634585-36-7

Upstream product

• 583-71-1 4-bromo-o-xylene 
• 18057-66-4 bis(3,4-dimethylphenyl)dimethylsilane 
• 42297-18-7 bis(3,4-dicarboxyphenyl)dimethylsilane dianhydride 
• 42297-17-6 4,4'-(dimethylsilanediyl)diphthalic acid 
• 634585-35-6 N,N'-(4,4'-dimethylsilylenediphthaloyl)bis-4-benzoic diacid 

Relevant academic research and scientific papers

Blue light-emitting polyamide and poly(amide-imide)s containing 1,3,4-oxadiazole ring in the side chain

A new diamine monomer containing a 1,3,4-oxadiazole ring, 4,4′-diamino-4″-[2-(4-phenoxy)-5-(4-dimethylaminophenyl)-1,3,4-oxadiazole]triphenylmethane, was synthesized and characterized. The diamine is used to prepare novel polyamide and poly(amide-imide)s

Synthesis and properties of new poly(imide-amide)s

New aromatic poly(imide-amide)s have been synthesized by solution polycondensation of various aromatic diamines with diacid chlorides containing dimethylsillane or hexafluoroisopropylidene units. These polymers are easily soluble in polar amidic solvents such as N-methylpyrrolidinone (NMP) or dimethylformamide (DMF) and can be cast into thin flexible films or coatings from such solutions. They show high thermal stability, with initial decomposition temperature above 400°C and glass transition temperature in the range of 265-324°C. Very thin polymer films deposited by the spin-coating technique onto silicon wafers showed a smooth, pinhole-free surface in Atomic Force Microscopy investigations.