Damping Performance of CB Filled NR/ENR, NR/BR and NR/IIR Compounds

2014 ◽  
Vol 716-717 ◽  
pp. 70-73
Author(s):  
Yue Qiong Wang ◽  
Zheng Peng ◽  
Jie Ping Zhong ◽  
Kui Xu ◽  
Chang Jin Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Carbon Black ◽  
Natural Rubber ◽  
Dynamic Mechanical Properties ◽  
Comprehensive Analysis ◽  
Butadiene Rubber ◽  
Mechanical Mixing ◽  
Mixing Method ◽  
Isoprene Rubber

Natural rubber (NR)/epoxidized natural rubber (ENR)/carbon black (CB), natural rubber/butadiene rubber (BR)/carbon black and natural rubber/isobutylene-isoprene rubber (IIR)/carbon black compounds were prepared by mechanical mixing method. The mechanical properties, dynamic mechanical properties for the compounds were investigated respectively. The temperature range of tanδ>0.3 of NR/ENR40/CB compound was wider and shifted to high temperature than NR/CB compound. Comprehensive analysis indicated that NR/BR/CB and NR/IIR/CB compounds had no better damping performance than NR/CB compounds, while NR/ENR/CB compound had better damping performance.

Mixing Methods Influencing on Properties of Epoxidized Natural Rubber/Polypropylene Thermoplastic Vulcanizates

2013 ◽  
Vol 844 ◽  
pp. 109-112 ◽  
Author(s):  
Chesidi Hayichelaeh ◽  
Charoen Nakason ◽  
Anoma Thitithammawong
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Dynamic Mechanical Properties ◽  
Epoxidized Natural Rubber ◽  
Melt Mixing ◽  
Dynamic Mechanical ◽  
Thermoplastic Vulcanizates ◽  
Mixing Method ◽  
Internal Mixer

Epoxidized natural rubber (ENR)/Polypropylene (PP) thermoplastic vulcanizates were prepared by melt mixing method in an internal mixer. Influences of different mixing methods for incorporation of processing oil into the TPVs on tensile and dynamic mechanical properties of the TPVs and crystallinity of the PP were investigated. Results show that distribution of processing oil in the ENR/PP TPV is important due to the processing oil can promote and in the same time can interrupt an improvement in elastomeric properties of the TPV. Incorporation of processing oil into the ENR phase by preparation of oil extended ENR (the mixing method 1) before mixing with the PP was the better way to produce the TPV. It promoted the TPV with superior tensile and dynamic mechanical properties than the TPVs prepared from the mixing method 2 and 3 in which the processing oil was directly added into the PP phase. Furthermore, the TPV from the mixing method 1 had less effect of processing oil on the PP crystallization.

scholarly journals The influence of natural rubber – butadiene rubber and carbon black type on the mechanical properties of tread compound

2017 ◽  
Vol 223 ◽  
pp. 012013 ◽  
Author(s):  
L A Wisojodharmo ◽  
R Fidyaningsih ◽  
D A Fitriani ◽  
D K Arti ◽  
Indriasari ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Natural Rubber ◽  
Butadiene Rubber

scholarly journals Natural Rubber/High Cis Butadiene Rubber-Filler Interactions And Rheological Properties In Rubber Airbag Compounding Formulation

2019 ◽  
Vol 1 (1) ◽  
pp. 16-20
Author(s):  
Ade Sholeh Hidayat ◽  
Dewi Kusuma Arti ◽  
Lies Agustine ◽  
Mahendra Aggaravidya
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Natural Rubber ◽  
Rheological Properties ◽  
High Strain ◽  
Butadiene Rubber ◽  
Rubber Compound ◽  
General Application ◽  
Optimum Formulation ◽  
Strain Sweep

The rheological properties of rubber compound in general application and especially rubber airbag compounding is very important to predict the mechanical properties of rubber products, as well as useful for obtaining optimum formulations in the research and development of a product. The viscoelastic properties of the rubber compound are strongly influenced by the type of rubber and the filler used. The purpose of this research is to investigate the rheological properties of rubber airbag compounding using natural rubber (NR) and high cis butadiene rubber (BR) materials with various compositions of carbon black N220 filler. The mixing of NR and BR with 90/10 phr ratio was performed in a kneader, with carbon black N220 filler variation: 35, 45, 50 phr, named as BD1, BD2 and BD3, respectively. Rheology and viscosity properties were tested using Rubber Process Analyser (RPA) 2000 Alpha Technology. The test was performed with strain sweep at 70 C and comparing 1% strain and 10% strain to indicate dispersion and homogenity. Frequency sweep was performed at 100 C at 6 cpm and 7% strain.  High strain sweep was also done as well as strain sweep after cure (ASTM D6601) which material were cured at 1800 C and strain sweep was applied at 1%, 2%, 5%, 10% and 20% to determine the mechanical properties of compound. The result showed that 35 phr of carbon black N220 (BD1) was the optimum formulation since compounds BD3 and BD2 have higher elastic torque (S’) peaks and may be harder to process as a result. The results for Tan (Delta) from all compounds in the high strain sweep verify that compounds BD3 and BD2 have lower Tan(Delta) values and therefore will probably have more difficulty in processing. The highest peak of modulus values at low strain indicates the carbon black with the highest reinforcement or the worst dispersion. BD3 and BD2 have high peak modulus value which is show the worse dispersion compared to BD1. Keywords: rheology, rubber airbag, filler, RPA

The Dispersion of Carbon Black in Rubber Part III. The Effect of Dispersion Quality on the Dynamic Mechanical Properties of Filled Natural Rubber

1992 ◽  
Vol 65 (5) ◽  
pp. 1016-1041 ◽  
Author(s):  
A. Y. Coran ◽  
J-B. Donnet
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Natural Rubber ◽  
Shear Strain ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Short Period ◽  
Dispersion Quality ◽  
Carbon Black Dispersion

Abstract The Part I of this series described a rapid method for determining the quality of carbon-black dispersion. The second paper (Part II) was concerned with the kinetics of the dispersion of carbon black into natural rubber (dispersion quality as a function of mixing time) in an internal mixer. In this paper we consider the effects of changes in dispersion quality on the dynamic mechanical properties of both unvulcanized and vulcanized natural rubber. The effects of changes in the degree of carbon-black dispersion were measured by using a new prototype moving-die rheometer (which is presently being developed at Monsanto Instruments & Equipment Research Laboratory). By using this prototype rheometer, G′ and G″ were measured as functions of shear-strain amplitude, temperature, and frequency. Increases in the degree of carbon-black dispersion in uncured natural rubber (starting from very poor dispersion quality) give decreases in the values of both G′ and G″. The decrease in dynamic moduli with increases in the degree of carbon-black dispersion might be explained on the basis of a network of agglomerates which exists when the quality of dispersion is extremely poor. In the case of uncured samples, values of G′, measured at low strains (e.g. ±1%), become reduced after the imposition of a larger (±50%) sinusoidal shear strain for a short period of time (e.g. 3 s). Then, with the passage of time, the reduced value of G′ partially recovers. The extent of this recovery increases with increases in the dispersion rating DR. Similar results were obtained with respect to the loss modulus G″. In both cases, the extent of recovery is much less when the carbon black is very poorly dispersed. The unrecoverable proportion of G′ or G″ is also considered to be due to a network composed of mutually interactive agglomerates of carbon black.

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