the isocyanates are widely used as precursors of polyurethane products, as well as carbamate insecticides. toluene 2,4-diisocyanate (tdi) is one of the most important commercially used isocyanates. humans may be exposed to tdi by inhalation, ingestion, dermal and eye contact. tdi is a powerful irritant to the mucosal membranes of the gastrointestinal and respiratory tracts, eyes and the skin. p...

The main objective of this search was to prepare novel soluble polyureas with improved thermal stability. Accordingly, a new types of polyureas was prepared through the polycondensation reaction of a prepared diamine containing ether, keto, and naphthyl groups with 4,4’-diphenylmethan diisocyanate (MDI), toluene-2,4-diisocyanate (TDI), and isophorone diisocyanate (IPDI) in N-methyl-2-pyrrol...

This paper focuses on the Singer-Loomis Type Deployment Inventory (SL-TDI), which is an alternative to the Myers-Briggs Type Indicator (MBTI). The SL-TDI utilizes a continuous, non-forced choice format and therefore is a more accurate representation of Jung's personality theory of psychological types. The purpose of the study reported here is to evaluate the reliability and validity of scores f...

The two-step polymerization method, including polycondensation and chain linking reactions, was conducted to obtain high-molecular-weight lactic acid polymers. The biodegradability of these polymers was subsequently investigated. Three polymerization routes were studied. Hydroxyl-terminated prepolymers were linked with diisocyanates, 1,6-hexamethylene diisocyanate (HMDI) or 1,4-butane diisocyan...