生物基二酚酯环氧树脂的介电性能。

Dielectric Properties of Bio-Based Diphenolate Ester Epoxies.

机构信息

Department of Physics , Case Western Reserve University , 2076 Adelbert Road , Cleveland , Ohio 44106 , United States.

Department of Chemistry and Chemical Biology , Rensselaer Polytechnic Institute , Troy , New York 12180 , United States.

出版信息

ACS Appl Mater Interfaces. 2018 Apr 25;10(16):13924-13930. doi: 10.1021/acsami.7b19085. Epub 2018 Apr 16.

DOI:10.1021/acsami.7b19085

PMID:29620846

Abstract

Thermoset bio-based diglycidyl ether of diphenolate esters (DGEDP) exhibit comparable mechanical properties as petroleum-derived diglycidyl ether of bisphenol A (DGEBA), whereas DGEDP is derived from levulinic acid, a safe and readily renewable feedstock. To determine the potential replacement of DGEBA as dielectric materials, a series of DGEDP-esters (i.e., methyl, ethyl, propyl, and butyl esters) were synthesized and studied. Broadband dielectric spectroscopy revealed that DGEDP-propyl has the highest dielectric constant in the series, comparable to DGEBA. Differences in the dielectric properties of DGEDP-esters is attributed to the interplay of segmental, small local, and side-chain motions on one hand and free volume and steric hindrance on the other.

摘要

热固性生物基二酚二缩水甘油醚酯（DGEDP）表现出与石油衍生的双酚 A 二缩水甘油醚（DGEBA）相当的机械性能，而 DGEDP 则来源于安全且可再生的原料——乙酰丙酸。为了确定 DGEBA 作为介电材料的潜在替代品，合成并研究了一系列 DGEDP-酯（即甲酯、乙酯、丙酯和丁酯）。宽频介电谱表明，DGEDP-丙酯在该系列中具有最高的介电常数，与 DGEBA 相当。DGEDP-酯介电性能的差异归因于一方面的链段、小局部和侧链运动以及另一方面的自由体积和空间位阻的相互作用。