Benzophenone tetracarboxylic dianhydride BTDA

Two polymers have been prepared with the benzophenone tetracarboxylic dianhydride (BTDA) and either bis-l,3-(4-aminophenoxy)-benzene or bis-l,3-(4-aminophenoxy)-2-cyano-benzene (Fig. 5.6). Both polymers are soluble in NMP and their Tg values are respectively 191 and 243°C.59... 

Bottle waste, hydrolysis of, 564 Bottles PET, 21 recycled, 532 Branched polymers, 8 Branching, 13 Branching agents, 8 Branching sequence distributions, 446 Brill temperature, 142 Brominated epoxy reagents, 414 Bromination-lithiation, 354 BTDA. See 3,3, 4,4 -Benzophenone-tetracarboxylic dianhydride (BTDA)... 

Starting materials and solvents were purchased from Aldrich Chemical Co. acetonitrile (ACN), N,N-dimethylformamide (DMF), and N-methyl-2-pyrrolidone (NMP) were obtained anhydrous in Sure/Seal bottles and used as received. The polyamic acid of PMDA-ODA (2545 Pyralin) was supplied by DuPont. The soluble polyimide XU-218, derived from 3,3, 4,4 -benzophenone tetracarboxylic dianhydride (BTDA) and diamino-1,1,3-trimethyl-3-phenylindan isomers (DAPI) was purchased from Ciba-Geigy Corp. The acetylene terminated imide oligomer powder (Thermid MC-600) derived from BTDA, aminophenylacetylene, and 1,3-bis (2-aminophenoxy) benzene (APB) was obtained from National Starch and Chemical Company. Kapton Type II (PMDA-ODA) films were obtained from DuPont Co., Apical polyimide films were obtained from Allied Corp., and Upilex Type-S and Type-R polyimide films derived from 3,3, 4,4 -biphenyl tetracarboxylic dianhydride (BPDA) plus p-phenylenediamine (PDA) and ODA, respectively were obtained from ICI Americas Inc. 

Attempts to substitute benzophenone tetracarboxylic dianhydride (BTDA) for BPADA failed to produce high-molecular-weight copolymers because of the insolubility of the BTDA-mPD oligomers. A variety of solvents and solvent combinations were tried but were unsuccessful in solubilizing the intermediate oligomers. 

The feasibility of utilising similar intramolecular hydrogen abstraction reactions for photoinitiation was therefore tested (55). Reactions of 3,3, 4,4 -benzophenone tetracarboxylic dianhydride (BTDA) with primary n-alkyl amines readily yield a series of N-substitut i imides. 

PI-2545, and from 3,31,4,41-benzophenone tetracarboxylic dianhydride (BTDA) and ODA, PI-2555. Meta-phenylenediamine (MPD) is also present in PI-2555 as a minor component Q). Its presence has a negligible affect on the results of this study, other than a possible broadening of the spectral band ascribed to the rotation of the imide-phenyl bond, and hence will not be discussed further. 

Benzophenone tetracarboxylic dianhydride BTDA 2425-54-9 Barchlor 14 Barchlor 14S 1 -Chlorotetradecane 2425-66-3... 

Benzophenone tetracarboxylic dianhydride BTDA 219-368-0 Barchlor 14 Barchlor 14S 1 -Chlorotetradecane 219-370-1 Eutanol G16 Exxal 16 Guerbitol 16 Hexyldecanol ISOFOL 16 Jarcol 1-16 Primarol 1006 219-371-7 Araldite RD-2... 

Materials The materials in this work includ< a lyotropic polyamide (PBTA) composed of terephthaloyl dichloride and 2,2 -dimethyI-4,4-diamino-biphenyl two amorphous polyimides respectively con sting of 3,3 4,4-benzophenone tetracarboxylic dianhydride (BTDA) and 2,3,5,6-tetrameth -p-phenylene diamine (TMPD), as well as 4,4 -(hexafluoroisopropylidene)>bis(phthalic anhydride) (6FDA) and 2,2-dimethyl-4,4-diamino-biphenyl (DMDB) and the block copolymers composed of PBTA and those two polyimides with various compositions. Ilie PBTA/PI block copolymers and the corresponding homopolymers were prepared according to our previous work(79). 

The poly merblends of PI and polyvinylpyrrolidone (PVP) was used as precursor, assuming that the partially intermingled PVP phase in the continuous PI matrix will produce porous carbon structures by the decomposition of PVP during pyrolysis [62], PI was synthesized from benzophenone tetracarboxylic dianhydride (BTDA) and 4,4 -oxydianiline (ODA). Membranes were prepared by casting the polymer dope, either PI or PI/PVP blend, on a glass plate. The east polymer film was im-idized by stepwise heating up to 250°C and then carbonized at either 550 or 700°C. 

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