Results 111 to 120 of about 87,752 (306)

Styrene monomer as potential material for design of new optoelectronic and nonlinear optical polymers: density functional theory study

Royal Society Open Science
Using density functional theory, we have studied the intrinsic properties of styrene. First, we determine the optimized structures, structural parameters and thermodynamic properties to make our simulations more realistic to experimental results and ...
P. Noudem, D. Fouejio, C. D. D. Mveme, S. S. Zekeng   +3 more
doaj   +1 more source

Hoveyda–Grubbs catalysts with an N→Ru coordinate bond in a six-membered ring. Synthesis of stable, industrially scalable, highly efficient ruthenium metathesis catalysts and 2-vinylbenzylamine ligands as their precursors

Beilstein Journal of Organic Chemistry, 2019
A novel and efficient approach to the synthesis of 2-vinylbenzylamines is reported. This involves obtaining 2-vinylbenzylamine ligands from tetrahydroisoquinoline by alkylation and reduction followed by the Hofmann cleavage.
Kirill B. Polyanskii, Kseniia A. Alekseeva, Pavel V. Raspertov, Pavel A. Kumandin, Eugeniya V. Nikitina, Atash V. Gurbanov, Fedor I. Zubkov   +6 more
doaj   +1 more source

Simulação numérica aplicada para avaliar o efeito da pré-polimerização no comportamento de reatores tubulares Numerical simulation to evaluate the effect from pre-polymerization on the behavior of tubular reactors

Polímeros, 2007
O presente estudo utiliza um modelo matemático fenomenológico para simular um sistema de polimerização contínuo em dois estágios. Este sistema é composto por um reator contínuo tipo tanque agitado (CSTR), para pré-polimerização do monômero (primeiro ...
André L. Nogueira, Ricardo A. F. Machado, Marintho B. Quadri, Liliane M. F. Lona   +3 more
doaj   +1 more source

Synthesis and styrene copolymerization of novel halogen and methoxy ring-disubstituted tert-butyl phenylcyanoacrylates

, 2022
Novel ring-disubstituted tert-butyl phenylcyanoacrylates, RPhCH=C(CN)CO2C(CH3)3, where R is 3-bromo-4-methoxy, 5-bromo-2-methoxy, 2-chloro-3-methoxy, 2-fluoro-4-methoxy, 2-fluoro-6-methoxy, 3-fluoro-4-methoxy, 5-fluoro-2-methoxy, 3-iodo-4-methoxy, 5-iodo-
Riley , Hrasky, Kent D. , Le-Vu, Sara M. , Schjerven, Mariyah H. , AbdurRahman, Kumayl K. , Ahmed, Sonja G. , Collins, Nicholas M. , Tassone, Jennifer E. , Blackburn, Karina , Lopez, Sarrah, Asgarali, Alexander , Eremin, Gregory B., Kharas   +11 more
core   +1 more source

Grip and Grasp: Lizard Claw Inspired Robotic Manipulators

Advanced Robotics Research, EarlyView.
Our study identifies the most effective lizard claw shape for use as an end effector in a bioinspired robotic manipulator. By examining key geometric features and combining them into comparative indices, the Crotaphytus collaris claw is found to be the best fit.
Hyeon Lee, Kate Douglas, Asyiah Bray, Andrea Rummel, Parvez Alam   +4 more
wiley   +1 more source

MODIFICATION EFFECT OF AL2O3 NANOFIBRES AND MALEIC ANHYDRIDE STYRENE COPOLYMER ON ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE: MECHANIC AND TRIBOLOGICAL PROPERTIES

Advanced Engineering Research, 2012
The test results on the mechanical and tribological properties of the composite materials based on ultrahigh molecular weight polyethylene, chemically styrenated by maleic anhydride, depending on the component s and filler content, such as aluminium ...
Victor V. Ilyasov, Van Chuong Nguyen
doaj  

Carbolithiation of N-alkenyl ureas and N-alkenyl carbamates

Beilstein Journal of Organic Chemistry, 2013
N-Alkenyl ureas and N-alkenyl carbamates, like other N-acyl enamines, are typically nucleophilic at their β-carbon. However, by incorporating an α-aryl substituent, we show that they will also undergo attack at the β-carbon by organolithium nucleophiles,
Julien Lefranc, Alberto Minassi, Jonathan Clayden   +2 more
doaj   +1 more source

Synthesis and Potential Metal Absorbtion of Carbohydrate Polymer Derivatives

, 1999
Our investigation focused on finding an efficient way to detect heavy metal contaminants in polluted water resources. Ideally, the detector used should be comprised of a naturally occurring material that, with its presence in the system, will not add to ...
Davis, Todd
core  

Utilização de iniciadores multifuncionais na polimerização do estireno em suspensão [PDF]

, 2004
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia QuímicaOs estudos a cerca de todos os aspectos que envolvem materiais termoplásticos tem recebido uma singular atenção a partir ...
Arioli, Rafael
core  

Physics‐Embedded Neural Network: A Novel Approach to Design Polymeric Materials

Advanced Science, EarlyView.
Traditional black‐box models for polymer mechanics rely solely on data and lack physical interpretability. This work presents a physics‐embedded neural network (PENN) that integrates constitutive equations into machine learning. The approach ensures reliable stress predictions, provides interpretable parameters, and enables performance‐driven, inverse ...
Siqi Zhan, Hengheng Zhao, Haotian Wang, Zhanjie Liu, Qian Li, Weifeng Zhang, Qingsong Zhao, Liqun Zhang, Jun Liu   +8 more
wiley   +1 more source