In-plane functionalizing graphene nanolayers with polystyrene by atom transfer radical polymerization: Grafting from hydroxyl groups

2013 ◽  
Vol 35 (2) ◽  
pp. 386-395 ◽  
Author(s):  
Hossein Roghani-Mamaqani ◽  
Vahid Haddadi-Asl
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Hydroxyl Groups ◽  
Atom Transfer ◽  
Grafting From ◽  
Graphene Nanolayers

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.

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