Academic Journal

Preparation of phosphinated bisphenol from acid-fragmentation of 1,1,1-tris(4-hydroxyphenyl)ethane and its application in high-performance cyanate esters.

التفاصيل البيبلوغرافية
العنوان: Preparation of phosphinated bisphenol from acid-fragmentation of 1,1,1-tris(4-hydroxyphenyl)ethane and its application in high-performance cyanate esters.
المؤلفون: Lin, Ching Hsuan1, Lin, Hung Tse1, Tian, Yu Wei1, Dai, Shenghong A.1, Su, Wen Chiung2
المصدر: Journal of Polymer Science. Part A, Polymer Chemistry. Nov2011, Vol. 49 Issue 22, p4851-4860. 10p.
مستخلص: We reveal a route for the preparation of phosphinated bisphenol, 1,1-bis(4-hydroxyphenyl)-1-(6-oxido-6H-dibenz <1,2> oxaphosphorin-6-yl)ethane (2), via a one-pot reaction of 1,1,1-tris(4-hydroxyphenyl)ethane and 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) in the catalysis of p-toluenesulfonic acid. A two-step reaction mechanism, acid-fragmentation of 1,1,1-tris(4-hydroxyphenyl)ethane followed by nucleophilic addition of DOPO, is proposed for the synthesis. Based on (2), a dicyanate ester derivative, 1,1-bis(4-cyanatophenyl)-1-(6-oxido-6H-dibenz <1,2> oxaphosphorin-6-yl)ethane (3) was prepared and co-cured with a commercially available dicyanate ester, the dicyanate ester of bisphenol A (BACY). Experimental data show that incorporating (3) into BACY enhances the flame retardancy and dielectric properties with little penalty to the thermal properties. A thermoset with Tg 274 °C, coefficient of thermal expansion (CTE) 49 ppm/°C, Dk 3.04 (1 GHz), Td (5%,) N2: 435 °C, air: 424 °C, and UL-94 V-0 rating can be achieved via this approach. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011. [ABSTRACT FROM AUTHOR]
قاعدة البيانات: Academic Search Index
الوصف
تدمد:0887624X
DOI:10.1002/pola.24936