Free‐radical emulsion copolymerization of styrene with butadiene and vinyl triethoxysilane with a cumene hydroperoxide redox initiator

2019 ◽  
Vol 136 (34) ◽  
pp. 47896 ◽  
Author(s):  
Changjie Yin ◽  
Qiuyu Zhang ◽  
Zhuorui Zhang ◽  
Chengyuan Zhu ◽  
Jianxun Liu
Keyword(s):  
Free Radical ◽  
Cumene Hydroperoxide ◽  
Emulsion Copolymerization ◽  
Redox Initiator ◽  
Vinyl Triethoxysilane

Design of Pressure-Sensitive Adhesives by Free-Radical Emulsion Copolymerization of Methyl Methacrylate and 2-Ethylhexyl Acrylate. 1. Kinetic Study and Tack Properties

2001 ◽  
Vol 13 (8) ◽  
pp. 2562-2566 ◽  
Author(s):  
A. Aymonier ◽  
E. Papon ◽  
J.-J. Villenave ◽  
Ph. Tordjeman ◽  
R. Pirri ◽  
...  
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Kinetic Study ◽  
Emulsion Copolymerization ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive

THE ROLE OF ALPHA-KETOLS IN THE LOW-SUGAR REDOX RECIPE FOR LOW TEMPERATURE EMULSION COPOLYMERIZATION

1951 ◽  
Vol 29 (11) ◽  
pp. 949-958
Author(s):  
R. J. Orr ◽  
H. Leverne Williams
Keyword(s):  
Free Radical ◽  
Ferrous Iron ◽  
Reaction Rate ◽  
Catalyst System ◽  
Emulsion Copolymerization ◽  
Peroxy Compounds ◽  
Induced Decomposition ◽  
Amine Compounds ◽  
Better Than

It was found that the induced decomposition of peroxy compounds could lead to faster rates of polymerization or practical rates of polymerization at lower temperatures. In Germany polymerization recipes were developed containing a peroxy compound in the oil phase, a reducer in the aqueous phase and a metal carrier. This idea was transferred to America after the war and became the basis of the present recipes used in the production of cold rubbers. As reducers the most commonly used appear to be digested d-glucose or an excess of ferrous iron but recently the polyamines and other amine compounds have been found to be quite effective. The mixture of amine and sugar was better than either alone. It has been shown that this mixture will function in the presence of reactive monomers such as acrylonitrile. The role of such reducers is of considerable interest so that further studies were undertaken. The results obtained may be illustrated by acetoin. As the amount of acetoin is increased in the recipe the amount of ferrous iron required for maximal conversion in a given time is decreased. This is because at higher than the optimal amounts, although the reaction rate is still increasing, the catalyst system is rapidly exhausted so that the reaction dies at a lower conversion. The data can be explained by assuming formation of free radicals by the induced decomposition of the peroxide either by the acetoin, the ferrous iron, or a complex between the iron and acetoin. This free radical then initiates polymerization. The acetoin free radical residue can induce the further decomposition of the peroxide or possibly can reduce ferric iron to ferrous. Other compounds yield similar results.

EMULSION/MINIEMULSION POLYMERIZATION OF BUTYL ACRYLATE WITH THE CUMENE HYDROPEROXIDE/TETRAETHLENEPENTAMINE REDOX INITIATOR

2001 ◽  
Vol 9 (3) ◽  
pp. 183-197 ◽  
Author(s):  
Yingwu Luo ◽  
F. Joseph Schork ◽  
Yulin Deng ◽  
Zegui Yan
Keyword(s):  
Butyl Acrylate ◽  
Cumene Hydroperoxide ◽  
Miniemulsion Polymerization ◽  
Redox Initiator

scholarly journals Free radical intermediate in the N-demethylation of aminopyrine by catalase-cumene hydroperoxide system.

