Dislocation approach to the plastic deformation of semicrystalline polymers: Kinetic aspects for polyethylene and polypropylene*

2002 ◽  
Vol 40 (6) ◽  
pp. 593-601 ◽  
Author(s):  
R. Séguéla
Keyword(s):  
Plastic Deformation ◽  
Semicrystalline Polymers

The role of dislocations for the plastic deformation of semicrystalline polymers as investigated by multireflection X-ray line profile analysis

2012 ◽  
Vol 125 (6) ◽  
pp. 4150-4154 ◽  
Author(s):  
Florian Spieckermann ◽  
Gerald Polt ◽  
Harald Wilhelm ◽  
Michael Kerber ◽  
Erhard Schafler ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Line Profile ◽  
Profile Analysis ◽  
Semicrystalline Polymers ◽  
Line Profile Analysis ◽  
X Ray

On the plastic deformation of the amorphous component in semicrystalline polymers

Polymer ◽  
1996 ◽  
Vol 37 (11) ