Electric Literature of 18959-30-3, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 18959-30-3, Name is 4,5-Difluorophthalic Anhydride,introducing its new discovery.
Aryl ethynyl terminated imide oligomers and their cured polymers
As part of a program to develop resins for high-performance/high-temperature aerospace structural applications, preliminary neat resin properties of naphthylethynyl terminated imide oligomers were determined and compared with the corresponding phenylethynyl terminated imide oligomers. Prior to oligomer work, four naphthylethynyl and phenylethynyl phthalimide and four naphthylethynyl and phenylethynyl naphthalimide model compounds were prepared and their thermal properties compared. The naphthylethynyl end-caps in N-phenyl- or N-naphthylphthalimide model compounds reacted at a lower temperature than the phenylethynyl end-cap in the same compounds, as previously reported. In contrast to these results, replacement of the phthalimide groups with naphthalimide groups showed that the phenylethynyl end-cap reacted at a lower temperature than the naphthylethynyl end-cap. Four aryl ethynyl terminated imide oligomers having the same imide backbone and molecular weight but different terminal units were prepared and the properties of the cured polymers compared. Phenylethynyl end-capped or naphthylethynyl end-capped oligomers, cured at 340 or 371C, exhibited similar tensile properties in thin films. The chemistry and properties of these materials are presented.
We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 18959-30-3, and how the biochemistry of the body works.Electric Literature of 18959-30-3
Reference£º
Benzofuran – Wikipedia,
Benzofuran | C8H2969O – PubChem