Results 11 to 20 of about 7,432 (275)

A novel BCS code in F-OFDM system: a promising candidate for 5G wireless communication systems [PDF]

open access: yes, 2021
Due to the rapid growth in wireless communication systems, Long Term Evolution (LTE), mainly based on Orthogonal Frequency Division Multiplexing (OFDM), no longer meets wireless communication systems request and higher data rate requirements. Thus,
Hussain, Ghasan Ali
core  

Gaseous- and Condensed-Phase Activities of Some Reactive P- and N-Containing Fire Retardants in Polystyrenes

open access: yesMolecules, 2022
Polystyrene (PS) was modified by covalently binding P-, P-N- and/or N- containing fire-retardant moieties through co- or ter-polymerization reactions of styrene with diethyl(acryloyloxymethyl)phosphonate (DEAMP), diethyl-p-vinylbenzyl phosphonate (DEpVBP)
Svetlana Tretsiakova-McNally   +7 more
doaj   +1 more source

Conformational behaviour of poly(2,6-dimethyl-1,4-phenylene oxide) in solution - II. Sedimentation coefficients and permeabilities in the semi-dilute region as a function of temperature [PDF]

open access: yes, 1982
Sedimentation and flotation coefficients of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) solutions have been measured as a function of temperature between 60 and 25°. The solvents were toluene and trichloroethane (TCE).
Berg, J.W.A. van den   +2 more
core   +4 more sources

Fabrication of fire-retardant building materials via a hyper-crosslinking chemical conversion process from waste polystyrenes

open access: yesEnergy and Built Environment, 2022
Polystyrene (PS) is rich in plastic materials, but it produces a large amount of waste every year, causing a huge burden on the environment. Although PS plastic is the source of a common ''white pollution'' in daily life, it still has a high utilization ...
Changhui Liu   +4 more
doaj   +1 more source

The Oxidative Coupling of 2,6-Xylenol Catalyzed by Polymeric Complexes of Copper, 2. Physicochemical Study on Copper(II) Complexes of Partially Dimethylaminomethylated Polystyrene [PDF]

open access: yes, 1977
The polymeric catalyst formed by complexation of copper(II) chloride and partially dimethylaminomethylated polystyrene was investigated to explain its behaviour in the oxidative coupling of 2,6-xylenol.
Borkent, Jan,   +3 more
core   +2 more sources

Study on the Synthesis and Characterization of Antibacterial Polystyrenes

open access: yesJournal of the Turkish Chemical Society, Section A: Chemistry, 2019
In the present work, a series of quaternized antibacterial polystyrenes (Anti-PSts) with various molecular weights are synthesized and characterized. Initially, ω-bromo end functional polystyrenes with different molecular weights (PSt-Br-1, PSt-Br-2 and ...
Gökhan Açık
doaj   +1 more source

Advances in Organic and Organic-Inorganic Hybrid Polymeric Supports for Catalytic Applications

open access: yesMolecules, 2016
In this review, the most recent advances (2014–2016) on the synthesis of new polymer-supported catalysts are reported, focusing the attention on the synthetic strategies developed for their preparation.
Anna Maria Pia Salvo   +2 more
doaj   +1 more source

Microporous Hyper-Crosslinked Polystyrenes and Nanocomposites with High Adsorption Properties: A Review [PDF]

open access: yes, 2017
Hyper-crosslinked (HCL) polystyrenes show outstanding properties, such as high specific surface area and adsorption capability. Several researches have been recently focused on tailoring their performance for specific applications, such as gas ...
Ambrogi, Veronica   +4 more
core   +2 more sources

Synthesis and properties of a new AB-cross-linked copolymer membrane system [PDF]

open access: yes, 1993
The alcohol permeability and permselectivity properties as well as the morphology of membranes made of a newly developed AB-cross-linked copolymer system composed of elastomeric and glassy components were investigated.
Kerres, J.A., Strathmann, H.
core   +2 more sources

Direct Observation of Confinement Effects of Semiconducting Polymers in Polymer Blend Electronic Systems

open access: yesAdvanced Science, 2021
The advent of special types of polymeric semiconductors, known as “polymer blends,” presents new opportunities for the development of next‐generation electronics based on these semiconductors' versatile functionalities in device applications.
Byoungwook Park   +14 more
doaj   +1 more source

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