热固性聚合物
呋喃
环氧树脂
玻璃化转变
单体
固化(化学)
胺气处理
材料科学
烧焦
胶粘剂
高分子化学
化学工程
化学
复合材料
有机化学
聚合物
热解
工程类
图层(电子)
作者
Fengshuo Hu,Santosh Kumar Yadav,John J. La Scala,Joshua M. Sadler,Giuseppe R. Palmese
标识
DOI:10.1002/macp.201500142
摘要
Fully furan‐based epoxy/amine thermosetting materials are prepared and investigated using a furanyl epoxy monomer, 2,5‐bis[(2‐oxiranylmethoxy)methyl]‐furan (BOF), and two furanyl amine hardeners, 5,5′‐methylenedifurfurylamine (DFDA) and 5,5′‐ethylidenedifurfirylamine (CH 3 ‐DFDA). These furan‐based thermosets have shown promising glass transition temperatures (62 and 69 °C, respectively, using tan delta) and room temperature storage moduli (≈3.5 GPa). The BOF/CH 3 ‐DFDA sample is exhibited higher T g than the BOF/DFDA system due to the presence of an additional methyl group in CH 3 ‐DFDA. Used as curing agents for DGEBA, DFDA and CH 3 ‐DFDA have shown excellent performance with resulting T g s well above 120 °C. Onset degradation temperature of the fully furan‐based samples is observed around 270 °C with high char yields (≈40 wt%) at 750 °C in argon. Based on their thermal and mechanical properties, the renewable fully furan‐based thermosets are found suitable for coating, adhesive, and composite applications, and are therefore potential replacements for incumbent systems. image
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