On inoculation with Bacillus cereus in 25,000 ppm of profenofos added soil, the resultant metabolites were Isopropyl benzene, n- propyl benzene
, 1-ethyl-2-methyl benzene, 1,2,4-trimethyl benzene, 1,2,3 Tri methyl benzene, 4-ethyl-1, 2-dimethyl benzene, 2- isopropyl benzaldehyde, 4 ethyl 1,2-dimethyl benzene and 4-bromo-2 chloro phenol (fig 2a,2b).
On the basis of the characteristics described in the introduction of molecular fortifiers, propyl benzene is selected as a compound that should not act as a fortifier.
The fortifier compounds (and propyl benzene) are blended with the desired amount of epoxy resin and amine curatives by hand with the exception of DMS.
Propyl benzene (the control plasticizer) and DMC are also both easily blended with the epoxy resin and cured within the network.
The addition of propyl benzene decreases the density of the network as would be predicted by a rule of mixtures.
The propyl benzene is expected to act as a plasticizer for the epoxy and indeed it decreases the [T.sub.g] the most.
As expected the propyl benzene acts as a plasticizer and a drop in modulus is observed.
The sample containing propyl benzene also shows a reduction in yield stress as is expected.
Table 3 - common VOCs emitted from SBR Compound Comments 4-vinyl cyclohexene Butadiene dimer 1,5 cyclooctadiene Butadiene dimer 1,2-divinyl cyclobutadiene Butadiene dimer Methyl benzene Styrene Xylene (o, p & m) Propyl benzene
Benzaldehyde Cyclohexane, 1-methyl-4-(1-methylethyl) Napthalein Benzothiazole 4-phenyl cyclohexene Styrene-butadiene dimer Indenes Tetramethylthiourea
Isopropanol + benzene [right arrow] Propyl benzenes