Gaina Constantin, Ursache Oana, Gaina Viorica, Serban Alexandru-Mihail, Asandulesa Mihai
"Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania.
Materials (Basel). 2023 Aug 16;16(16):5649. doi: 10.3390/ma16165649.
The paper presents the synthesis and thermal behavior of novel epoxy resins prepared from epoxidized castor oil in the presence of or without trimethylolpropane triglycidyl ether (TMP) crosslinked with 3-hexahydro-4-methylphtalic anhydride (MHHPA) and their comparison with a petroleum-based epoxy resin (MHHPA and TMP). Epoxidized castor oil (ECO) was obtained via in situ epoxidation of castor oil with peroxyacetic acid. The chemical structures of castor oil (CO), ECO, and epoxy matrix were confirmed using FT-IR and H-NMR spectroscopy. The morphological and thermal behavior of the resulting products have been investigated. Compared to petroleum-based resins, castor oil-based ones have a lower . Anyway, the introduction of TMP increases the of the resins containing ECO. The morphological behavior is not significantly influenced by using ECO or by adding TMP in the synthesis of resins. The dielectric properties of epoxy resins have been analyzed as a function of frequency (1 kHz-1 MHz) and temperature (-50 to 200 °C). The water absorption test showed that as increased, the percent mass of water ingress decreased.
本文介绍了由环氧化蓖麻油在有或没有三羟甲基丙烷三缩水甘油醚（TMP）存在的情况下制备的新型环氧树脂的合成及热行为，这些环氧树脂与3-六氢-4-甲基邻苯二甲酸酐（MHHPA）交联，并将其与石油基环氧树脂（MHHPA和TMP）进行比较。环氧化蓖麻油（ECO）是通过蓖麻油与过氧乙酸原位环氧化制得的。使用傅里叶变换红外光谱（FT-IR）和氢核磁共振光谱（H-NMR）对蓖麻油（CO）、ECO和环氧基体的化学结构进行了确认。对所得产物的形态和热行为进行了研究。与石油基树脂相比，蓖麻油基树脂具有较低的……无论如何，TMP的引入提高了含ECO树脂的……在树脂合成中使用ECO或添加TMP对形态行为没有显著影响。对环氧树脂的介电性能作为频率（1 kHz - 1 MHz）和温度（-50至200°C）的函数进行了分析。吸水试验表明，随着……增加，水进入的质量百分比降低。
