The monomer 4,4'-methylenebis
(cinnamaldehyde) (MBC) and its polythioamides were synthesized as reported method [16-17].
The DuPont Chambers Works in Deepwater, N.J., was a major producer of two carcinogens (beta-naphthylamine and benzidine) and two suspected bladder carcinogens (ortho-toluidine and 4,4'-methylenebis
Coagent/modifier Abbreviation Manufacturer Tert.- TBPB Merck KGaA, Darmstadt, Germany Butylperoxybenzoate Triallyl cyanurate TAC Merck KGaA, Darmstadt, Germany Divinylbenzene DVB Merck KGaA, Darmstadt, Germany 4,4'-methylenebis
MDI Merck KGaA, Darmstadt, Germany (phenyl isocyanate) Polyethylene glycol PEG 1500 Merck KGaA, Darmstadt, Germany 1500 Polyethylene glycol PEG 4000 Merck KGaA, Darmstadt, Germany 4000 Rapeseed oil -- Brokelmann+co--Oelmuhle GmbH+co, Hamm, Germany TABLE 2.
(2-chloroaniline) (MBOCA) is used as a curing agent in industries that primarily produce castable polyurethane parts; thus, occupational exposure may occur during the manufacturing processes in these industries [Agency for Toxic Substances and Disease Registry (ATSDR) 1994].
(phenyl isocyanate) and polyester-block-polyether [alpha], [omega]-diol were procured from Fiber Glast Developments.
The reagents used in this study are as follows: 4-4'-oxydianiline (ODA; 97% purity), 4,4'-methylenebis
(phenyl isocyanate) (MDI; 98% purity), N-methyl pyrolidinone (99% purity), and iodomethane were purchased from Sigma--Aldrich Company.
Epoxy resin/poly(ethylene oxide) blends were recognized to be miscible when cured with 1,3,5-tridroxybenzene (THB) , 4,4'-diaminodiphe-nylmethane (DDM) , 4,4'-methylenebis
(3-chloro-2,6-diethylaniline) (MCDEA) , and phthalate anhydride (PA) .
In our work, we intend to make epoxy thermosets from two diamines 4,4'-methylenebis
3-chloro 2,6-diethylaniline (MCDEA), 4,4'-diaminodiphenylsulfone (DDS) exhibiting nearly the same flexibility (i.e., the same [T.sub.g]) but very different reactivities.