نتایج جستجو برای: styrene polymerization

تعداد نتایج: 35989  

Journal: :علوم و تکنولوژی پلیمر 0
محمد دانشگر ابراهیم واشقانی فراهانی مهدی نکومنش حقیقی

in suspension polymerization, particle size distribution of polymer is the outcome of dynamic equilibrium between the break up and coalescence phenomena. the rates of break up and coalescence and consequently polymerization stability depend on several parameters, the most important of which are type and concentration of stabilizer. in this study, the effects of type and concentration of stabili...

2010
Yi-bo Wu Ping Ren Wenli Guo Shu-xin Li Xiao-ping Yang Yu-wei Shang

INTRODUCTION With the development of living cationic polymerization of isobutylene (IB)1 and styrenic monomers,2–5 the synthesis of ABA triblock copolymer thermoplastic elastomers (TPEs) with polyisobutylene (PIB) as rubbery middle segments and styrenic polymers as plastic outer segments became possible. TPEs with PIB rubbery segments inherently exhibit superior oxidative, chemical and thermal ...

Journal: :Chemical communications 2003
Zhenning Yu Xinhua Wan Hailiang Zhang Xiaofang Chen Qifeng Zhou

Free radical polymerization of (+)-2,5-bis[4'-((S)-2-methylbutyloxy)phenyl]styrene yields a chiral polymer with memory of optical activity after the initial stereogenic center in the side group of the monomer is chemically removed.

Journal: :Chemical communications 2011
Hisashi Shimakoshi Masashi Nishi Akihiro Tanaka Katsumi Chikama Yoshio Hisaeda

The hybrid polymer was synthesized by a radical polymerization of a B(12) derivative and a Ru complex having styrene moieties in each peripheral position, and the hybrid polymer showed photocatalytic activity for molecular transformation with visible light irradiation.

Journal: :Dalton transactions 2008
Giles W Theaker Colin Morton Peter Scott

A group of readily available zirconium catalysts incapable of ethene-co-styrene polymerization are remarkably active and selective for the production of the new polymer ethene-co-tert-butylstyrene via a single site mechanism.

Journal: :Chemical communications 2014
Tong Huang Xiaohua Huang Xiaoyi Sun Yongfeng Zhou Yongping Bai Deyue Yan

This study describes a new method to prepare monodisperse polystyrene (PS) colloidal nanoparticles with controlled size ranging from 60 nm to 140 nm by the direct polymerization of styrene and divinylbenzene inside the bilayers of the polydisperse hyperbranched polymer vesicles.

Journal: :Chemical communications 2005
Guillaume Delaittre Julien Nicolas Catherine Lefay Maud Save Bernadette Charleux

Amphiphilic hairy nanoparticles are prepared in a one step, batch, heterogeneous polymerization of styrene or n-butyl acrylate, using a water-soluble poly(sodium acrylate) alkoxyamine macroinitiator based on the SG1 nitroxide.

Journal: :journal of nanostructures 2013
m. mirzataheri

higher solid contents (20 % and 40 %) nanocomposites of poly (styrene-co-butyl acrylate) including higher content of cloisite 30b (7 wt% and 10 wt %) were prepared via miniemulsion polymerization. stability of the final latexes proved outstanding combination of polymerization procedure and surfactants. morphological studies revealed by tem, sax and xrd showed three structures of core-shell, arm...

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