Results 61 to 70 of about 83,136 (303)

Enhancement of glass transition temperature for poly(methyl methacrylate) by salt [PDF]

, 2018
We investigated the effects of two metal salts, lithium trifluoromethanesulfonate (LiCF_3SO_3) and lithium bromide (LiBr), on the glass transition temperature (Tg) of poly(methyl methacrylate) (PMMA).
Phulkerd, Panitha, Mizuki Soga, Antoine Courtoux, Soga, Mizuki, Asae Ito, Azusa Miyagawa, Miyagawa, Azusa, Panitha Phulkerd, Ayerdurai, Viknasvarri, Masayuki Yamaguchi, Viknasvarri Ayerdurai, Ito, Asae, Courtoux, Antoine, Yamaguchi, Masayuki   +13 more
core   +1 more source

Sulfur‐Free Ultrahigh‐Refractive‐Index Polymers Enabled by Densely Packed Oxygen‐Bridged Dibenzofuran‐Cardo Architectures

Advanced Functional Materials, EarlyView.
A new class of sulfur‐free, oxygen‐bridged dibenzofuran‐based polymers is developed for ultrahigh‐refractive‐index applications. The rigid π‐extended architecture and enhanced molecular polarizability enable exceptional optical performance, combining refractive indices up to 1.848 with high Abbe numbers and full visible transparency. This work offers a
Hend A. Hegazy, Gyeongsoo Kim, Sooyoung Lee, Mohamed R. Elmasry, Youn‐Chul Kim, Changsik Song   +5 more
wiley   +1 more source

Frontal Bone Cranioplasty Using Customized Implants Through A 3d Prototype: Case Report

Revista Naval de Odontologia On Line, 2023
Cranioplasty for the treatment of cranial bone defects has as its main objective the three-dimensional and functional reconstruction of the skull. Computer-assisted surgeries (CAS) have been used since the 1990s efficiently and bring improvements and ...
Erick Estrela Maia, Bruno Turéli, Guilherme Pivatto Louzada   +2 more
doaj   +1 more source

A comparative study on PMMA-TiO2 and PMMA-ZrO2 protective coatings

Progress in Organic Coatings, 2020
Abstract The covalent conjugation between the phases of organic-inorganic nanocomposites and the careful tuning of the proportion of the colloidal precursors are essential to yield homogeneous, cross-linked and dense coatings that are able to protect metallic alloys against corrosion.
Harb, Samarah V., Trentin, Andressa, Uvida, Mayara C., Magnani, Marina, Pulcinelli, Sandra H., Santilli, Celso V., Hammer, Peter   +6 more
openaire   +3 more sources

Volume Relaxation Rate in a-PMMA and a-PMMA/PEO Amorphous Blends [PDF]

Polymer Journal, 2004
Volume relaxation in a-PMMA and a-PMMA/PEO amorphous blends was investigated by employing a mercury-in-glass dilatometer after a temperature down-jump from equilibrium above glass transition temperature, Tg, to an aging temperature below Tg. From volume contraction isotherms, volume relaxation rate, βv = −1/V(dV / dlogt), was determined as a parameter ...
Slobodian, Petr, Lengálová, Anezka, Sáha, Petr   +2 more
openaire   +1 more source

Desenvolvimento de polímeros híbridos orgânico-inorgânicos para aplicação como revestimentos protetores [PDF]

, 2014
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Química, Florianópolis, 2014.O PMMA é um polímero orgânico muito utilizado na formulação de revestimentos e adesivos devido à boa ...
Coan, Thais
core  

An Electrowetting Pump

Advanced Functional Materials, EarlyView.
A tubular electrowetting pump moves alternating droplets through a millimeter‐wide channel in discrete, reversible steps, functioning as a fluidic stepper motor. With no moving parts and electrodes insulated from the liquid, it delivers silent, accurate flow. Flexibility allows the pump to be woven directly into textiles for wearable, medical, and soft‐
Robert Hennig, Herbert Shea
wiley   +1 more source

Investigation of Hardness and Flexural Properties of PMMA Nano Composites and PMMA Hybrids Nano Composites Reinforced by Different Nano Particles Materials used in Dental Applications [PDF]

Engineering and Technology Journal, 2016
Poly methyl methacrylate (PMMA), widely used as a prosthodontic denture base, the denture base materials should exhibit good mechanical properties and dimensional stability in moist environment.
Sihama E. Salih, Jawad K. Oleiwi, Alaa Mohammed.T   +2 more
doaj   +1 more source

Intrinsic Dual-Phase Regulated GeSe₂ Nanoparticles Triggered by Ball-Milling Treatment for Photonic Multi-Valued Logic Circuits. [PDF]

Adv Sci (Weinh)
We report the solid‐state ball milling, a traditional, reliable, mass‐productive material processing, to prepare the air‐stable and dual‐phase GeSe2‐x nanoparticles with extended photodetection feasibility toward optical‐wavelength regions. We further display photonic multi‐valued logic (MVL) circuit through the employment of a hybrid PMMA/GeSe2‐x ...
Tsai AT, Wang CJ, Liao PC, Lue CS, Kuo CN, Thuan LVP, Hsiao PH, Kim CH, Chen CY.   +8 more
europepmc   +2 more sources

Multi‐Level Saturation Current Encoding in Two‐Dimensional Ferroelectric Source‐Gated Transistors

Advanced Functional Materials, EarlyView.
A 2D ferroelectric source‐gated transistor (SGT) operates with a non‐volatile, multi‐level saturation current controlled by ferroelectric polarization. Operando electrostatic and photocurrent imaging link the current limitation to source‐side depletion, identifying saturation current as a programmable, read‐bias‐tolerant device parameter toward low ...
Joon‐Seok Kim, Ting‐Ching Chu, Zhehao Zhu, Lincoln J. Lauhon   +3 more
wiley   +1 more source