Synthesis, structure, and properties of segmented carborane‐containing polyurethanes

Abstract

Novel segmented carborane-containing polyurethane (PUR 2-5) is synthesized from hydroxyl-terminated carborane-containing prepolymer (P3) as soft segment and isocyanate-terminated carborane-containing prepolymer (P5) as hard segment by different ratio of P3 and P5. The prepared carborane-containing polyarylesters and polyurethanes (PURs) are characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (NMR). Their mechanical properties and thermal stability are measured, while the dosage of carborane biphenol is 5-10 wt %, the tensile strength is up to 20 MPa, and thermal gravimetric analyzer (TGA) curves indicate that the carborane group effectively reduces the degradation rate of carborane-containing polyurethane, which is fairly stable above 300 C and with char yield exceeding 40%.

HighTgand Thermo‐Oxidatively Stable Thermosetting Polyimides Derived from a Carborane‐Containing Diamine

“…Polymers with carboranes as building blocks, such as polyurethanes, polythiophenyls, polysiloxanes, and polyimides, are getting some attention due to their good solubility, thermal and thermo‐oxidative stability, and high T g . For example, Huang et al.…”

Graphene and poly(ionic liquid) modified polyurethane sponges with enhanced flame‐retardant properties

“…With such an LOI value, the PU-PIL-Gr samples were able to compete with reported PU materials. 38,39 Clearly, the introduction of PIL and Gr into the sponge framework efficiently enhanced the LOI of the resulting modified sponges.…”

Synthesis and characterization of carborane‐containing polyester with excellent thermal and ultrahigh char yield

“…Owing to these distinctive properties, carboranes have been regarded as one of the most excellent organic groups to improve performance of organic polymers with remarkable thermal stability . Therefore, carboranes were incorporated into many traditional polymers to improve their thermal stability including epoxy resins, phenolic resins, polyurethanes, organic silicone polymers, benzoxazine resins, polyimides, and so forth.…”

“…Carborane groups also can be introduced into polyesters to improve the thermal stability of the polyesters. Decades ago, several research groups have prepared the carborane‐containing polyester with different molecular weight . However, few research works about carborane‐containing polyester have been reported in recent years.…”