Results 61 to 70 of about 6,795 (264)
Correlation Between Vinyl Content of Recycled HDPE and Polymer Degradation: An NMR Approach
Journal of Applied Polymer Science, Volume 142, Issue 47, December 15, 2025.The degradation behavior of high‐density polyethylene (HDPE) during recycling depends on its vinyl group content. This study shows that 1H NMR spectroscopy enables accurate assessment of vinyl groups unlike FTIR. Changes in melt flow and molecular weight with multiple processing are linked to vinyl content which could enable tailor‐made re‐additivation
Kim Hao Ng +3 more
wiley +1 more source
Frontiers in Chemistry, 2018 A catalytic approach to synthesize microfine ultra-high molecular weight polyethylene (UHMWPE) particles was proposed based on the exploitation of nano-sized catalysts.
Patchanee Chammingkwan +3 more
doaj +1 more source
Structure of a Permethylcyclopentadienyl-μ-tetramethylcyclopentadienylmethylene Scandium Dimer [PDF]
, 1992 Bis(η^5-pentamethylcyclopentadienyl)-bis[μ-2,3,4,5-tetramethyl-1-methylene-ScC^1:Sc'(η^5)-cyclopentadienyl]-discandium(III), [Sc_2(C_(10)H_(15))_2-(C_(10)H_(14)_2], M_r = 628.90, triclinic, Pl, ɑ = 8.641 (5), b= 9.478 (2), c = 12.338 (5) Å, ɑ = 75.58 (3),
Bercaw, John E. +2 more
core +1 more source
Macromolecular Rapid Communications, Volume 46, Issue 23, December 5, 2025.Can artificial intelligence fully replace humans in polymer discovery? How can we effectively harness AI's potential while preserving human creativity, ethics, and expertise? Does AI introduce new biases and interpretability challenges into SDL? This perspective aims to answer these important questions and advocates for symbiotic human‐AI intelligence ...
Bahar Dadfar +2 more
wiley +1 more source
Hecheng xiangjiao gongyeThe precursor MgCl2 · nROH of supported Ziegler Natta catalyst was prepared by chemical activation method, and different pre catalysts TiCl4/MgCl2 (C-Cat) were prepared by loading TiCl4.
FAN Xun-zhang, ZHAO Yuan-jin, LUO Shu-fang, HE Ai-hua?
doaj +1 more source
ChemistryEurope, Volume 3, Issue 6, November 11, 2025.GA: We here report the first perarylated 2,3‐diboratabutadiene dianion and its reaction with Cp2MCl2 (M = Zr, Hf) to afford unprecedented 2,3‐diboratabutadiene π‐complexes with unique coordination modes. Addition of an N‐heterocyclic carbene (NHC) to the complexes gives rise to the donor‐induced oxidation of the BB bond, resulting in two separate NHC ...
Philipp Grewelinger +3 more
wiley +1 more source
Production of titanium tetrachloride (TiCl4) from titanium ores: A review [PDF]
Polyolefins Journal, 2017 Titanium (Ti) is the ninth most abundant element on earth. The titanium mineral ores are widely distributed in different parts of the world. The two main ores of titanium include rutile (TiO2) and ilmenite (FeO.TiO2).
Hossein Bordbar +2 more
doaj +1 more source
Molecular Weight Distributions in Ideal Polymerization Reactors. An Introductory Review [PDF]
, 2011 The ultimate aim of polymerization reaction engineering is the production of polymers with tailor-made properties. An introductory review into this field is presented, with emphasis on the effects on the molar mass distribution (MMD), of the sought ...
Meira, Gregorio Raul, Oliva, H.
core
CHAIN REGULARITY OF ISOTACTIC POLYPROPYLENE DETERMINED BY DIFFERENT THERMAL FRACTIONATION METHODS [PDF]
, 2014 The chain regularity of isotactic polypropylene (iPP) homo- and random copolymers was characterized by different thermal fractionation methods in this study. Different stepwise temperature programs were applied in a calorimeter (DSC), in order to develop
Doshev, Petar +6 more
core +1 more source
Copolymerization Studies of Vinyl Chloride and Vinyl Acetate with Ethylene Using a Transition-Metal Catalyst [PDF]
, 2002 Since the advent of Ziegler−Natta polymerization of ethylene, attempts have been made to extend coordination polymerization to commercially important monomers with polar functionality. In this study we examined the copolymerization of perdeuterated vinyl
Athey, Phillip S. +5 more
core +1 more source