Kinetic study of styrene atom transfer radical polymerization from hydroxyl groups of graphene nanoplatelets: Heterogeneities in chains and graft densities

2014 ◽  
Vol 55 (8) ◽  
pp. 1720-1732 ◽  
Author(s):  
Hossein Roghani-Mamaqani ◽  
Vahid Haddadi-Asl ◽  
Khezrollah Khezri ◽  
Mehdi Salami-Kalajahi ◽  
Mohammad Najafi
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Kinetic Study ◽  
Radical Polymerization ◽  
Graphene Nanoplatelets ◽  
Hydroxyl Groups ◽  
Atom Transfer

Confinement effect of graphene nanoplatelets on atom transfer radical polymerization of styrene: grafting through hydroxyl groups

2014 ◽  
Vol 24 (1) ◽  
pp. 51-62 ◽  
Author(s):  
Hossein Roghani-Mamaqani ◽  
Vahid Haddadi-Asl ◽  
Khezrollah Khezri ◽  
Mehdi Salami-Kalajahi ◽  
Mohammad Najafi ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Graphene Nanoplatelets ◽  
Confinement Effect ◽  
Hydroxyl Groups ◽  
Atom Transfer ◽  
Grafting Through

Polystyrene-grafted graphene nanoplatelets with various graft densities by atom transfer radical polymerization from the edge carboxyl groups

RSC Advances ◽  
2014 ◽  
Vol 4 (47) ◽  
pp. 24439-24452 ◽  
Author(s):  
Hossein Roghani-Mamaqani ◽  
Vahid Haddadi-Asl ◽  
Khezrollah Khezri ◽  
Mehdi Salami-Kalajahi
Keyword(s):  
Graphene Oxide ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Graphene Nanoplatelets ◽  
Carboxyl Groups ◽  
Atom Transfer

An initiator containing modifier, 4-hydroxybutyl 2-bromopropionate (CBr), was synthesized by the reaction of 1,4-butanediol and alpha-bromoisobutyryl bromide. Subsequently, graphene oxide was functionalized with CBr to yield initiator-anchored graphene (GCBr). Then, GCBr was used as the precursor for ATRP of styrene.

SURFACE-INITIATED ATOM TRANSFER RADICAL POLYMERIZATION OF HYDROXYETHYL ACRYLATE FROM ACTIVATED CARBON POWDER WITH HOMOGENIZED SURFACE GROUPS

2007 ◽  
Vol 14 (02) ◽  
pp. 269-275 ◽  
Author(s):  
PENG LIU ◽  
TINGMEI WANG
Keyword(s):  
Activated Carbon ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Photoelectron Spectroscopy ◽  
Water System ◽  
Carbon Powder ◽  
Hydroxyl Groups ◽  
Atom Transfer ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups

The well-defined poly(hydroxyethyl acrylate) (PHEA) brushes were grafted from the surfaces of the activated carbon (AC) powder with the controlled/"living" radical polymerization technique. First, surface functional groups of the AC powder were homogenized to hydroxyl groups by oxidizing with nitric acid and then reducing with lithium tetrahydroaluminate ( LiAlH 4) at first. Second, the surface hydroxyl groups were treated with bromoacetylbromide, and the bromoacetyl groups were introduced. And in the third step, the bromoacetyl activated carbon ( BrA-AC ) powder were used as macro-initiators for the surface-initiated atom transfer radical polymerization (SI-ATRP) of hydroxyethyl acrylate (HEA) in the presence of 1,10-phenanthroline and Cu(I)Br as catalyst in a water system. The graft parameters calculated from the elemental analyses (EA) results, conversion of monemer (C%) and percentage of grafting (PG%) were 5.74% and 28.7%, respectively, after polymerizing for 5 h. The graft polymerizations exhibited the characteristics of a controlled/"living" polymerization, and no homopolymer was found in the proposed polymerizing process. The preparation procedure of the poly(hydroxyethyl acrylate) grafted activated carbon (PHEA-AC) powder was also investigated by X-ray photoelectron spectroscopy (XPS). The PHEA-AC powder is expected to be used as selective adsorbents because of their abundant homogenized surface hydroxyl groups.

