Improved mechanical properties and thermal degradation of low-temperature hydrogenated acrylonitrile butadiene rubber composites with poly(sodium methacrylate) nanowires

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 64110-64120 ◽  
Author(s):  
Jihua Zhang ◽  
Mingjie Liu ◽  
Shutao Wang

Complex phase structures including a lot of poly(sodium methacrylate) nanowires improved the mechanical properties and thermal stability of LTG-HNBR composites.

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1105 ◽  
Author(s):  
Palin ◽  
Rombolà ◽  
Milanesio ◽  
Boccaleri

Plasticized–Poly(vinyl chloride) (P-PVC) for cables and insulation requires performances related to outdoor, indoor and submarine contexts and reduction of noxious release of HCl-containing fumes in case of thermal degradation or fire. Introducing suitable nanomaterials in polymer-based nanocomposites can be an answer to this clue. In this work, an industry-compliant cable-grade P-PVC formulation was added with nanostructured materials belonging to the family of Polyhedral Oligomeric Silsesquioxane (POSS). The effects of the nanomaterials, alone and in synergy with HCl scavenging agents as zeolites and hydrotalcites, on the thermal stability and HCl evolution of P-PVC were deeply investigated by thermogravimetric analysis and reference ASTM methods. Moreover, hardness and mechanical properties were studied in order to highlight the effects of these additives in the perspective of final industrial uses. The data demonstrated relevant improvements in the thermal stability of the samples added with nanomaterials, already with concentrations of POSS down to 0.31 phr and interesting additive effects of POSS with zeolites and hydrotalcites for HCl release reduction without losing mechanical performances.


Minerals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1388
Author(s):  
Kenan Zhang ◽  
Hao Zhang ◽  
Linsong Liu ◽  
Yongjie Yang ◽  
Lihui Liu ◽  
...  

The aim of this work was to investigate the dispersibility of kaolinite-rich coal gangue in rubber matrix, the mechanical properties and thermal stability of coal gangue/styrene butadiene rubber (SBR) composites, and to compare these properties to those of the same coal gangue but had undergone thermal activation and modification. Several experimental techniques, such as X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric-differential scanning calorimetry (TG-DSC), laser-scattering particle analyzer were adopted to characterize the coal gangue particles and then the obtained composites. The results demonstrated the raw coal gangue (RCG) was mainly composed of kaolinite. Calcination led to amorphization of thermal activated coal gangue (ACG), increased hydrophilicity and void volume, and decreased pH. The grain size of ACG became coarser than RCG, but ACG turned loose confirmed by higher degree of refinement after grinding. Modification enhanced the hydrophobicity of the coal gangue and improved its dispersibility than fillers without modification. Calcined samples had better dispersibility than uncalcined fillers. Additionally, the coal gangue treated by calcinating, grinding and modifying (MGA) had the best dispersion in rubber matrix. Either calcination or modification could improve the mechanical properties and thermal stability of coal gangue filled rubber, while the performance of MGA reinforced SBR (MGA-SBR) was the best. The enhanced performance of the MGA-SBR was owed to better dispersion of particles as well as stronger interactions between particles and rubber macromolecules.


2015 ◽  
Vol 354 (1) ◽  
pp. 145-154 ◽  
Author(s):  
Sudsiri Hemsri ◽  
Chanchai Thongpin ◽  
Narongsuk Moradokpermpoon ◽  
Pitchayapa Niramon ◽  
Mukrawee Suppaso

2019 ◽  
Vol 943 ◽  
pp. 100-104 ◽  
Author(s):  
Methus Charoenchai ◽  
Siree Tangbunsuk ◽  
Wirunya Keawwattana

In this study, graphene nanoplatelets C750 (GnPs-C750) was introduced to silica-filled natural rubber composites (NR/SiO2/GnPs) by simple latex mixing process and coagulation following conventional vulcanization process to investigate the outstanding properties compared to individuals. The SiO2 and GnPs contents were fixed at 40 and 2 parts per hundred of rubber (phr), respectively. The results showed that in the presence of GnPs in SiO2-filled natural rubber composites, the thermal stability of the composite was improved. Meanwhile, the rheological properties including minimum torque and maximum torque were increased and cure characteristics including scorch time and optimum cure time were decreased related to cure rate index was greater than SiO2 individual. The influence of GnPs on the mechanical properties was investigated. The results showed that it was not significantly changed in mechanical properties.


Sign in / Sign up

Export Citation Format

Share Document