Analysis of Contributions to Dynamic Mechanical Properties of Carbon Filled Vulcanizates

1968 ◽  
Vol 41 (5) ◽  
pp. 1215-1218 ◽  
Author(s):  
Andries Voet ◽  
F. Russell Cook
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Dynamic Modulus ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Transient Structure

Abstract A method has been developed to separate quantitatively the contributions of filler volume, particle anisometry, and interaction with the elastomer to the dynamic modulus of carbon black loaded vulcanizates. The influence of reduction of transient structure by chemical promotion has been evaluated.

Dynamic-Mechanical Properties of Tin-Coupled SBRs

1995 ◽  
Vol 68 (2) ◽  
pp. 259-266 ◽  
Author(s):  
C. A. Sierra ◽  
C. Galán ◽  
J. M. Gómez Fatou ◽  
V. Ruíz Santa Quiteria
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Interaction Parameter ◽  
Anionic Polymerization ◽  
Dynamic Mechanical Properties ◽  
Tin Compounds ◽  
Dynamic Mechanical ◽  
Tin Content ◽  
First Time

Abstract The interaction between rubber and carbon black in compounds for road tire treads has been analyzed by using mechanical and dynamical measurements in three cured compounds based on SBRs. The rubbers were prepared in solution by anionic polymerization, and coupled with tin compounds in which the carbon-tin bond at the end of the chain may correspond to styryl or butadienyl terminations. The interaction parameter, defined by the ratio of mechanical and dynamic terms, has been used for the first time for the evaluation of the compounds. The SBRs with tin-butadienyl bonds exhibit an improved interaction with the filler, with increasing tin content.

EFFECT OF CARBON BLACK NATURE ON DYNAMIC MECHANICAL PROPERTIES AND REINFORCEMENT OF NR VULCANIZATION BY LATEX TECHNIQUES

2017 ◽  
Vol 90 (4) ◽  
pp. 611-620
Author(s):  
An Dong ◽  
Zhang Zhiyi ◽  
Jia Haixiang ◽  
Shou Jinquan ◽  
Zhang Huan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Dynamic Mechanical Properties ◽  
Mixing Process ◽  
Scanning Electron Micrograph ◽  
Dynamic Mechanical ◽  
Unit Operations ◽  
New Process ◽  
Static Mechanical ◽  
Filler Dispersion

ABSTRACT The influence of the structure and size of carbon black on the static mechanical and dynamic mechanical properties of filled natural rubber (NR) compounds is investigated in detail. A new process for the production of carbon black master batches with enhanced mechanical properties has been developed. The unit operations in the process are the preparation of carbon black slurry in the presence of a suitable surfactant, addition of the slurry to the fresh NR latex under stirring, coagulation of the mixture by the addition of acid, dewatering of the coagulum, and drying to obtain carbon black–incorporated NR. The competence of the new technique is established by comparing the characteristics of the carbon black–incorporated NR by the mill mixing process (control). The mechanical properties, including tensile strength, modulus, tear strength, and hardness, are superior for the vulcanization prepared by the latex-suspension coagulation techniques. The improvement shown by the vulcanization prepared by the latex-suspension coagulation techniques was attributed to the better filler dispersion evidenced from the scanning electron micrograph along with the attainment of a higher level of vulcanization.

Experimental Investigation on the Electrical and Dynamic Mechanical Properties of PMN/Electrically Conductive Carbon Black/Butyl Composites

2007 ◽  
Vol 351 ◽  
pp. 171-175 ◽  
Author(s):  
Yan Bing Wang ◽  
Zhi Xiong Huang ◽  
Yan Qin ◽  
Ming Du ◽  
Lian Meng Zhang
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Loss Factor ◽  
Dynamic Mechanical Properties ◽  
Polymer Materials ◽  
Electrically Conductive ◽  
Dynamic Mechanical ◽  
Temperature Range ◽  
Conductive Carbon Black ◽  
Three Phase

In this paper, a three-phase composite with electrically conductive carbon black (ECCB) and piezoelectric ceramic particles, PMN, embedded into butyl (PMN/ECCB/IIR) was prepared by simple blend and mold-press process. Dynamic mechanical properties with various ECCB loading were tested by dynamic mechanical analysis (DMA). DMA shows that the ECCB loading has remarkable effect on the dynamic mechanical properties of the three-phase composite. The temperature range of loss factor (tanδ) above 0.3 the composite was broadened by almost 100°C and the maximum of loss factor shifts to higher temperature in the testing temperature range respectively with increasing the ECCB loading. The piezoelectric damping theory was used to explain the experimental results. The three-phase composites with proper composition can be used as high damping polymer materials.