Synthesis of polypropylene graft copolymers from a hydroxyl-groups-containing polypropylene precursor via atom-transfer radical polymerization

2006 ◽  
Vol 55 (6) ◽  
pp. 675-680 ◽  
Author(s):  
Liaoyun Zhang ◽  
Guoqiang Fan ◽  
Cunyue Guo ◽  
Jin-Yong Dong ◽  
Youliang Hu ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Graft Copolymers ◽  
Hydroxyl Groups ◽  
Atom Transfer

Surface-initiated atom transfer radical polymerization on cotton fabric in water aqueous

2012 ◽  
Vol 83 (4) ◽  
pp. 363-370 ◽  
Author(s):  
Tieling Xing ◽  
Jie Liu ◽  
Shiwei Li
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Cotton Fabric ◽  
Control Sample ◽  
Attenuated Total Reflection ◽  
Hydroxyl Groups ◽  
Atom Transfer ◽  
Amino Groups ◽  
X Ray ◽  
Tertiary Amino

In this work, 2-bromoisobutyryl bromide was first reacted with the hydroxyl groups on the surface of cotton fabric to obtain cotton macroinitiator (C-Br) for surface-initiated atom transfer radical polymerization (ATRP) of (2-dimethylamino)ethyl methacrylate (DMAEMA). Then C-Br was grafted with DMAEMA via the ATRP method in water aqueous. The tertiary amino groups of immobilized DMAEMA polymer on the cotton fabric were quaternized with bromomethane to produce the antibacterial function. The structure of cotton-grafted-PDMAEMA (C-g-PDMAEMA) was characterized by attenuated total reflection–Fourier transform infrared spectroscopy, scanning electron microcopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results show that DMAEMA was grafted onto the surface of cotton and the tertiary amino groups were quaternized. The C-g-PDMAEMA has good thermostability. The whiteness and strength of C-g-PDMAEMA decreased slightly, but the wrinkle recovery angle increased distinctly compared with the control sample. The quaternized grafted cotton has the great antibacterial property and good laundry resistance.

Synthesis of Amylopectin Macro-Initiator for Graft Copolymerization of Amylopectin-g-Poly(Methyl Methacrylate) by ATRP (Atom Transfer Radical Polymerization)

2015 ◽  
Vol 827 ◽  
pp. 306-310 ◽  
Author(s):  
Aniek S. Handayani ◽  
Is Sulistyati Purwaningsih ◽  
Muhamad Chalid ◽  
Emil Budianto ◽  
Dedi Priadi
Keyword(s):  
Methyl Methacrylate ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Graft Copolymer ◽  
Graft Copolymerization ◽  
Homogeneous System ◽  
Hydroxyl Groups ◽  
Atom Transfer ◽  
Tert Butyl ◽  
Product Characterization

Graft copolymer of Amylopectin and PMMA was synthesized by atom transfer radical polymerization (ATRP) method. The hydroxyl groups of amylopectin partially substituted with tert-butyl a-bromoisobutyrate to form tert-butyl a-bromoisobutyrate (TBBiB ) groups. This compound is known as an efficient macro-initiator for ATRP process. This research, aimed to obtain a bio based polymer of Amylopectin, in which the amylopectin was used as macro-initiator in the ATRP of MMA. The experiment was carried out in the homogeneous system under temperature range of 40 – 70°C in DMSO solution using TEA as catalyst. The modified amylopectin-TBBiB then was grafted to methyl methacrylate trough ATRP. Product characterization indicates that the graft copolymer Amylopectin-g-PMMA is efficient and the obtained product owns well defined structures

Kinetic study of the atom transfer radical polymerization ofn-docosyl acrylate

2005 ◽  
Vol 97 (5) ◽  
pp. 2147-2154 ◽  
Author(s):  
Prakash J. Saikia ◽  
Narendra N. Dass ◽  
Shashi D. Baruah
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Kinetic Study ◽  
Radical Polymerization ◽  
Atom Transfer
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