Influence of Rubber Particle Size on Functional Properties of a Composite Material Based on Scrap Tires and a Polymer Binder

2020 ◽  
Vol 850 ◽  
pp. 107-111
Author(s):  
Laimonis Mālers ◽  
Agnija Cirvele
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Functional Properties ◽  
Material Properties ◽  
Rubber Particle ◽  
Polymer Binder ◽  
Scrap Tires ◽  
Elongation At Break ◽  
Rubber Particles ◽  
Purposeful Selection

Functional properties of composite material based on mechanically grinded scrap tires with different particle size of fractioned crumb and polyurethane type polymer binder were investigated to estimate influence of rubber particles size and content on composite material properties (Shore C hardness, compressive stress at 10 % deformation, tensile strength, elastic modulus and elongation at break, apparent density). Optimization possibilities of composite material consisting of rubber particles with different sizes or fractions were investigated. The obtained results show that variation of composition of the composite material by changing size of rubber granulate have definite influence on selected properties of the material. Purposeful selection and mutual combination of rubber particles size included in material can ensure desirable and predictable mechanical properties of composite material.

Polyurethane Binder Mechanical Properties under Different Crosslinking Conditions

2016 ◽  
Vol 721 ◽  
pp. 3-7 ◽  
Author(s):  
Renate Plesuma ◽  
Laimonis Malers
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Elasticity Modulus ◽  
Polymer Binder ◽  
Direct Influence ◽  
Air Humidity ◽  
Crosslinking Degree ◽  
Scrap Tires ◽  
Elongation At Break ◽  
Relative Air Humidity

Mechanical properties of polyurethane type polymer binder with selected reactivity, used for production of the composite material based on scrap tires, were investigated under different crosslinking conditions: temperature, relative air humidity, hardening time. Shore C hardness, tensile strength and elongation at break were selected as main parameters, reflecting crosslinking degree of the prepared polymer binder films. DMA investigation of the samples in tensile mode of loading were realized to clear up influence of deformation circumstances on storage and loss components of the elasticity modulus. Strong correlation between mentioned above mechanical properties of the polymer binder and selected crosslinking conditions of the polymer were obtained. It was affirmed previously, that crosslinking degree of the polymer binder in the same time has direct influence also on mechanical properties of the composite material.

Deformation mechanisms of sub-micrometer thermoplastic vulcanizates obtained by reaction-induced phase separation of miscible poly(ε-caprolactone)/dimethacrylate systems

Soft Matter ◽  
2017 ◽  
Vol 13 (38) ◽  
pp. 6905-6912 ◽  
Author(s):  
Roy l'Abee ◽  
Martin van Duin ◽  
Han Goossens
Keyword(s):  
Particle Size ◽  
Phase Separation ◽  
Deformation Behavior ◽  
Rubber Particle ◽  
Mechanical Deformation ◽  
Deformation Mechanisms ◽  
Chemical Grafting ◽  
Rubber Particles ◽  
Thermoplastic Vulcanizates ◽  
Grafting Onto

The rubber particle size as well as chemical grafting onto the surface of cross-linked rubber particles control the mechanical deformation behavior of sub-μm thermoplastic vulcanizates (TPVs).

Water as Significant Factor Having Influence on Composite Material Properties Based on Scrap Tyres and Polyurethane Binder

2018 ◽  
Vol 762 ◽  
pp. 182-185 ◽  
Author(s):  
Laimonis Malers ◽  
Renate Kurme
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Material Properties ◽  
Polymer Binder ◽  
Special Treatment ◽  
Rubber Crumb ◽  
Air Humidity ◽  
Crosslinking Degree ◽  
Scrap Tires ◽  
Influence Of Water

Composite materials based on scrap tires and polyurethane type polymer binder with defined reactivity were investigated to underline the influence of water (varying air humidity, special treatment of rubber crumb with water) during the production on selected mechanical properties. Compressive stress and modulus of elasticity E at 10% deformation, Shore C hardness and apparent density were investigated. Strong correlation between the above-mentioned mechanical properties of the composite materials and the crosslinking conditions of the polymer (presence of water during the production of composite materials) were observed. It has been confirmed previously that the crosslinking degree of polyurethane type binder separately and, therefore, at the same time mechanical properties of binder was strongly dependent on water as a significant factor during the hardening of the polymer.

Study of Devulcanised Crumb Rubber-Peat Bio-Based Composite for Environmental Applications

2019 ◽  
Vol 799 ◽  
pp. 148-152 ◽  
Author(s):  
Vjaceslavs Lapkovskis ◽  
Viktors Mironovs ◽  
Kristine Irtiseva ◽  
Dmitri Goljandin
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Oil Spill ◽  
Rubber Particle ◽  
Crumb Rubber ◽  
Raw Material ◽  
Environmental Applications ◽  
Porous Substrate ◽  
Spilled Oil ◽  
Final Composite

A proper recycling and secondary reuse of end-of-life car tires (ELTs) remain an important issue for many regions. Devulcanised crumb rubber as a product of ELT recycling could be used for very different applications, including site remediation by spilled oil products. In current paper a development of new bio-based composite material containing devulcanised crumb rubber and cenospheres is suggested. Designed bio-based composite can be used as a oil spill adsorbent, material for civil engineering, and as a raw material for further modification by introduction of ferromagnetic components. Homogenised peat with peat content 14.0 ± 1.5 wt%, particle size 0.01 – 0.5 mm used as a natural bio-based binder. Devulcanised crumb rubber particle size 1.0 – 4.0 mm was used as a porous substrate. Designed compositions contained 5, 10, 15, 20 wt% (before drying) of devulcanised crumb rubber. Cenospheres have duplex function for designed composite: lightweight additive that makes final product floatable, and at the same time minimises shrinkage of dried product. It was found that devulcanised crumb rubber reduces density of final composite and adding open porosity. Developed bio-based composites could be manufactured in granules by drum granulation technique for further environmental applications. Formability and apparent density of bio-based composite are studied.