1980 ◽  
Vol 28 (2) ◽  
pp. 683-685 ◽  
Author(s):  
HIROTERU SAYO ◽  
MIKIO HOSOKAWA
Keyword(s):  
Free Radical ◽  
Cumene Hydroperoxide ◽  
Radical Intermediate ◽  
Free Radical Intermediate

2-(Methacryloyloxyethyl) Trimethyl Ammonium Chloride Grafted onto Natural Rubber in Latex State

2015 ◽  
Vol 1105 ◽  
pp. 293-298
Author(s):  
Pairote Klinpituksa ◽  
Nurhayatee Chekmae ◽  
Salinee Borthoh
Keyword(s):  
Natural Rubber ◽  
Ammonium Chloride ◽  
Cumene Hydroperoxide ◽  
Vinyl Monomers ◽  
Trimethyl Ammonium Chloride ◽  
Out Of Plane ◽  
Redox Initiator ◽  
Initiator System ◽  
Ftir Spectrophotometry ◽  
Tetraethylene Pentamine

The grafting of polar vinyl monomers onto natural rubber is usually investigated to modify specific properties of natural rubber. The aim of this research was to graft copolymerize 2-(methacryloyloxyethyl) trimethyl ammonium chloride (MAETAC) onto natural rubber (NR), using cumene hydroperoxide (CHP) and tetraethylene pentamine (TEPA) as a redox initiator system. The effects of the initiator system, the monomer, and the reaction temperature and time on grafting were investigated. The grafted product was characterized by FTIR spectrophotometry. The grafting tendency was determined by using the relative absorbance ratio of A1725/A842, which compares the C=O stretching in MAETAC with the =CH out-of-plane bending in natural rubber moieties. Near optimal grafting was obtained with CHP and TEPA both at 0.15 phr, monomer at 20 phr, reacted at 65°C for 120 minutes. The grafting percentage of NR-g-MAETAC was 6.10 as determined by ATR-FTIR.

Kinetics of emulsion copolymerization. II. Effect of free radical desorption on the rate of emulsion copolymerization of styrene and methyl methacrylate

1982 ◽  
Vol 27 (7) ◽  
pp. 2483-2501 ◽  
Author(s):  
M. Nomura ◽  
K. Yamamoto ◽  
I. Horie ◽  
K. Fujita ◽  
M. Harada
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Emulsion Copolymerization ◽  
Kinetics Of

Water-Based Coatings for Building Part I: Preparation and Physical Properties of Polyacrylate-Siloxane Emulsion

2012 ◽  
Vol 174-177 ◽  
pp. 520-523 ◽  
Author(s):  
Pei Wang ◽  
Xia Zhen Zhang ◽  
Li Na Heng ◽  
Teng Yu ◽  
Xie Wei Chen ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Physical Properties ◽  
Optimal Conditions ◽  
Pencil Hardness ◽  
Emulsion Copolymerization ◽  
Stirring Rate ◽  
Water Based ◽  
Acrylate Emulsion ◽  
Vinyl Triethoxysilane ◽  
Silicone Acrylate

This study is to report the synthesis of polyacrylate-siloxane latex with vinyl triethoxysilane(DB-151), methyl methacrylate(MMA) acrylic acid(AA), butyl acrylate(BA) by emulsion copolymerization and characterized by FTIR. The physical properties are also analysized by water absorption, pencil hardness, circle adhesion method, etc.. The polymerization factors for emulsion had been discussed in several aspects. The results showed that the optimal conditions for synthesizing silicone-acrylate emulsion were of DB -151content of 6%~8%, emulsifier OP-10/SDS/ DNS-458 ratio:2/1/1, in stirring rate 450 r/min in the period of disperse and emulsification, stirring rate 200 r/min in the period of synthesis, with reaction temperature 75°C.

Synthesis and Basic Properties of Fluorinated Core-Shell Acrylic Latexes Containing Perfluoroalkyl Acrylate in the Shell

2013 ◽  
Vol 339 ◽  
pp. 665-669
Author(s):  
Quan Liu ◽  
Wei Ming Tang ◽  
Yi Chi Chen ◽  
Min Huang
Keyword(s):  
Corrosion Resistance ◽  
Fourier Transform ◽  
Free Radical ◽  
Chemical Composition ◽  
Core Shell ◽  
Emulsion Copolymerization ◽  
Basic Properties ◽  
Acrylic Monomers ◽  
Core Shell Structure ◽  
Acrylic Latexes

Fluoroacrylic copolymer latexes with core-shell structure were synthesized by free-radical emulsion copolymerization, using fluorine-containing acrylic monomer of dodecafluoroheptyl methacrylate (DFMA) and fluorine-free acrylic monomers. The chemical composition was characterized by Fourier transform infrared (FTIR) spectroscopy. The basic properties of the latexes including mainly hydrophobicity, chemical stability, chemicals-and corrosion-resistance were investigated. Significant improvement in the chemicals-and corrosion-resistance were observed for the fluorinated copolymer although only 5 wt% (based on the total monomers amount) of DFMA was copolymerized.

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