Role of π‐π interactions and chain flexibility in dispersion and dynamic‐mechanical properties of nanocomposites with multiple wall carbon nanotubes

2019 ◽  
Vol 136 (45) ◽  
pp. 48195 ◽  
Author(s):  
Michele Regina Rosa Hamester ◽  
Carla Dalmolin ◽  
Daniela Becker
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Dynamic Mechanical Properties ◽  
Chain Flexibility ◽  
Dynamic Mechanical ◽  
Π Interactions

Dynamic Mechanical Properties and Thermal Stability of PTT/POE/OMMT Nanocomposites

2011 ◽  
Vol 366 ◽  
pp. 306-309
Author(s):  
Ming Tao Run ◽  
Na Li ◽  
Bing Tao Xing ◽  
Meng Yao ◽  
Wen Zhou
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Dynamic Mechanical Properties ◽  
Thermal Gravimetric ◽  
Dynamic Mechanical ◽  
Thermal Gravimetric Analyzer ◽  
Transmission Electron ◽  
Reinforcing Agent ◽  
Thermal Stability Of

The dynamic mechanical properties, phase morphology and thermal stability of the poly(trimethylene terephthalate)/maleinized poly(octene-ethylene)/organo-montmorillonite nanocomposites (PTT/POE/OMMT) were investigated by using the thermodynamic mechanical analyzer (DMA), transmission electron microscopy (TEM) and thermal gravimetric analyzer (TGA), respectively. The results suggest that the modulus of elasticity of the PTT/POE/OMMT nanocomposite increases, and the glass transition temperature first slightly decreases and then increases with increasing OMMT content because that the TPP plays the role of plasticizer and OMMT plays the role of reinforcing agent. OMMT disperse evenly in the polymer matrix with most of the strip-like sheet morphology. The addition of the OMMT does not apparently affect the thermal stability of the PTT/POE/OMMT nanocomposite.

scholarly journals Dynamic mechanical properties of cementitious composites with carbon nanotubes

2020 ◽  
Vol 22 ◽  
pp. 100722
Author(s):  
Jialiang Wang ◽  
Sufen Dong ◽  
Ashraf Ashour ◽  
Xinyue Wang ◽  
Baoguo Han
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Dynamic Mechanical Properties ◽  
Cementitious Composites ◽  
Dynamic Mechanical

Study of crosslink structure and dynamic mechanical properties of magnetorheological elastomer: Effect of vulcanization system

2019 ◽  
Vol 30 (8) ◽  
pp. 1189-1199 ◽  
Author(s):  
Guanxin Shi ◽  
Wenju Wang ◽  
Huanglei Lu ◽  
Guoping Wang ◽  
Fufeng Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Smart Materials ◽  
Crosslink Density ◽  
Magnetic Particles ◽  
Dynamic Mechanical Properties ◽  
Zero Field ◽  
Magnetorheological Elastomer ◽  
Dynamic Mechanical ◽  
Particle Chains

Magnetorheological elastomers are a kind of intelligent and smart materials which are mainly composed of rubbery polymers and soft magnetic particles. The role of various vulcanization systems on the crosslink structures, curing properties, and dynamic mechanical properties of natural rubber–based magnetorheological elastomer was investigated. Conventional, semi-efficient, and efficient vulcanization systems were used and compared. It was found that the content of polysulfide linkages decreased and the monosulfide linkages increased when the vulcanization system was changed from conventional to semi-efficient and efficient vulcanization systems, respectively. The crosslink density has the same tendency with the content of polysulfide linkages. In all vulcanization systems, the zero-field modulus, magnetic-induced modulus, controllability of damping, and the degree of the influence of Payne effect of the samples had an increasing trend when the crosslink density decreased. Evidence from micrographs of scanning electron microscope showed that this was because the particle chains in the low crosslink density composites were longer and more aligned. As the proportion of monosulfide linkages increased, the value of the loss factor increased and the modulus of the composites was more affected by the increasing frequency.

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