نتایج جستجو برای: aget atrp

تعداد نتایج: 677  

2015
Yusuf Yagci Mehmet Atilla Tasdelen Baris Kiskan Mustafa Çiftci Sajjad Dadashi-Silab Omer Suat Taskin Gorkem Yilmaz

Visible light-induced atom transfer radical polymerization (ATRP) of vinyl monomers are examined by using various photocatalysts systems including Type I and Type II photoinitiators, dyes, dimanganese decacarbonyl and semiconducting photocatalysts. The influence of various experimental parameters on the polymerization such as type of light sources and photocatalyts, and concentration of metal c...

پلیمرشدن رادیکالی انتقال اتم (ATRP) استیرن در مجاورت نانوذرات میان‌متخلخل سیلیکا و در دمای  ۱۱۰ درجه سلسیوس انجام شد. روش‌های آغاز معکوس (RATRP) و نرمال و معکوس هم‌زمان (SR&NI ATRP) به عنوان دو روش مناسب  برای غلبه بر مشکلات اکسایش به‌کار گرفته شدند. ویژگی عمده در این دو روش آغاز، استفاده از کاتالیزورهای فلزی در حالت اکسایش بیشتر آنهاست که در این شرایط بر مشکلات مربوط به روش آغاز نرمال غلبه می‌...

Journal: :Chemical science 2017
Alexander Johnson Jeppe Madsen Paul Chapman Abdullah Alswieleh Omed Al-Jaf Peng Bao Claire R Hurley Michaël L Cartron Stephen D Evans Jamie K Hobbs C Neil Hunter Steven P Armes Graham J Leggett

Binary polymer brush patterns were fabricated via photodeprotection of an aminosilane with a photo-cleavable nitrophenyl protecting group. UV exposure of the silane film through a mask yields micrometre-scale amine-terminated regions that can be derivatised to incorporate a bromine initiator to facilitate polymer brush growth via atom transfer radical polymerisation (ATRP). Atomic force microsc...

2005
D. Robertson

A common strategy in mitigating secondary salinity in southern Australia is the planting of trees and other deep-rooted perennial vegetation. Planting needs to target areas where perennials will provide the most benefit by minimising runoff and groundwater recharge. A number of one-dimensional (1D) water balance models have been developed in Australia that predict water balance components (evap...

Journal: :Macromolecular Theory and Simulations 2011

Journal: :علوم و تکنولوژی پلیمر 0
حسین روغنی ممقانی محمد نجفی وحید حدادی اصل مهدی سلامی کلجاهی

styrene nanocomposites were synthesized by in-situ atom transfer radical polymerization at 110oc. the variations of monomer conversion and the linearity of semilogarithmic kinetic plot, some signs of living polymerizationand constant radical concentration in the reaction medium, were revealed by gas chromatography technique (gc). according to the gel permeation chromatography (gpc) results, the...

Journal: :Archives of ophthalmology 2007
Anthony Pane

P aget disease is a common condition characterized by increased bone turnover and abnormal bone deposition in the skull and vertebral column. This article describes a previously undiagnosed case of Paget disease in which the manifesting clinical symptom was gradually progressive diplopia from sixthnerve compression due to skull base hyperostosis. The sixth-nerve palsy, which was severe at the i...

Journal: :Macromolecules 2012
Daniel J Siegwart Matthias Leiendecker Robert Langer Daniel G Anderson

Conventional synthesis of polymers by ATRP is relatively low throughput, involving iterative optimization of conditions in an inert atmosphere. Automated, high-throughput controlled radical polymerization was developed to accelerate catalyst optimization and production of disulfide-functionalized polymers without the need of an inert gas. Using ARGET ATRP, polymerization conditions were rapidly...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2012
Shen Zhang Xiangchao Pang Dameng Guo Bo Zheng Shuxun Cui Hongwei Ma

Radical polymerization from a single initiator molecule in a microenvironment is a nearly ideal system in which bimolecular termination, solution concentration, and viscosity changes could be neglected. In this study, we provide two facile methods of preparing polymers via atom-transfer radical polymerization (ATRP) under single-initiator conditions: tether initiators on planar substrates at su...

Journal: :Journal of the American Chemical Society 2006
Jeremiah A Johnson Danielle R Lewis David D Díaz M G Finn Jeffrey T Koberstein Nicholas J Turro

A simple scheme involving atom transfer radical polymerization (ATRP) from a bifunctional initiator, conversion of the bromine end groups of the resulting telechelic polymer to azides, and cross-linking of this azido-telechelic macromonomer with multi-acetylene functionalized small molecules via copper-catalyzed azide-alkyne cycloaddition was employed to prepare the first tert-butyl acrylate mo...

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