scholarly journals Enhance Thermoelectric and Mechanical Properties of Thermoplastic Vulcanizates (TPVs) by Constructing Nanosheet Network of Hydroxylated Graphene

2021 ◽  
Author(s):  
Qi Tang ◽  
Lan Cao ◽  
Xiurui Lang ◽  
Yingxia Zong ◽  
Chengzhong Zong
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Maleic Anhydride ◽  
Interfacial Interaction ◽  
Interface Bonding ◽  
Dynamic Vulcanization ◽  
Strong Interfacial Interaction ◽  
Rubber Particles ◽  
Thermoplastic Vulcanizates ◽  
Vulcanization Process

In order to obtain higher thermoelectric and mechanical properties in non-polar thermoplastic vulcanizates (TPVs), the Butyl rubber/Polypropylene (TPVs)/hydroxylated graphene (HGE) composites with nanosheet network were prepared through masterbatch technique and based on thermodynamic calculations, using polypropylene-graft-maleic anhydride (PP-MA) as a compatibilizer. The FTIR and Raman spectra revealed the introduced maleic anhydride group on PP-MA can form strong interfacial interaction with hydroxyl-containing functional groups on HGE. Morphology study indicated the rubber particles in the composites occupied the most volume of the PP phase, as expected to hinder the aggregation of HGE and form the effective nanosheet network. The nanosheet network can be combined with the IIR cross-linked particles during the dynamic vulcanization process to improve the interface bonding between PP and IIR, thus increasing the tensile strength of TPVs. When the content of HGE reached the percolation threshold (2 wt.%), the nanosheet network of HGE was formed, and the AC conductivity, dielectric permittivity and thermal conductivity increased sharply. The prepared TPVs/HGE nanocomposites have significantly improved in mechanical properties, thermal properties and dielectric properties, which provides a guarantee for their potential application as multifunctional TPVs polymers.

Enhancement of thermoelectric and mechanical properties of thermoplastic vulcanizates (TPVs) with hydroxylated graphene by dynamic vulcanization

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Qi Tang ◽  
Lan Cao ◽  
Xiurui Lang ◽  
Yingxia Zong ◽  
Chengzhong Zong
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Interfacial Interaction ◽  
Butyl Rubber ◽  
Interface Bonding ◽  
Dynamic Vulcanization ◽  
Strong Interfacial Interaction ◽  
Thermoplastic Vulcanizates ◽  
The Fourier Transform ◽  
Vulcanization Process

Abstract In order to obtain higher thermoelectric and mechanical properties in nonpolar thermoplastic vulcanizates (TPVs), the butyl rubber/polypropylene (TPVs)/hydroxylated graphene (HGE) composites with nanosheet network were prepared through masterbatch technique and based on thermodynamic calculations, using polypropylene-graft-maleic anhydride (PP-MA) as a compatibilizer. The Fourier transform infrared (FTIR) and Raman spectra revealed the introduced maleic anhydride group on PP-MA can form strong interfacial interaction with hydroxyl-containing functional groups on HGE. Morphology study indicated the rubber particles in the composites occupied the most volume of the PP phase, as expected to hinder the aggregation of HGE and form the effective nanosheet network. The nanosheet network can be combined with the butyl rubber (IIR) cross-linked particles during the dynamic vulcanization process to improve the interface bonding between PP and IIR, thus increasing the tensile strength of TPVs. The prepared TPVs/HGE composites have significantly improved in mechanical properties, thermal properties and dielectric properties, which provides a guarantee for their potential application as multifunctional TPVs polymers.

The different effect of reduced graphene oxide and graphene oxide on the performance of chitosan by using homogenous fillers

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34153-34158 ◽  
Author(s):  
Tiannan Zhou ◽  
Xiaodong Qi ◽  
Hongwei Bai ◽  
Qiang Fu
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Interfacial Interaction ◽  
Reduced Graphene ◽  
Strong Interfacial Interaction

The different mechanism of the improved mechanical properties of CS–GO and CS–rGO nanocomposites are strong interfacial interaction and recrystallization, respectively.

