Results 41 to 50 of about 22,448 (261)

Shape memory polyurethane foams

eXPRESS Polymer Letters, 2012
Molded flexible polyurethane (PU) foams have been synthesized from polypropylene glycol (PPG) with different molecular weights (Mw) and functionalities (f), and 2,4/2,6-toluene diisocyanate (TDI-80) with water as blowing agent.
B. K. Kim, S. M. Kang, S. J. Lee
doaj   +1 more source

A study of optical, mechanical and electrical properties of poly(methacrylic acid)/TiO2 nanocomposite

Results in Physics, 2018
This work is concerned with the study of the effect of titanium dioxide (TiO2) nanofillers on the optical, mechanical and electrical properties of poly(methacrylic acid) (PMAA) networks as a function of TiO2 concentration and crosslink density.
Ateyyah M. AL-Baradi, Samar F. Al-Shehri, Ali Badawi, Amar Merazga, A.A. Atta   +4 more
doaj   +1 more source

The influence of Dunlop and air microbubbling manufacturing methods on the physical, microstructural and mechanical properties of nano-alumina filled natural rubber latex foam

eXPRESS Polymer Letters, 2022
The impacts of nano-alumina (NA) as a filler and the manufacturing methods of Dunlop and air microbubbling on the physical, microstructural and mechanical properties of natural rubber latex foam (NRLF) were comprehensively investigated.
Amin Raveshtian, Mohammad Fasihi, Reza Norouzbeigi, Sajad Rasouli   +3 more
doaj   +1 more source

Determinación de la densidad de entrecruzamiento de poliuretanos obtenidos a partir de aceite de ricino modificado por transesterificación Determination of crosslink density of polyurethanes obtained from castor oil modified by transesterification

Polímeros, 2009
Se obtuvo una gama de polioles a partir del aceite de ricino modificado por transesterificación con pentaeritriol y glicerina. Los productos resultantes fueron caracterizados físico-químicamente. Se sintetizaron elastómeros de poliuretano a partir de los
Manuel F. Valero, Jorge E. Pulido, Álvaro Ramírez, Zhengdong Cheng   +3 more
doaj   +1 more source

Gradient porous structures of mycelium: a quantitative structure–mechanical property analysis

Scientific Reports, 2023
Gradient porous structures (GPS) are characterized by structural variations along a specific direction, leading to enhanced mechanical and functional properties compared to homogeneous structures.
Eric Olivero, Elzbieta Gawronska, Praveena Manimuda, Devyani Jivani, Faemia Zullfikar Chaggan, Zachary Corey, Thaicia Stona de Almeida, Jessica Kaplan-Bie, Gavin McIntyre, Olga Wodo, Prathima C. Nalam   +10 more
doaj   +1 more source

Effect of Gamma Irradiation on Crosslink Density and Chemical Characteristics of Gadolinium Oxide-Natural Rubber Vulcanizate Composite

Urania
Natural rubber is a polymer that has been widely used in various industrial applications because of its high flexibility. In this study, vulcanizates were developed from SiO2-reinforced natural rubber with added Gd₂O₃. Vulcanizate composites containing 0,
Dira Amanda, Tetty Kemala, Jaka Rachmadetin, Sulistioso Giat Sukaryo, Adi Cifriadi, Mohammad Khotib, Kuat Heriyanto, Achmad Ramadhani   +7 more
doaj   +1 more source

Bromide and Chloride Ionic Liquids Applied to Enhance the Vulcanization and Performance of Natural Rubber Biocomposites Filled with Nanosized Silica

Nanomaterials, 2022
In this study, the possibility of using ionic liquids (ILs) as auxiliary substances improving the vulcanization and physicochemical properties of natural rubber (NR) biocomposites filled with nanosized silica was investigated. Hence, the influence of ILs
Magdalena Maciejewska, Anna Sowińska-Baranowska   +1 more
doaj   +1 more source

Decoding the dynamic extracellular matrix in cancer—3D models and bioscaffolds rewire the rules of tumor progression

FEBS Letters, EarlyView.
Cancer progression is regulated by the dynamic matrix code of the tumor microenvironment, which influences cellular behavior and disease development. Importantly, matrix remodeling in three‐dimensional cancer models more accurately reflects in vivo conditions compared to conventional two‐dimensional systems.
Sylvia Mangani, Konstantinos Spanopoulos, Zoi Piperigkou, Nikos K. Karamanos   +3 more
wiley   +1 more source

Translating whole‐genome doubling into precision medicine in cancer

Molecular Oncology, EarlyView.
Whole‐genome doubling creates a WGD‐positive tumor state characterized by persistent chromosomal instability, karyotypic diversification, and cellular stress. These same biological pressures drive aggressive tumor evolution while exposing therapeutic vulnerabilities, providing a rationale for WGD‐informed precision medicine. Whole‐genome doubling (WGD)
Sejung Lee, Junghyeok Lim, Jinhyuk Bhin
wiley   +1 more source

Epoxidized natural rubber and hydrotalcite compounds: rheological and thermal characterization

Polímeros, 2017
Epoxidized natural rubber (ENR) and synthetic non-modified hydrotalcite (HT) compounds were prepared and evaluated. Natural rubber (NR) was epoxidized with 20.6% of epoxy groups from a chemical modification of the latex.
Vanessa Macedo da Silva, Regina Célia Reis Nunes, Ana Maria Furtado de Sousa   +2 more
doaj   +1 more source