The hydroxyl on the surface of the Si[O.sub.2] nanoparticles was reacted with 2-methyl-2-[(dodecylsulfanylthiocarbonyl) sulfanyl] propanoic acid and this esterification yielded a trithioester-capped Si[O.sub.2], which was used as a nanoparticle chain transfer agent (denoted as Si[O.sub.2]-CTA) to mediate the radical polymerization of isoprene to produce silicon dioxide-gra/r-polyisoprene nanoparticles (Si[O.sub.2]-g-PIP).
This is because fewer accelerators were adsorbed by the silanol groups of Si[O.sub.2]-g-PIP than by those of Si[O.sub.2] [35, 36], The reduction of the silanol groups was caused by the following two aspects: first, some of the silanol groups reacted with 2-methyl2-[(dodecylsulfanylthiocarbonyl)sulfanyl] propanoic acid to produce Si[O.sub.2]-CTA; second, many silanol groups were sheltered from the polyisoprene blocks of Si[O.sub.2]-g-PIP.
The major components analyzed in the liquid product include acetaldehyde, propanoic acid
, acrylic acid, lactic acid, 2,3-pentanedione; minor products include acetic acid, ethanol, acetone, etc.
Thus, this article aims to report on findings on the reaction mechanism of chlorination products through experimenting with propanoic acid
chlorinated by using the density function method with D[mol.sup.3] program of Materials Studio 5.5.
mucronata Retention time Components Area (%) Quality 3.882 Propanoic acid
1.16 85 11.505 Cyclopentane 1.77 88 11.818 Hydrazine carboxamide 0.93 80 13.778 Benzamide 1.76 82 18.159 Pentadecanoic acid 0.91 87 18.780 Phthalic acid 1.78 88 25.712 Hexanedioic acid 2.11 93 27.407 2-hydroxy-1-ethyl acetate 22.15 97 27.898 Mono (2-ethylhexyl) ester 2.33 81 28.385 Oxalic acid 0.80 88 29.280 Hexadecyl acetate 0.81 87 Table 7.
2-(5-Amino-2-oxo-1, 2-dihydrospiro (indole-3, 3-(1, 2, 4) triazol)-4(2H)-yl) propanoic acid
2-[3-Amino-5-methyl-5-(pyridin-3-yl)-1,5-dihydro-4H-1,2,4-triazol-4-yl]-3-hydroxy Propanoic Acid
. IR (KBr, [cm.sup.-1]) 3421, 3320, 3264, 2879, 2603, 1647, 1556, 1354, 1207, 1075, 710.
Lactic acid, HC3H5O3- 2- hydroxy- d- propanoic acid
, used for leaching experiments was reagent grade (90 wt % solution in water from Merck Chemicals).
, 2-oxo-, methylester###C4H6O3###76.36###0.03###72.03###3.25
(2R)-2-[(1S,4aS)-1-Hydroxy-4a,8-dimethyl-7-oxo1,2,3,4,4a,7-hexahydro-2-naphthal-enyl] propanoic acid
Ibuprofen (RS)-2-(4-(2-methylpropyl) phenyl) propanoic acid
) belongs to propanoic acid
derivatives class of non-steroidal anti-inflammatory drugs (NSAIDs).
Ibuprofen is one of several 2-aryl propanoic acids
that are currently on the market.