Treatment toluene diisocyanate

FIGURE 5.65 Insolubilization of polyethylenimine by treatment with toluene diisocyanate or phthaloyl dichloride. 

Effects of various chemical treatments such as sodium hydroxide, isocyanate, permanganate, and peroxide on the tensile properties of sisal fiber-reinforced low-density polyethylene (LDPE) composites were investigated. Sodium hydroxide treated fiber composites showed better tensile properties than xmtreated composites, and the enhancement was attributed to their rough surface topography and increased aspect ratio. It was reported that long chain structured cardanol derivative of toluene diisocyanate (CTDIC) treatment reduces the hydrophilic nature of the sisal fiber resulting in improved compatibility and dispersion. It was also reported that peroxide treatment of fiber showed maximum interfacial interactions [33]. 

Toluene diisocyanate (TDIC) treatment Makes fiber surface irregular as particles are adhered to surface. 

Cellulose propionate was obtained from Eastman Chemical Company, Kingsport, TN. The mono-functional segments were synthesized in our laboratory as described previously (27, 28). Briefly, per-pnq>ionylated cellulose ester (CTP) was hydrolyzed with HBr in propionic anhydride and isolated by precipitation in water. The partially hydrolyzed CTP-oligomers were converted from the OH- to the NCO-terminated CTP derivatives by treatment with toluene diisocyanate (TDI) (27). The NCO-terminated, monofunctional segments were then reacted with various fluoro-alkyl alcohols to yield F-containing CTP telechelic copolymers. This procedure has been... 

In comparative studies, [ C]toluene 2,4-diamme, the hydrolysis product of [ ]-toluene 2,4-diisocyanate, was administered to rats at doses of 3 mg/kg bw (orally or intravenously) and 60 mg/kg bw orally. After 48 h, the distribution of radioactivity was similar in all cases (urine, 64-72% faeces, 20-31% and tissue/carcass/gastrointestinal tract, 2-5%). Comparison of the toluene 2,4-diisocyanate inhalation group with the oral toluene 2,4-diisocyanate and toluene 2,4-diamine treatment groups indicated that a larger percentage of the inhaled radioactivity was in the tissues/carcass and that excretion of radioactivity into the urine was slower following toluene 2,4-diisocyanate inhalation. 

An acetal-protected lithium initiator was used to polymerize styrene followed by linking with 1,3,5-triallyloxy-2,4,6-triazine to produce three-arm star polystyrenes.73 The protective acetal group was cleaved by weak acidic treatment in THF to give star polymers with terminal OH groups. These functional groups were coupled with toluene-2,4-diisocyanate to give randomly cross-linked products. Unfortunately, few characterization data were provided in this study. 

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