PMID- 17444545
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20070928
LR  - 20090804
IS  - 0947-6539 (Print)
IS  - 0947-6539 (Linking)
VI  - 13
IP  - 20
DP  - 2007
TI  - Exhaustive analysis of frontal copolymerization of functionalized monovinyl and 
      divinyl monomers.
PG  - 5862-72
AB  - A series of copolymers of 2-hydroxyethyl methacrylate (HEMA)/glycidyl 
      methacrylate (GMA) and ethylene dimethacrylate (EGDM) were synthesized by frontal 
      polymerization (FP). This study was conducted to investigate the effect of 
      crosslink density, type and concentration of initiator, the use of a complex 
      initiator system, porogen, and diluent on the most relevant parameters of FP, 
      such as sustainability of the front, temperature profile, front velocity, and 
      yield. The products were also characterized for intruded pore volume, pore-size 
      distribution, epoxy-functionality number, and surface morphology. Higher 
      crosslink densities (CLDs) and initiator concentration produced higher front 
      velocities, whereas no trend in front temperature was noted. A complex initiation 
      system was effective in stabilizing and increasing the polymerization yield. 
      Relative to suspension polymerization (SP), FP products synthesized without a 
      solvent were microporous, whereas micro-to-macroporous products were obtained in 
      the presence of a solvent (for HEMA-EGDM polymers). We also present, explain, and 
      discuss the exotic patterns observed under a microscope. We observed two basic 
      types of spatial patterns, namely, planar and nonplanar patterns. The type of 
      planar pattern observed under scanning electron microscopy (SEM) has a spatial 
      impulse that appears as a loop followed by regular periodic motion in the radial 
      and axial directions. This behavior gives rise to a repeating pattern that is a 
      few microns thick. Also, nonplanar patterns, namely, layered concentric rings and 
      winding staircase patterns, were observed under SEM.
FAU - Pujari, Narahari S
AU  - Pujari NS
AD  - Polymer Science & Engineering Group, Chemical Engineering and Process Development 
      Division, National Chemical Laboratory, Pashan Road, Pune-411008, India.
FAU - Inamdar, Satish R
AU  - Inamdar SR
FAU - Ambekar, Jalindar D
AU  - Ambekar JD
FAU - Kulkarni, B D
AU  - Kulkarni BD
FAU - Ponrathnam, Surendra
AU  - Ponrathnam S
LA  - eng
PT  - Journal Article
PL  - Germany
TA  - Chemistry
JT  - Chemistry (Weinheim an der Bergstrasse, Germany)
JID - 9513783
EDAT- 2007/04/21 09:00
MHDA- 2007/04/21 09:01
CRDT- 2007/04/21 09:00
PHST- 2007/04/21 09:00 [pubmed]
PHST- 2007/04/21 09:01 [medline]
PHST- 2007/04/21 09:00 [entrez]
AID - 10.1002/chem.200601428 [doi]
PST - ppublish
SO  - Chemistry. 2007;13(20):5862-72. doi: 10.1002/chem.200601428.