In situ polymerization, thermal, damping, and mechanical properties of multiwalled carbon nanotubes/polyisobutylene‐based polyurethane nanocomposites

Abstract

Despite the development of strong, durable, and cost efficient polyisobutylene-based polyurethane (PIBbased PU) materials has yet to be achieved. The well dispersion and maximum interfacial interaction between the nanofiller and the PIB-based PU at low loading have been scarcely studied. Here, the preparation of PIB-based PU nanocomposites with Multiwalled carbon nanotubes (MWCNTs) using a simple in situ polymerization method is reported. The thermogravimetric analysis tests show that MWCNTs significantly improved the thermal stability of MWCNTs/PIB-based PU nanocomposites. Compare to the pure PIB-based PU the onset temperature of degradation for the nanocomposite was about 20 C higher at 0.7 wt% MWCNTs loading. Efficient load transfer is found between the nanofiller MWCNTs and PIB-based PU and the mechanical properties of the MWCNTs/PIB-based PU nanocomposite with well dispersion are improved. A 63% improvement of Young's modulus and slightly increased of tensile strength are achieved by addition of only 0.7 wt% of MWCNTs. The experimentally determined Young's modulus is in well agreement with the theoretical simulation. It is worth noting that the PIBbased PU and MWCNTs/PIB-based PU nanocomposites exhibit excellent damping properties (tan d > 0.3) from 245 C to 8 C. POLYM. COMPOS.,

Effects of multiwall carbon nanotube and perfluoroalkane additives on the sound absorption properties of flexible polyurethane foams

“…The use of organoclay lead to the cell size reduction, however, uneven dispersion of the organoclay in the polyol solution was observed. While the incorporation of carbon nanotubes or graphenes in PUF has shown to improve its thermal, electrical, and mechanical properties , studies on their influence on acoustic damping properties are limited . A few studies reported the acoustic damping properties of PUF without correlation to its airflow resistivity.…”

Cyclic compression behavior and energy dissipation of aluminum foam–polyurethane interpenetrating phase composites

“…Therefore, the mechanical parameters affecting the performance of AF and PU, respectively, also affect the mechanical behavior and structural stability of AF-PU composites. Different relative densities and pore size are two main factors influencing mechanical behavior of AF [13][14][15][16][17][18][19] and the usual influence parameters on the absorbed mechanical energy of PU are frequency, temperature and vibration amplitude [20][21][22][23][24]. In order to understand what kind of AF-PU materials are the most suitable for applying hysteretic damping devices in seismic resistant buildings, we will investigate the damping capacity of AF-PU composites with different corresponding porosity and pore size under different cycling frequency, vibration amplitude, temperature aging and cycle numbers.…”

Modeling of nonlinear hyper‐viscoelastic and stress softening behaviors of acrylonitrile butadiene rubber/polyvinyl chloride nanocomposites reinforced by nanoclay and graphene

“…In various literature, several methods have been reported for the preparation of rubber‐based nanocomposites that include melt intercalation, [ 21 ] solution mixing, [ 22 ] and in situ polymerization. [ 23 ] The melt intercalation method due to the more direct, cost‐effective, environmentally friendly, and more industrially, has been greater used than other methods. In this method, the polymer is heated with the nanoparticles upstream of the polymer softening point and the nanoparticles are sheared into smaller ones.…”