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Mechanical and thermal properties of synergistic modification of bismaleimide polymer composites with nano-SiO2 and hyperbranched polyimide
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-09 , DOI: 10.1002/pc.26783 Feng Gao 1 , Jiahao Shi 2 , Xiaorui Zhang 1, 2 , Xuan Wang 2 , Ling Weng 1, 2 , Xue Sun 1 , Lida Yu 1 , Chenhao Li 1
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-09 , DOI: 10.1002/pc.26783 Feng Gao 1 , Jiahao Shi 2 , Xiaorui Zhang 1, 2 , Xuan Wang 2 , Ling Weng 1, 2 , Xue Sun 1 , Lida Yu 1 , Chenhao Li 1
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Bismaleimide resin (BMI) is a thermosetting resin with excellent properties. However, due to its poor toughness as a cured product, this paper uses hyperbranched polyimide (HBPI) and nano-SiO2 in a synergistic manner to improve the performance of BMI. Isophorone diisocyanated tripolymer (IPDI trimer) and methyl nadic anhydride (MNA) were used to synthesize HBPI, and then we investigated the effect of the synergistic modification on the mechanical and thermal properties and the modification mechanism of HBPI and nano-SiO2. The experiments showed that the most significant improvements were achieved at the addition of 40 and 3 wt% of HBPI and nano-SiO2 respectively, with the impact strength of the materials increasing by 97.2%, fracture toughness indexes GIC and KIC increased by 36.7% and 34.6% respectively and glass transition temperature (Tg) was reduced. The SEM results showed that the nanoparticles were uniformly dispersed and further validated the synergistic modification mechanism.
中文翻译：
纳米SiO2与超支化聚酰亚胺协同改性双马来酰亚胺聚合物复合材料的力学和热学性能
双马来酰亚胺树脂（BMI）是一种性能优良的热固性树脂。然而，由于其作为固化物的韧性较差，本文将超支化聚酰亚胺（HBPI）和纳米SiO 2以协同方式使用以提高BMI的性能。以异佛尔酮二异氰化三聚体（IPDI三聚体）和甲基萘二甲酸酐（MNA）合成HBPI，研究了协同改性对HBPI和纳米SiO 2力学性能和热性能的影响以及改性机理。实验表明，HBPI和纳米SiO 2分别添加40 wt%和3 wt%时，材料的冲击强度提高了97.2%，断裂韧性指标GIC和 K IC分别提高了 36.7% 和34.6 %，玻璃化转变温度 ( Tg ) 降低了。SEM结果表明纳米粒子分散均匀，进一步验证了协同改性机制。
更新日期：2022-06-09
中文翻译：
纳米SiO2与超支化聚酰亚胺协同改性双马来酰亚胺聚合物复合材料的力学和热学性能
双马来酰亚胺树脂（BMI）是一种性能优良的热固性树脂。然而，由于其作为固化物的韧性较差，本文将超支化聚酰亚胺（HBPI）和纳米SiO 2以协同方式使用以提高BMI的性能。以异佛尔酮二异氰化三聚体（IPDI三聚体）和甲基萘二甲酸酐（MNA）合成HBPI，研究了协同改性对HBPI和纳米SiO 2力学性能和热性能的影响以及改性机理。实验表明，HBPI和纳米SiO 2分别添加40 wt%和3 wt%时，材料的冲击强度提高了97.2%，断裂韧性指标GIC和 K IC分别提高了 36.7% 和34.6 %，玻璃化转变温度 ( Tg ) 降低了。SEM结果表明纳米粒子分散均匀，进一步验证了协同改性机制。
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