具有增强玻璃过渡温度的环氧玻璃体的设计,合成和表征
Chunai Dai1, Yang Shi1, Zhen Li2
1School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China.
Polymers
|November 25, 2023
概括
新的环氧玻璃 (EV) 显示了高达143°C的玻璃过渡温度 (Tg). 一种配方,EV-5.5,具有出色的热稳定性和机械性能,可在苛刻的环境中应用.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 有机合成 有机合成
背景情况:
- 环氧树脂是多功能热,但它们的应用受到热和机械性能的限制.
- 玻璃材料提供一种独特的热性质和再加工能力的组合.
- 开发具有可调节玻璃过渡温度的环氧玻璃制剂对于先进的材料设计至关重要.
研究的目的:
- 为了合成具有高玻璃过渡温度 (Tg) 的环氧玻璃制剂 (EVs).
- 研究固化剂成分对合成EVs的特性的影响.
- 为了评估一个领先的EV配方的热稳定性,机械性能和应力放松行为.
主要方法:
- 使用环氧树脂E51,甲氧化物,脂酸和转催化剂合成环氧玻璃剂.
- 固化动态的表征,质性质,机械性质 (拉伸强度) 和热稳定性 (分解温度).
- 在高温下对应力放松行为的分析以及与阿雷尼乌斯方程的相关性.
主要成果:
- 具有Tg范围从79°C到143°C的环氧玻璃制剂通过改变甲酸与脂酸的比率来成功合成.
- 该EV-5.5配方表现出高可用的Tg为98°C,在160-200°C时通过转化显著放松应力,并且具有52MPa的拉伸强度的弹性表现.
- EV-5.5具有良好的热稳定性,分解温度 (Td5) 为322°C.
结论:
- 调整固化剂的比率可以有效调整环氧玻璃的Tg.
- 合成的环氧玻璃,特别是EV-5.5,具有高Tg,机械强度和热稳定性的有希望的组合.
- 这些发现为在特殊环境条件下利用耐热环氧树脂开辟了新的途径.
关键词:
固化剂是一种固化剂.环氧树脂 E51 的使用.环氧玻璃玻璃化剂 环氧玻璃化剂玻璃过渡温度是玻璃过渡温度.甲化 (phthalic anhydride) 是一种含有甲的化合物.油脂酸是什么意思 油脂酸是什么意思更多相关视频
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