The solubility of phthalic anhydride was measured at 283–313 K under atmospheric pressure in ethyl acetate, n -propyl acetate, methyl acetate, acetone, 1,4-dioxane, n -hexane, n -butyl acetate, cyclohexane, and dichloromethane. The solubility of phthalic anhydride in all solvents increased with...
A series of polyimides (PIs) with low dielectric constant were synthesized via a polycondensation from two new unsymmetric phthalic-thioether-naphthalic dianhydride isomers which were synthesized from 3- or 4-chlorophthalic anhydride by a four-step procedure. The introduction of the unsymmetric phthalic...
1-Fluoro-4-nitrobenzene (98%), 4-chloro-1-nitro-3-(trifluoromethyl)benzene (99%), 4,4′-oxydiphthalic anhydride (ODPA, 97%), (4,4′-hexafluoroisopropylidene)-diphthalic anhydride (6FDA, 98%), palladium on activated charcoal (Pd/C catalyst, 5%), 1-methyl-2-pyrrolidinone (NMP), p-...
Polyanhydrides are a preferred type of mucoadhesive polymer. Suitable polyanhydrides include poly (adipic anhydride) (“p[AA]”), polyfumaric anhydride, polysebacic anhydride, polymaleic anhydride, polymalic anhydride, polyphthalic anhydride, polyisophthalic anhydride, polyaspartic anhydride, polyterephthalic...
(TAPOB), was synthesized from phloroglucinol and 4-chloronitrobenzene, and it was successfully polymerized into soluble hyperbranched polyimides (HB PIs) with commercially available dianhydrides: 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 4,4′-oxydiphthalic anhydride (ODPA), and 3,...
For example, when consumers first put detergent composition and clothes in the washing machine prior to the addition of water in the tub, significant residue is left in the tub or on the clothes. This residue is formed as the machine is filling with water, since the detergent is trapped in...
new diamine (TPCPPDA) bearing tetraphenylcyclopentadienone (TPCP) chromophore with 4,4 '-(hexafluoroisopropylidene) diphthalic anhydride (6FDA). The resulted TPCPPPI showed a cutoff wavelength (lambda cut) of 627 nm and Commission International de l'Eclairag LAB (CIE-LAB) parameter L* of 5.73...
These ICs were reacted with 4,4′-hexafluoroisopropylidenediphthalic anhydride (6FDA) in N, N-dimethylacetamide (DMAc) to form a polyamic acid intermediate, which imidized thermally to novel pseudopolyimiderotaxanes ( M w: 8400–31 100, contents of β-CDs: 4.3–11.2%). Polymers were ...
The present invention relates to a method for preparing a water-soluble metal phthalocyanine derivatives, including: (1) the use of phthalic anhydride - solid-phase synthesis of urea synthesis eight carboxy-metal phthalocyanine; (2) the carboxyl group of the eight metal phthalocyanine and ...
(DPDAPP) was successfully synthesised and polymerised with 4,4-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and diamine 2,2-bis[4-(4-aminophenoxy)phenyl]propane (BAPP) via the conventional two-step chemical imidisation method to produce a series of various alkyl-chain content polyimides...