Results 1 to 10 of about 2,711,644 (353)

A Comparative Study of Biomimetic Synthesis of EDOT-Pyrrole and EDOT-Aniline Copolymers by Peroxidase-like Catalysts: Towards Tunable Semiconductive Organic Materials

open access: yesFrontiers in Chemistry, 2022
It has been two decades since biomimetic synthesis of conducting polymers were first reported, however, the systematic investigation of how catalysts influence the properties of the conducting polymers has not been reported yet.
Manuel Eduardo Martínez-Cartagena   +7 more
doaj   +1 more source

A practical criterion for synthesizing ethylen-1-butene copolymer in powder form in slurry polymerization with a Ziegler-Natta catalyst and predicting its incorporated 1-butene [PDF]

open access: yesPolyolefins Journal, 2023
The concentration of ethylene and 1-butene in n-hexane as polymerization media was calculated at five different pressure levels (4, 6, 8, 10, and 12 bar) and four different 1-butene concentrations (0.13, 0.26, 0.39, and 0.52 mol/L) in n-hexane at T= 80°C
Mohsen Javaheri   +2 more
doaj   +1 more source

Polymeric Foams [PDF]

open access: yesPolymers, 2019
Advances in nanotechnology have boosted the development of more efficient materials, with emerging sectors (electronics, energy, aerospace, among others) demanding novel materials to fulfill the complex technical requirements of their products [...]
Antunes, Marcelo de Sousa Pais   +1 more
openaire   +5 more sources

The relationship among changes in microstructure, active sites behavior and properties in the propylene polymerization with a 4th generation Ziegler-Natta catalyst [PDF]

open access: yesPolyolefins Journal, 2019
Three polypropylene samples (1-3) were synthesized with a 4th generation Ziegler-Natta catalyst in the presence of cyclohexyldimethoxymethylsilane (donor c), dicyclopenthyldimethoxysilane (donor d) and diisopropyldimethoxysilane (donor p), respectively ...
Shokoufeh Hakim   +2 more
doaj   +1 more source

Cured Poly(ethylene-g-maleic anhydride)/Graphene Nanocomposite: Properties and Characterization [PDF]

open access: yesMechanics of Advanced Composite Structures, 2018
Poly(ethylene-g-maleic anhydride) (PEMA)/graphene nanoplatelets (xGn) (PEMA-xGn) composites were prepared by melt dispersion in an internal shear mixer.
Behrouz Jafari   +2 more
doaj   +1 more source

Polymeric Membranes [PDF]

open access: yesMembranes, 2021
This Special Issue of Polymeric Membranes is dedicated to gathering research carried out within the field of polymeric membranes in different fields of application [...]
openaire   +3 more sources

Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization [PDF]

open access: yesPolyolefins Journal, 2017
The aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization.
Farshid Nouri-Ahangarani   +3 more
doaj   +1 more source

Synthesis and Characterization of ω-Halogenated Poly(dimethyl siloxane) [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2014
Poly(dimethyl siloxane) (PDMS) has received special attention due to its unique properties such as high surface tension, high gas permeability, high hydrophobicity, high chain flexibility at room temperature, good biocompatibility and very low glass ...
Mojtaba Farrokhi, Mahdi Abdollahi
doaj   +1 more source

Preparation, Characterization and Permeation Behavior of Poly(methyl acrylate)-Poly(dimethyl siloxane)-Poly(methyl acrylate) Block Copolymer/Poly(vinyl acetate) Blend Membranes [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2015
Structure of polymeric materials is of the most important factors in determination of the characteristics and properties of the membranes. Various research and developments on polymeric membranes confirm the direct correlation between structure ...
Mohammad Ali Semsarzadeh   +1 more
doaj   +1 more source

An improved method for the high isotacticity measurement of polybutene-1

open access: yesPolymer Testing, 2021
High isotactic polybutene-1 (HiPB) plays important roles in presenting outstanding resistance to creep and crack at high temperature. Therefore, rapid and accurate measurement of the HiPB is extremely important for both synthesis and application of ...
Weiping Zheng   +4 more
doaj   +1 more source

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