Preparation and properties of epoxy POSS modified epoxy resin

doi:10.11949/0438-1157.20191584

Abstract

Abstract:

With phenyltriethoxysilane (PTES) and β-3,4-cyclohexyl epoxy silane preparation oxygen radicals (A186) as raw material, mixing methanol and ethanol as solvents, the reaction is carried out under acidic conditions to prepare compounds with Si—H bonds called epoxy oligosilsesquioxane(EP-POSS). The structures of the compounds were characterized by Fourier transform infrared (FT-IR), nuclear magnetic resonance (¹H NMR), and nuclear magnetic resonance (²⁹Si NMR). The epoxy resin was modified with the prepared EP-POSS, and the influence of the amount of EP-POSS on the adhesion, impact resistance, hydrophobicity and heat resistance of the resin coating was analyzed. The results showed that when the amount of EP-POSS is 5%, the adhesion of the epoxy resin coating reached grade 1, the impact resistance reached 50 cm, the contact angle to water is 90°, and the thermal stability is greatly improved.

Key words: epoxy POSS, modified epoxy resin, coating adhesion, heat stability, hydrophobic

摘要：

以苯基三乙氧基硅烷(PTES)和β-3,4-环氧环己基乙基三甲氧基硅烷(A186)为原料，甲醇、乙醇混合溶液为溶剂，酸性条件下水解制得含有Si—H键的环氧基低聚倍半硅氧烷(EP-POSS)，通过傅里叶红外光谱(FT-IR)、核磁共振氢谱(¹H NMR)、核磁共振硅谱(²⁹Si NMR)等手段对其结构进行表征。用制备的EP-POSS对环氧树脂进行改性，分析了EP-POSS用量对树脂涂层附着力、耐冲击性、疏水性、耐热稳定性的影响。结果表明：当EP-POSS加入量为5%时，环氧树脂涂层附着力达到1级，耐冲击性达到50 cm，对水的接触角为90°，热稳定性大幅提升。

关键词: 环氧基POSS, 改性环氧树脂, 涂层附着力, 热稳定性, 疏水性

CLC Number:

TQ 264.1

Jing JIN, Qiufeng AN, Bowen YANG, Shuyuan SHI, Huapeng TIAN. Preparation and properties of epoxy POSS modified epoxy resin[J]. CIESC Journal, 2020, 71(5): 2432-2439.

金晶, 安秋凤, 杨博文, 史书源, 田华鹏. 环氧基POSS改性环氧树脂的研制与性能研究[J]. 化工学报, 2020, 71(5): 2432-2439.

Figures/Tables 11

Fig.1 Preparation of epoxy POSS

Fig.2 Sample preparation process diagram

Fig.3 Infrared spectrum of EP-POSS

Fig.4 Nuclear magnetic hydrogen spectrum of EP-POSS

Fig.5 29Si NMR of EP-POSS

Fig.6 TGA curves of composites with different POSS contents

Fig.7 AFM diagram of EP-POSS modified epoxy coating

Fig.8 SEM images of samples

Fig.9 Comparison of contact angles without and with POSS

Fig.10 Effect of EP-POSS dosage on adhesion of coatings

Fig.11 Effect of EP-POSS dosage on mechanical properties of coatings

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