Safety of Diphenyl oxide. I found the field of Polymer Science very interesting. Saw the article Synthesis and properties of novel poly(ether ketone ketone)s containing 1,4-naphthylene units by electrophilic solution copolycondensation published in 2021.0, Reprint Addresses Cai, MZ (corresponding author), Jiangxi Normal Univ, Minist Educ, Key Lab Funct Small Organ Mol, Nanchang 330022, Jiangxi, Peoples R China.; Cai, MZ (corresponding author), Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Jiangxi, Peoples R China.. The CAS is 101-84-8. Through research, I have a further understanding and discovery of Diphenyl oxide.
Semicrystalline poly(aryl ether ketone)s (PAEKs) represent an industrially important class of high-performance engineering thermoplastics with excellent physicochemical and mechanical properties, and the synthesis of PAEKs with enhanced glass transition temperatures (T-g) and moderate melting temperatures (T-m) is highly desirable. In the work reported, novel poly(ether ketone ketone)s (PEKKs) containing 1,4-naphthylene units in main chains were synthesized by Friedel-Crafts solution copolycondensation of terephthaloyl chloride with a mixture of diphenyl ether and 1,4-di(4-phenoxybenzoyl)naphthalene (1,4-DPOBN). The polymerization proceeded smoothly in 1,2-dichloroethane in the presence of anhydrous AlCl3 and N-methylpyrrolidone under mild conditions and afforded polymers having inherent viscosities of 0.66-0.98 dL g(-1). The polymers with 5-30 mol% 1,4-DPOBN are semicrystalline and have obviously enhanced T-g over commercial poly(ether ether ketone)s and PEKKs due to the incorporation of rigid and bulky 1,4-naphthylene moieties into the main chain. The polymers with 20-30 mol% 1,4-DPOBN not only have high T-g of 175-177 degrees C, but also relatively low T-m of 331-336 degrees C, having high potential for melt processing. The polymers with 20-30 mol% 1,4-DPOBN also exhibit excellent thermal stability and good mechanical and solvent-resistance properties. (c) 2021 Society of Chemical Industry
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Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem