitating the eco-friendly biodegradable polymers to fabricate polymer-based photocatalysts, while the preparation details, photocatalytic performance and reuse of the TiO2/polymer photocatalysts is also debated. The biodegradable polymers examined herein comprise of chitosan (CS), cellulose, alginate, starch, poly(lactid acid) (PLA), polycaprolactone (PCL) and poly(lactide-co-glycolide) (PLGA), while an emphasis on the synthetical pathway (dip-coating, electrospinning, etc.) of the photocatalysts is provided.

scholarly journals Optimization of the conductivity of microwave components printed by inkjet and aerosol jet on polymeric substrates by IPL and laser sintering

2021 ◽  
pp. 1-11
Author(s):  
Chaimaa El Hajjaji ◽  
Nicolas Delhote ◽  
Serge Verdeyme ◽  
Malgorzata Piechowiak ◽  
Laurence Boyer ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Quality Factor ◽  
Silver Nanoparticle ◽  
Laser Sintering ◽  
Hot Plate ◽  
Sintering Time ◽  
Trade Offs ◽  
Nanoparticle Inks ◽  
Polymeric Substrates ◽  
Aerosol Jet Printing

Abstract In this work, microwave planar resonators are printed with silver nanoparticle inks using two printing technologies, inkjet printing and aerosol jet printing, on polyimide substrates. The microwave resonators used in this paper operate in the frequency band 5–21 GHz. The printing parameters, such as the number of printed layers of silver nanoparticle inks, drop spacing, and sintering time, were optimized to ensure repeatable and conductive test patterns. To improve the electrical conductivity of silver deposits, which are first dried using a hot plate or an oven, two complementary sintering methods are used: intense pulsed light (IPL) and laser sintering. This paper presents the results of different strategies for increasing the final quality factor of printed planar resonators and the trade-offs (sintering time versus final conductivity/unloaded Q) that can be reached. Improvement of the resonator unloaded quality factor (up to +55%) and of the equivalent electrical conductivity (up to 14.94 S/μm) at 14 GHz have been obtained thanks to these nonconventional sintering techniques. The total sintering durations of different combinations of sintering techniques (hot plate, oven, IPL, and laser) range from 960 to 90 min with a final conductivity from 14.94 to 7.1 S/μm at 14 GHz, respectively.

scholarly journals Integrated Polypyrrole Flexible Conductors for Biochips and MEMS Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Rakefet Ofek Almog ◽  
Hadar Ben-Yoav ◽  
Yelena Sverdlov ◽  
Tsvi Shmilovich ◽  
Slava Krylov ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Aspect Ratio ◽  
Seed Layer ◽  
Conductive Polymer ◽  
Sensors And Actuators ◽  
Flexible Sensors ◽  
Planar Structures ◽  
Polymeric Substrates ◽  
Seed Layers ◽  
Structural Polymers

Integrated polypyrrole, a conductive polymer, interconnects on polymeric substrates were microfabricated for flexible sensors and actuators applications. It allows manufacturing of moving polymeric microcomponents suitable, for example, for micro-optical-electromechanical (MOEMS) systems or implanted sensors. This generic technology allows producing “all polymer” components where the polymers serve as both the structural and the actuating materials. In this paper we present two possible novel architectures that integrate polypyrrole conductors with other structural polymers: (a) polypyrrole embedded into flexible polydimethylsiloxane (PDMS) matrix forming high aspect ratio electrodes and (b) polypyrrole deposited on planar structures. Self-aligned polypyrrole electropolymerization was developed and demonstrated for conducting polymer lines on either gold or copper seed layers. The electropolymerization process, using cyclic voltammetry from an electrolyte containing the monomer, is described, as well as the devices’ characteristics. Finally, we discuss the effect of integrating conducting polymers with metal seed layer, thus enhancing the device durability and reliability.

Synthesis and Morphology of Molecular Brushes with Polyacrylonitrile Block Copolymer Side Chains and Their Conversion into Nanostructured Carbons

2007 ◽  
Vol 40 (17) ◽  
pp. 6199-6205 ◽  
Author(s):  
Chuanbing Tang ◽  
Bruno Dufour ◽  
Tomasz Kowalewski ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Block Copolymer ◽  
Side Chains ◽  
Molecular Brushes ◽  
Nanostructured Carbons
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