Improved Mechanical Properties of Graphene Oxide/Poly(ethylene oxide) Nanocomposites by Dynamic Interfacial Interaction of Coordination

2014 ◽  
Vol 67 (1) ◽  
pp. 121 ◽  
Author(s):  
Chen Lin ◽  
Yi-Tao Liu ◽  
Xu-Ming Xie
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Ethylene Oxide ◽  
High Performance ◽  
Interfacial Interaction ◽  
Divalent Metal Ions ◽  
Strong Interfacial Interaction ◽  
Poly Ethylene Oxide ◽  
Coordination Bonds ◽  
Poly Ethylene

A simple and cost-effective strategy to create a strong interfacial interaction of coordination bonds in graphene oxide/poly(ethylene oxide) (GO/PEO) nanocomposites by divalent metal ions are demonstrated in this study. The strong interfacial interaction realizes efficient load transfer during the tensile process to significantly improve the mechanical properties of PEO. In addition, the dynamic interfacial interaction of coordination bonds minimizes the elongation loss. This strategy is applicable to a variety of polymer matrices containing coordination atoms, thus opens up a new opportunity for high-performance GO/polymer nanocomposites with significantly improved mechanical properties.

Preparation of polyoxymethylene/methyl vinyl silicone rubber/thermoplastic polyurethane ternary thermoplastics vulcanizates with good toughness properties

2021 ◽  
pp. 089270572110571
Author(s):  
Wei Fang ◽  
Xiaodong Fan ◽  
Ruilong Li
Keyword(s):  
Silicone Rubber ◽  
Thermoplastic Polyurethane ◽  
Mechanical Tests ◽  
Curing Agent ◽  
Dynamic Vulcanization ◽  
Elongation At Break ◽  
Methyl Vinyl ◽  
Thermoplastic Vulcanizates ◽  
Vulcanization Process ◽  
Batch Mixer

Novel thermoplastic vulcanizates (TPVs) based on polyoxymethylene (POM) and methyl vinyl silicone rubber (MVQ) have been prepared by dynamic vulcanization process through a batch mixer. During the preparation of TPV blends, Di-(tert butyl peroxyisopropyl) benzene (BIBP) was used as the curing agent in order to make MVQ cross-linked and TPU was used to coat MVQ for improving the compatibility of MVQ and POM. In order to understand the influence of different compositions on TPV blends, five groups of experimental processes were described in detail. During these experiments, the amount of POM was reduced from 70phr to 30phr, that of MVQ was gradually increased from 18phr to 42 phr, and TPU was increased from 12phr to 28phr. In addition, the morphology and properties of TPVs were studied by DSC, FTIR, SEM, DMA and mechanical tests. The mechanical testing results showed that with the amount of POM decreasing and the total amount of MVQ and TPU increasing, the tensile strength of the TPV blends gradually was decreased, and the elongation at break was increased accordingly from 35.2 ± 6% of pure POM to 142.8 ± 11% of sample 5#.

Effects of MAH/St grafted nanocellulose on the properties of carbon reinforced styrene butadiene rubber

2019 ◽  
Vol 39 (5) ◽  
pp. 450-458 ◽  
Author(s):  
Yingni Xu ◽  
Caixin Li ◽  
Ju Gu
Keyword(s):  
Mechanical Performance ◽  
Interfacial Interaction ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Strong Interfacial Interaction ◽  
Processing Properties ◽  
Styrene Butadiene ◽  
Vulcanization Process ◽  
Scanning Electron ◽  
Sem Analyses

