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Constructing nano SiO2-anchored hyperbranched polymer hybrid architectures for thermosetting epoxy systems with outstanding mechanical property
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-24 , DOI: 10.1002/pc.26841 Tingting Wang 1 , Li Yuan 1 , Guozheng Liang 1 , Aijuan Gu 1
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-24 , DOI: 10.1002/pc.26841 Tingting Wang 1 , Li Yuan 1 , Guozheng Liang 1 , Aijuan Gu 1
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A hybrid architecture system was developed via in situ formation of SiO2 nanoparticles in the cavities of COOH-terminated hyperbranched aromatic polyester (CHBPE). Results show that SiO2 nanoparticles can be successfully anchored in the cavities of CHBPE owing to the hyperbranched structure of CHBPE. The resulting CHBPE-SiO2 system is applied to epoxy (EP) resins using 4,4′-diaminodiphenyl sulfone (DDS) as curing agent. Because –COOH groups in CHBPE-SiO2 system can react with epoxy groups, the conversion of epoxy groups in EP/CHBPE-SiO2 systems can be improved, and the strong interface interaction between EP matrix and CHBPE-SiO2 can be realized. The resulting EP/CHBPE-SiO2 composites have excellent mechanical property. When the contents of CHBPE-SiO2 are 8%–20%, the impact strengths, the flexural strengths and the tensile strengths of EP/CHBPE-SiO2 composites can reach 24–46 kJ/m2, 121–165 MPa and 57–71 MPa, respectively, which are 16.1–31.9-fold, 4.0–5.9-fold and 8.9–11.3-fold higher than those of pure EP, respectively. EP/16%CHBPE-SiO2 composites have the optimal comprehensive mechanical property. The initial thermal decomposition temperature at 5 wt% weight loss (Tdi) and glass-transition temperature (Tg) of EP composites can increase by 70–84°C and 30–43°C, respectively, after introducing 8%–20% CHBPE-SiO2. Moreover, the dielectric constants of EP composites with 8%–20% CHBPE-SiO2 decrease by 3%–11% as compared to pure EP. The high dispersion of SiO2 in EP/CHBPE-SiO2 composite and the strong interface interaction between EP matrix and CHBPE-SiO2 can contribute to the outstanding comprehensive property of EP/CHBPE-SiO2 composite.
中文翻译：
为具有出色机械性能的热固性环氧树脂体系构建纳米 SiO2 锚定的超支化聚合物混合结构
通过在COOH 封端的超支化芳族聚酯 (CHBPE) 的空腔中原位形成 SiO 2纳米颗粒，开发了一种混合结构系统。结果表明，由于CHBPE的超支化结构，SiO 2纳米颗粒可以成功地锚定在CHBPE的空腔中。使用 4,4'-二氨基二苯砜 (DDS) 作为固化剂，将所得 CHBPE-SiO 2体系应用于环氧树脂 (EP) 树脂。由于CHBPE-SiO 2体系中的-COOH基团可以与环氧基团发生反应，可以提高EP/CHBPE-SiO 2体系中环氧基团的转化率，实现EP基体与CHBPE-SiO 2之间的强界面相互作用。所得 EP/CHBPE-SiO2复合材料具有优良的力学性能。当CHBPE-SiO 2含量为8%~20%时，EP/CHBPE-SiO 2复合材料的冲击强度、弯曲强度和拉伸强度可达24~46 kJ/m 2、121~165 MPa和57分别为–71 MPa，分别比纯EP高16.1-31.9倍、4.0-5.9倍和8.9-11.3倍。EP/16%CHBPE-SiO 2复合材料具有最佳的综合力学性能。EP 复合材料在 5 wt% 失重时的初始热分解温度 ( T di ) 和玻璃化转变温度 ( T g ) 在引入 8%–20 后可分别提高 70–84°C 和 30–43°C % CHBPE-SiO2 . 此外，与纯EP相比，添加8%~20% CHBPE-SiO 2的EP复合材料的介电常数降低了3%~11%。EP/CHBPE-SiO 2复合材料中SiO 2的高分散性和EP基体与CHBPE-SiO 2之间的强界面相互作用有助于EP/CHBPE-SiO 2复合材料具有优异的综合性能。
更新日期：2022-06-24
中文翻译：
为具有出色机械性能的热固性环氧树脂体系构建纳米 SiO2 锚定的超支化聚合物混合结构
通过在COOH 封端的超支化芳族聚酯 (CHBPE) 的空腔中原位形成 SiO 2纳米颗粒，开发了一种混合结构系统。结果表明，由于CHBPE的超支化结构，SiO 2纳米颗粒可以成功地锚定在CHBPE的空腔中。使用 4,4'-二氨基二苯砜 (DDS) 作为固化剂，将所得 CHBPE-SiO 2体系应用于环氧树脂 (EP) 树脂。由于CHBPE-SiO 2体系中的-COOH基团可以与环氧基团发生反应，可以提高EP/CHBPE-SiO 2体系中环氧基团的转化率，实现EP基体与CHBPE-SiO 2之间的强界面相互作用。所得 EP/CHBPE-SiO2复合材料具有优良的力学性能。当CHBPE-SiO 2含量为8%~20%时，EP/CHBPE-SiO 2复合材料的冲击强度、弯曲强度和拉伸强度可达24~46 kJ/m 2、121~165 MPa和57分别为–71 MPa，分别比纯EP高16.1-31.9倍、4.0-5.9倍和8.9-11.3倍。EP/16%CHBPE-SiO 2复合材料具有最佳的综合力学性能。EP 复合材料在 5 wt% 失重时的初始热分解温度 ( T di ) 和玻璃化转变温度 ( T g ) 在引入 8%–20 后可分别提高 70–84°C 和 30–43°C % CHBPE-SiO2 . 此外，与纯EP相比，添加8%~20% CHBPE-SiO 2的EP复合材料的介电常数降低了3%~11%。EP/CHBPE-SiO 2复合材料中SiO 2的高分散性和EP基体与CHBPE-SiO 2之间的强界面相互作用有助于EP/CHBPE-SiO 2复合材料具有优异的综合性能。
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