Scanning Electron Microscopy Studies of Nitrile Rubber Fractured Surfaces

1980 ◽  
Vol 53 (2) ◽  
pp. 321-326 ◽  
Author(s):  
A. K. Bhowmick ◽  
S. Basu ◽  
S. K. De
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fracture Surface ◽  
Polymer Fibers ◽  
Tensile Fracture ◽  
Flow Lines ◽  
Tensile Fracture Surface ◽  
Test Conditions ◽  
Heat Buildup ◽  
Scanning Electron

Abstract The fracture surfaces of a NBR vulcanizate after different test conditions have been studied by scanning electron microscopy. It has been shown that failure surfaces manifest typical characteristics dependent on the nature of the test. Tensile fracture surface shows occurrence of two different tear rates in the case of a filled NBR vulcanizate, while tear fracture is characterized by a few long flow lines. De Mattia flexing leads to layering of polymer fibers. Heat buildup and abrasion tests generate a ribbed structure on the surface.

Properties Evaluation of Micro-Crystalline Cellulose and Starch as Bio-Filler in Rubber Compounding

2016 ◽  
Vol 1133 ◽  
pp. 593-597 ◽  
Author(s):  
Mohd Khairulniza Mansor ◽  
Ruslimie Che Ali
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Filler Loading ◽  
Tensile Fracture ◽  
Crystalline Cellulose ◽  
Tensile Fracture Surface ◽  
Homogenous Distribution ◽  
Cure Time ◽  
Internal Mixer ◽  
Scanning Electron

Effects of filler loading on the mechanical properties of Epoxidised natural rubber (ENR) filled with bio-fillers were studied. The compounds with different filler loadings (0, 30, 50, 70 phr) were prepared in a Haake internal mixer. Result showed that the viscosity of the compounds increased with filler loading and exhibited longer cure time with higher loading of the bio-filler. The mechanical properties of starch-filled vulcanisates present better tensile strength at 50 phr when compared to micro-crystalline cellulose (MCC) filled vulcanisates at similar filler loadings. The scanning electron microscopy (SEM) of tensile fracture surface of 50 phr starch-filled vulcanisates illustrated a homogenous distribution in comparison with MCC-filled compounds.

scholarly journals Simultaneous Improvement in the Tensile and Impact Strength of Polypropylene Reinforced by Graphene

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Li Juan
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Fracture Surface ◽  
Impact Strength ◽  
Melt Blending ◽  
Elongation At Break ◽  
Morphological Behavior ◽  
Scanning Electron

The nanocomposites of polypropylene (PP)/graphene were prepared by melt blending. The effects of the dosage of graphene on the flow and mechanical properties of the nanocomposites were investigated. The morphologies of fracture surfaces were characterized through scanning electron microscopy (SEM). The graphene simultaneous enhanced tensile and impact properties of nanocomposites. A 3.22% increase in tensile strength, 39.8% increase in elongation at break, and 26.7% increase in impact strength are achieved by addition of only 1 wt.% of graphene loading. The morphological behavior indicates the fracture surface of PP/graphene is more rough than that of pure PP.

Fracture of Polymers Under Repetitive Loading

1986 ◽  
Vol 79 ◽  
Author(s):  
J. A. Sauer ◽  
C. C. Chen
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Scanning Electron Microscopy ◽  
Fracture Surface ◽  
Surface Morphology ◽  
Thermal Effects ◽  
Second Phase ◽  
Fracture Surface Morphology ◽  
Repetitive Loading ◽  
Scanning Electron

AbstractThe fracture surface morphology of various polymer specimens, fractured under alternating loading, has been examined by scanning electron microscopy. Illustrations are given of both typical and unusual fracture surfaces and the influence of such variables as composition, molecular weight, presence of a dispersed second phase and induced thermal effects is discussed.

Microstructure and Mechanical Properties of AZ91D Alloy by Three Types of Forging Process

2019 ◽  
Vol 285 ◽  
pp. 87-91
Author(s):  
Wen Tong Tian ◽  
Hui Yang
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
High Strength ◽  
Tensile Fracture ◽  
Az91d Alloy ◽  
Forging Process ◽  
Highly Uniform ◽  
Fracture Morphologies ◽  
Scanning Electron

Forging processes, such as liquid forging, rheoforging and thixoforging process, were used in this study as an effective method for manufacturing high-strength, finely-dispersed and highly-uniform AZ91D alloy parts. It has been found that although the microstructures of the three forging parts are all composed of α-Mg and β-Mg17Al12 phases, their shapes, sizes, numbers and distributions are all different, which also influences their mechanical properties. The tensile fracture morphologies were observed and their energy spectrums were analyzed by scanning electron microscopy. The results show that the cracks are mainly originated from the brittle fracture of the β-Mg17Al12 eutectic phases, whereas their fracture morphologies are greatly different, which indicate the direction for providing a reasonable forging process.

Sign in / Sign up

Export Citation Format

Share Document