Abstract Nanocellulose was extracted from bagasse (bagasse nanocellulose, BNC) by hydrolysis with alkali and acid, then grafted by maleic anhydride (MAH) and styrene (St). The modified nanocellulose (BMS) was further investigated to partially replace carbon black (CB) in St butadiene rubber (SBR) composites via coagulation to prepare SBR/BMS/CB composites. Through the comparison of the vulcanization characteristics, processing properties, mechanical properties, and dynamic mechanical performance of them, BMS proved to be more efficient than BNC. The results showed that BMS could activate the vulcanization process, suppress the Payne effect, and increase the modulus and hardness. Moreover, a fine BMS dispersion and strong interfacial interaction were achieved in SBR/BMS/CB composites. The observed reinforcement effects were evaluated based on the results of G′, tanδ and scanning electron microscopy (SEM) analyses of SBR/BMS/CB in comparison with SBR/BNC/CB composites.

Rubber-Thermoplastic Compositions. Part IX. Blends of Dissimilar Rubbers and Plastics with Technological Compatibilization

1985 ◽  
Vol 58 (5) ◽  
pp. 1014-1023 ◽  
Author(s):  
A. Y. Coran ◽  
R. Patel ◽  
D. Williams-Headd
Keyword(s):  
Mechanical Properties ◽  
Block Copolymers ◽  
Melt Mixing ◽  
Thermoplastic Vulcanizate ◽  
Vulcanized Rubber ◽  
Rubber Particles ◽  
Thermoplastic Vulcanizates ◽  
Compatibilizing Agent

Abstract From this work, one can conclude that compositions which have excellent mechanical properties can be prepared by melt-mixing thermoplastic vulcanizates. (A thermoplastic vulcanizate is a composition containing vulcanized rubber particles dispersed in a thermoplastic. Such a composition is usually prepared by vulcanizing the rubber during its melt-mixing with a thermoplastic.) The excellent mixed TPV compositions can be obtained even though the rubbers and plastics are mutually grossly incompatible with respect to thermodynamic considerations. In such cases, however, it appears to be necessary that a compatibilizing agent be present in the mixture to promote the interaction between the thermoplastic materials. Block copolymers whose molecules contain blocks common to each of the thermoplastic blend components are good technological compatibilizing agents (e.g., polypropylene-nylon block copolymers to compatibilize mixtures containing polypropylene and nylon). Compatibilizing block copolymers can form in situ during melt mixing. This appears to be the case when one of the thermoplastic blend components is functionalized to chemically link with another thermoplastic component of the mixed TPV composition. The rubber associated with one thermoplastic can differ greatly from the rubber associated with another thermoplastic component of the mixed TPV blend. Thus, a composition which has good mechanical properties can contain both differing thermoplastics and differing rubbers. As a result, the possible combinations of components for TPV compositions has been greatly expanded.

Properties of Thermoplastic Natural Rubber (TPNR): Influence of Polypropylene Grades on TPNR Properties

2013 ◽  
Vol 844 ◽  
pp. 127-130 ◽  
Author(s):  
Chanida Manleh ◽  
Charoen Nakason ◽  
Natinee Lopattananon ◽  
Azizon Kaesaman
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Crosslink Density ◽  
Rubber Particle ◽  
Complex Viscosity ◽  
Morphological Properties ◽  
Dynamic Vulcanization ◽  
Thermoplastic Natural Rubber ◽  
Pp Blends ◽  
Vulcanization Process

Thermoplastic vulcanizate (TPV) based on natural rubber (NR) and polypropylene (PP) blends were successfully prepared through a dynamic vulcanization process using Brabender Plastograph EC Plus with a rotor speed of 60 rpm at 180°C. Sulfur vulcanization system was used to cure rubber phase in the TPVs. Three grades of PP (i.e., PP700J, HP553R and HP544T) were used to blend with NR at a fixed blend ratio of NR/PP = 60/40. The mechanical properties, crosslink density, complex viscosity and morphological properties of the blends were examined. The results revealed that the dynamically cured NR/PP700J samples showed the best mechanical properties because of higher crosslink density and smaller rubber particle size when compared with those of the blends combined with HP553R and HP544T. Furthermore, the complex viscosity of the TPVs was highest for the blends with PP700J.

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