Synthesis and research of basalt microfiber‐reinforced polyurethane elastomer composites

Abstract

Basalt microfiber‐reinforced polyurethane elastomer composites (BMF/PUE) were prepared by semi‐prepolymer method in this study. The degree of microphase separation and quantitative analysis of H‐bonding formation in polyurethane were determined by infrared spectroscopy. The fiber surface and the morphology at the tensile fracture interface of the composite materials were observed by scanning electron microscopy. The mechanical properties of composite materials were further measured on an electronic universal testing machine. Dynamic thermomechanical analysis and acoustic impedance tube were used to study the damping and acoustic properties of composite materials, respectively. The results indicated that the composite material prepared by adding 6 g of basalt microfibers treated with 3 min' crushing had the best overall performance. Compared with the matrix, BMF/PUE showed good sound insulation performance with a much wider effective damping temperature range. On the basis of ensuring its excellent overall performance, the mechanical properties were increased by 50.4% in tensile strength, 28.1% in elongation at break, and 14.2% in tear strength.

Preparation of laminated safety glass based on high strength polyurethane film by solution annealing

“…The excellent mechanical properties of polyurethane are attributed to their regulation of intermolecular hydrogen bonding, the crystallization of molecular segments and phase separation morphology. The results have verified that additives and molecular crosslinking structure have been considered as an effective way to improve the properties of polyurethane film 18–22 . As reported, the mechanical properties of aliphatic polyurethanes can be effectively improved by their denser H‐bonds formed from the uniform‐size hard segments (hexamethylene diisocyanate‐1,4‐Butanediol‐hexamethylene diisocyanate) 23–25 .…”

“…The results have verified that additives and molecular crosslinking structure have been considered as an effective way to improve the properties of polyurethane film. [18][19][20][21][22] As reported, the mechanical properties of aliphatic polyurethanes can be effectively improved by their denser H-bonds formed from the uniform-size hard segments (hexamethylene diisocyanate-1,4-Butanediol-hexamethylene diisocyanate). [23][24][25] Besides, the mechanical properties of polyurethane can be enhanced by molecular design at the expense of their sacrificial H-bonds.…”

Study on the Mechanical Properties and Energy Absorbing Capability of Polyurethane Microcellular Elastomers under Different Compressive Strain Rates

“…It can be clearly seen that the characteristic absorption peaks of -NCO at 2270 cm −1 and -NH at 3480 cm −1 disappeared, while the characteristic absorption peaks of -NH and -CO appeared near 3320 cm −1 and 1730 cm −1 , which indicates that -NCO reacted with -OH to form carbamate. PUMEs were successfully synthesized [ 24 ]. The observed frequency bands representing the peak vibrations are listed in Table 2 .…”

Study on the preparation and performance of SiC nanoparticle reinforced polyurethane coatings

“…7,8 The second is a physical method, which uses different reinforcing fillers to improve the mechanical properties of PU. [9][10][11] Nanoparticles are considered an ideal reinforcing filler due to their high strength, stiffness and "nano effect," 12 while a small addition has been shown to effectively improve the mechanical properties of PU. [13][14][15][16] Furthermore, nanoparticles can also significantly enhance the thermal stability of PU.…”

“…The first is a chemical method which utilizes polyisocyanates and polyols to either introduce high energy covalent bonds, or increase the density of non‐covalent bonds within PU structures 7,8 . The second is a physical method, which uses different reinforcing fillers to improve the mechanical properties of PU 9–11 . Nanoparticles are considered an ideal reinforcing filler due to their high strength, stiffness and “nano effect,” 12 while a small addition has been shown to effectively improve the mechanical properties of PU 13–16 .…”