PMID- 18986178
OWN - NLM
STAT- MEDLINE
DCOM- 20090323
LR  - 20181201
IS  - 0743-7463 (Print)
IS  - 0743-7463 (Linking)
VI  - 24
IP  - 23
DP  - 2008 Dec 2
TI  - Self-assembly of brush-like poly[poly(ethylene glycol) methyl ether methacrylate] 
      synthesized via aqueous atom transfer radical polymerization.
PG  - 13279-86
LID - 10.1021/la802734e [doi]
AB  - Self-assembly of brush-like well-defined poly[poly(ethylene glycol) methyl ether 
      methacrylate] homopolymers, abbreviated as P(PEGMA-475) and P(PEGMA-1100) is 
      investigated in aqueous solution by employing dynamic/static light scattering 
      (DLS/SLS) and transmission electron microscopy (TEM), whereas 475 and 1100 is 
      molar mass of the respective PEGMA macromonomer. The mentioned brush-like 
      homopolymers are synthesized by aqueous ATRP at room temperature. The critical 
      association concentration (CAC) of the synthesized polymers in water depends on 
      the length of the PEG side chains but not on the overall molar mass of the 
      polymer. Thus, approximately the same CAC of approximately 0.35 mg/mL is 
      estimated for various P(PEGMA-1100) samples, and approximately 0.7 mg/mL is 
      estimated for P(PEGMA-475) series. All the investigated P(PEGMA-1100) samples 
      form multimolecular micelles in aqueous solution, where the hydrodynamic size 
      (Rh) and the aggregation number (Nagg) of micelles decreases as the molecular 
      weight of P(PEGMA-1100) increases. This can be attributed to the increased steric 
      hindrances between the PEG side chains in corona of micelles formed by higher 
      molar mass P(PEGMA-1100). The tendency of micelle formation by samples of 
      P(PEGMA-475) series is significantly lower than that of P(PEGMA-1100) series, as 
      demonstrated by their significantly higher CAC and micelles of lower Nagg. The Rh 
      of micelles does not depend strongly on polymer concentration, which suggests 
      that these micelles are formed via the closed association model. Micelles formed 
      by P(PEGMA-1100) series slightly shrink with increase in temperature from 25 to 
      60 degrees C, while those of P(PEGMA-475) series are found to be insensitive to 
      the same temperature variation. Finally, TEM is carried out to visualize the 
      formed micelles after transferring the aqueous solution to carbon film.
FAU - Hussain, Hazrat
AU  - Hussain H
AD  - Institute of Materials Research and Engineering, Agency for Science, Technology 
      and Research, 3 Research Link, Singapore. h-hussain@imre.a-star.edu.sg
FAU - Mya, Khine Yi
AU  - Mya KY
FAU - He, Chaobin
AU  - He C
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Langmuir
JT  - Langmuir : the ACS journal of surfaces and colloids
JID - 9882736
RN  - 0 (Free Radicals)
RN  - 0 (Micelles)
RN  - 059QF0KO0R (Water)
RN  - 3WJQ0SDW1A (Polyethylene Glycols)
RN  - 9011-14-7 (Polymethyl Methacrylate)
SB  - IM
EIN - Langmuir. 2012 Aug 28;28(34):12690
MH  - Free Radicals/chemistry
MH  - Light
MH  - Micelles
MH  - Microscopy, Electron, Transmission/methods
MH  - Molecular Structure
MH  - Particle Size
MH  - Polyethylene Glycols/*chemical synthesis/chemistry
MH  - Polymethyl Methacrylate/*chemical synthesis/chemistry
MH  - Scattering, Radiation
MH  - Surface Properties
MH  - Temperature
MH  - Water/chemistry
EDAT- 2008/11/07 09:00
MHDA- 2009/03/24 09:00
CRDT- 2008/11/07 09:00
PHST- 2008/11/07 09:00 [pubmed]
PHST- 2009/03/24 09:00 [medline]
PHST- 2008/11/07 09:00 [entrez]
AID - 10.1021/la802734e [doi]
PST - ppublish
SO  - Langmuir. 2008 Dec 2;24(23):13279-86. doi: 10.1021/la802734e.