PVA-Based Scaffolds for the Repair of Musculoskeletal Soft Tissue

2007 ◽  
Author(s):  
L. P. Serino ◽  
M. G. Cascone ◽  
L. Lazzeri ◽  
P. A. Torzilli ◽  
S. A. Maher
Keyword(s):  
Mechanical Properties ◽  
Phase Angle ◽  
Dynamic Modulus ◽  
Composite Scaffold ◽  
Dynamic Mechanical Properties ◽  
Cartilage Defects ◽  
Poly Vinyl Alcohol ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior

The objective of this study was to design a partly-degradable scaffold to repair cartilage defects. The scaffold, based on poly(vinyl alcohol), PVA, was intended to maintain long-term mechanical integrity and to facilitate cell proliferation via bioactive agent release from contained microparticles, made from either alginate, ALG or poly(lactic-co-glycolic acid), PLGA. The aim of this study was to characterize the morphological features and mechanical behaviour of composite scaffolds as a function of microparticle type and percent content. Our hypothesis was that the dynamic mechanical properties (Dynamic Modulus and Phase Angle) of the composite scaffold would not be affected by microparticle type, but that Dynamic Modulus would increase as a function of increased microparticle content. Scanning Electron Microscopy confirmed that the manufacturing process homogenously dispersed microspheres within the scaffolds. For pure PVA samples Dynamic Modulus ranged from 66±3 kPa at 0.01 Hz to 83±3 kPa at 50 Hz. As ALG microsphere content increased from 25% to 75%, Dynamic Modulus ranged from 92±5 kPa at 0.01 Hz to 153±19 kPa at 50 Hz. As the microsphere content increased from 25% to 75% PLGA, Dynamic Modulus ranged from 85±9 kPa at 0.01 Hz, to 157±16 kPa at 50 Hz. As expected, Dynamic Modulus increased with increasing test frequencies. For pure PVA specimens Phase Angle ranged from 4.3±0.8 degrees at 0.01 Hz to 12±1.2 degrees at 50 Hz. Phase Angle was not affected by microsphere content. In conclusion, the addition of microspheres affected the dynamic mechanical behavior, in particular Dynamic Modulus, of PVA scaffolds. However, the dynamic mechanical properties were not affected by the polymer from which the microspheres were manufactured. These findings suggest that microsphere type can be chosen to optimize the inclusion of bioactive factors, without detrimentally affecting the mechanical properties of the composite scaffold. It also suggests that % content of included microspheres can be used to modulate the mechanical properties of the scaffold at time zero.

Study on the Effects of Different Types of Carbon Black on the Performance of SBR2564S

2014 ◽  
Vol 971-973 ◽  
pp. 178-182
Author(s):  
Nai Xiu Ding ◽  
Yi Jia ◽  
Pei Yan Zuo ◽  
Li Li Wang ◽  
Hai Tao Wang
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Permanent Deformation ◽  
Poor Performance ◽  
Carbon Black Particle ◽  
Crosslinking Density ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Vulcanized Rubber ◽  
Black Particle

The curing characteristics,crosslinking density,compressive permanent deformation,the conventional mechanical properties and dynamic mechanical properties of SBR2564S filled with different carbon black were studied.The results indicated that with the increase in specific surface area of carbon black particles，Mooney viscosity of the resulting mixture increased while the scorch time decreased.As the carbon black particle size increases, tensile strength and tear strength of SBR2564S were reduced,rebound and compressive set were increased.The kinds of carbon black had little effect on the crosslinking density of vulcanized rubber of SBR2564S.It had poor performance on dynamic mechanical properties of the resulting mixture filled with small carbon black particle size.SBR2564S vulcanizates with good comprehensive properties was obtained when N330 was used.

Strain Dependence of Dynamic Mechanical Properties of Carbon Black-Filled Rubber Compounds

1996 ◽  
Vol 69 (1) ◽  
pp. 15-47 ◽  
Author(s):  
J. D. Ulmer
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Strain Amplitude ◽  
Dynamic Mechanical Properties ◽  
Model Description ◽  
Strain Dependence ◽  
Dynamic Mechanical ◽  
Filled Rubber ◽  
Rubber Compounds ◽  
Viscous Modulus

Abstract The strain dependencies of dynamic mechanical properties of carbon black-filled rubber compounds have been modeled by Kraus. Evaluation of the Kraus model with carbon black loadings up to 110 phr shows that it provides a fairly good overall description of elastic modulus, G′, as a function of strain, γ. The model description of G′ strain dependence improves with decreased carbon black loading, and is very good with carbon black loadings of 50 phr and less. The model description of viscous modulus strain dependence, G″(γ), is less successful than the G′(γ) description. Several empirical modifications of the viscous modulus model are examined. The most improved model is a very good approximation to viscous modulus over a wide experimental strain-range. Its utility, and that of the Kraus G′(γ) model, are illustrated through calculation of simple shear dynamic properties from torsion property measurements on a solid cylinder, where the strain amplitude varies across the specimen radius. The models allow transformation of the apparent moduli, reported as functions of strain amplitude at the cylinder's outer edge, to their true counterparts, G′(γ) and G″(γ), as functions of uniform strain amplitude. Although the G′(γ) and modified G″(γ) models apply to a wide range of experimental strains, some uncertainties associated with each model's accuracy remain, and there are inconsistencies in the relation of one model to the other. Reservations associated with the models might be resolved through refined treatments of the test specimen geometries.

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