A hyperbranched polymer from tung oil for the modification of epoxy thermoset with simultaneous improvement in toughness and strength,New Journal of Chemistry

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A hyperbranched polymer from tung oil for the modification of epoxy thermoset with simultaneous improvement in toughness and strength
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-09-26 , DOI: 10.1039/c9nj06373k
Laihui Xiao _{1,

2,

2,

3,

4} , Zengshe Liu _{5,

6,

7,

8,

9} , Nan Li _{10,

11,

12,

13,

14} , Shuai Li _{1,

2,

2,

3,

4} , Pan Fu _{1,

2,

2,

3,

4} , Yigang Wang _{1,

2,

2,

3,

4} , Jinrui Huang _{1,

2,

2,

3,

4} , Jie Chen _{1,

2,

2,

3,

4} , Xiaoan Nie _{1,

2,

2,

3,

4}

Affiliation

In order to increase the toughness of epoxy resin and make full use of biological resources, a tung oil-based hyperbranched polymer (TOHBP) was synthesized. The structure of the TOHBP was determined by FTIR, NMR and gel permeation chromatography (GPC). After TOHBP was incorporated into an epoxy/polyetherdiamine curing system, different analytical studies were carried out to characterize samples of each formation. The results show simultaneous improvement in the impact strength (62.79 kJ m⁻²), tensile strength (73.01 MPa), modulus (3116 MPa) and glass transition temperature (T_g) (86.62 °C) compared with neat epoxy resin (20.07 kJ m⁻², 67.97 MPa, 2610 MPa and 81.48 °C, respectively). In addition, the significant improvement in impact strength and the simultaneous reinforcement of other properties suggest that TOHBP provides a better toughening and strengthening ability than many other reported oil-based hyperbranched polymers (HBPs) and petroleum-based polymers. The results indicate that this renewable material is a promising modifier, and may provide an alternative to replace petroleum-based materials that increase the toughness of epoxy resins.

中文翻译：

来自桐油的超支化聚合物，用于改性环氧热固性材料，同时提高韧性和强度

为了提高环氧树脂的韧性并充分利用生物资源，合成了基于桐油的超支化聚合物（TOHBP）。TOHBP的结构通过FTIR，NMR和凝胶渗透色谱法（GPC）确定。将TOHBP掺入环氧/聚醚二胺固化体系后，进行了各种分析研究以表征每种地层的样品。结果表明，与纯环氧树脂（20.07 kJ）相比，冲击强度（62.79 kJ m ^-2），拉伸强度（73.01 MPa），模量（3116 MPa）和玻璃化温度（T _g）（T _g）（86.62°C）同时提高。 m ^-2，分别为67.97 MPa，2610 MPa和81.48°C）。此外，冲击强度的显着提高以及其他性能的同时增强表明，TOHBP比许多其他已报道的油基超支化聚合物（HBPs）和石油基聚合物具有更好的增韧和增强能力。结果表明，这种可再生材料是一种很有前途的改性剂，并且可以替代石油基材料，从而提高环氧树脂的韧性。

更新日期：2020-10-15

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