Nanostructured epoxy thermoset templated by an amphiphilic PCL-b-PES-b-PCL triblock copolymer

作者：Xu, Qilei; Zhou, Quan^*; Shen, Kang; Jiang, Deyi; Ni, Lizhong

来源：Journal of Polymer Science Part B: Polymer Physics , 2016, 54(3): 424-432.

DOI：10.1002/polb.23917

• block copolymers
• epoxy resin
• nanocomposites
• nanostructures
• reaction-induced microphase separation
• resins

The PCL-b-PES-b-PCL triblock copolymer is used to incorporate into epoxy resin when the blends are cured with 4,4'-diaminodiphenylsulfone (DDS) to afford the nanostructured epoxy thermosets. The differential scanning calorimetry (DSC) and Fourier transform-infrared spectroscopy (FT-IR) show that the nanostructured PCL-b-PES-b-PCL thermosets are accessed through the formation of the intermolecular hydrogen bonding interactions. The nanostructures are further evidenced by means of small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). By considering the miscibility of the subchains of block copolymer with epoxy before and after the curing reaction, it is judged that the formation of the nanostructures follows the mechanism of reaction-induced microphase separation. It is noted that the epoxy resin is significantly toughened in terms of the measurement of critical stress field intensity factor (K-IC).

• 出版日期2016-2-1
• 单位华东理工大学