In:
Polymers for Advanced Technologies, Wiley, Vol. 33, No. 8 ( 2022-08), p. 2459-2469
Abstract:
The surface of reactive nano‐silica coated with a silage coupling agent containing the epoxy group (denoted as E‐SiO 2 ) and dimer fatty acids (DFA) were allowed to participate in the in‐situ polycondensation reaction of unsaturated polyester resin (UPR), thus obtaining E‐SiO 2 /DFA/UPR hybrid material. Fourier transform infrared spectrometer, scanning electron microscope, and X‐ray energy dispersive spectrometer were used to analyze the structure of the material, morphology of tensile section, and the element composition of the section. It was found that E‐SiO 2 grafted onto the DFA/UPR backbone by chemical bonds, and the material exhibited ductile fracture with Si element on the fracture surface. Thermogravimetric analysis, differential scanning calorimetry, stress–strain test, tensile test, bending test, hardness test, and water resistance test, the influence of the content of E‐SiO 2 on the thermal stability, mechanical properties, and water resistance of the materials was studied. The results show that E‐SiO 2 has a good reinforcing and toughening effect for the in‐situ polymerized E‐SiO 2 /DFA/UPR composite due to the chemical reaction between the epoxy group of E‐SiO 2 and the hydroxyl group (carboxyl group) of DFA/UPR. A heterogeneous network structure was formed in the cured E‐SiO 2 /DFA/UPR composites. The mechanical properties and thermal properties of E‐SiO 2 nanocomposites were improved. When 0.8 wt% E‐SiO 2 was added, the tensile strength, Young's modulus, flexural strength, flexural stress, elongation at break, and Shore A hardness increased by 37.03%, 69.18%, 86.81%, 86.80%, 14.0%, and 14.71%, respectively, compared to DFA/UPR. At the same time, the addition of E‐SiO 2 also improved the water resistance of hybrid materials.
Type of Medium:
Online Resource
ISSN:
1042-7147
,
1099-1581
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
1481102-9
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