Some functional properties of composite material based on scrap tires

2013 ◽  
Vol 3 (3) ◽  
Author(s):  
Renate Plesuma ◽  
Laimonis Malers
Keyword(s):  
Composite Material ◽  
Uv Radiation ◽  
Functional Properties ◽  
Rubber Crumb ◽  
Initial Thickness ◽  
Technological Parameters ◽  
Scrap Tires ◽  
Practical Applications ◽  
Modified Method ◽  
Mechanical Influence

AbstractThe utilization of scrap tires still obtains a remarkable importance from the aspect of unloading the environment from non-degradable waste [1]. One of the most prospective ways for scrap tires reuse is a production of composite materials [2] This research must be considered as a continuation of previous investigations [3, 4]. It is devoted to the clarification of some functional properties, which are considered important for the view of practical applications, of the composite material. Some functional properties of the material were investigated, for instance, the compressive stress at different extent of deformation of sample (till 67% of initial thickness) (LVS EN 826) [5] and the resistance to UV radiation (modified method based on LVS EN 14836) [6]. Experiments were realized on the purposefully selected samples. The results were evaluated in the correlation with potential changes of Shore C hardness (Shore scale, ISO 7619-1, ISO 868) [7, 8]. The results showed noticeable resistance of the composite material against the mechanical influence and ultraviolet (UV) radiation. The correlation with the composition of the material, activity of binder, definite technological parameters, and the conditions supported during the production, were determined. It was estimated that selected properties and characteristics of the material are strongly dependent from the composition and technological parameters used in production of the composite material, and from the size of rubber crumb. Obtained results show possibility to attain desirable changes in the composite material properties by changing both the composition and technological parameters of examined material.

Effect of Particle Sizes on Film Formation Behavior of Hevea brasiliensis Natural Rubber Latex

2015 ◽  
Vol 659 ◽  
pp. 383-387 ◽  
Author(s):  
Nut Churinthorn ◽  
Adun Nimpaiboon ◽  
Jitladda Sakdapipanich ◽  
Chee Cheong Ho
Keyword(s):  
Particle Size ◽  
Natural Rubber ◽  
Room Temperature ◽  
Storage Time ◽  
Film Formation ◽  
Rubber Particle ◽  
Natural Rubber Latex ◽  
Wide Distribution ◽  
Rubber Particles ◽  
Individual Particles

Natural Rubber (NR) latex obtained from Hevea brasiliensis contains a wide particle size distribution. The aim of this study is to investigate the effect of small rubber particles (SRP) and large rubber particles (LRP) on the characteristics of film formation. The rubber particle with different mean diameters can be separated by centrifugation at various speeds to prepare SRP and LRP latex. The average size of SRP and LRP were characterized by light scattering technique to show that the size of SRP was in the range of 0.20 μm, while that of LRP was larger with the wide distribution. SRP and LRP latex were dried at room temperature to study the film formation behaviors. The results showed that the film compaction time increased with increasing the particle size of NR. Furthermore, the rubber film were aged at room temperature for 3 weeks in order to observe the surface morphology using atomic forced microscopy (AFM) by tapping mode. The AFM images showed that SRP readily formed a coalescence film, while LRP showed individual particles on the surface of film at 24 h of storage time. The surface of both SRP and LRP films was smoother after storage. However, LRP film still showed individual particles on the surface after 3 weeks of storage time.

Study on Rubberized Concrete-Filled Steel Tubular Stub Columns Under Axial Compression

2020 ◽  
Vol 12 (9) ◽  
pp. 1371-1380
Author(s):  
Yanhua Liu ◽  
Shiyu Tong ◽  
Qingxin Ren
Keyword(s):  
Finite Element Analysis ◽  
Particle Size ◽  
Rubber Particle ◽  
Local Buckling ◽  
Steel Tube ◽  
Rubberized Concrete ◽  
Replacement Ratio ◽  
Element Analysis ◽  
Rubber Particles ◽  
Stub Columns

In order to study the behavior of rubberized concrete-filled steel tubular (RuCFST) stub columns, an innovative composite member with steel tube and concrete filled with rubber particles was made. Twenty-four RuCFST stub columns were tested, in which six conventional CFST stub columns were prepared for comparison. The effects of changing rubber particle size (in the range of 1–2 mm and 2–5 mm) and rubber replacement ratio (0%, 10%, 20% replacement of sand) were made to discover the characteristics of the columns. The tested RuCFST stub columns displayed a local buckling similar to the conventional CFST stub columns. The tested results are compared with the predicted results of finite element analysis and the existing codes of CFST. Generally, the agreement between the predictions and results are reasonable.

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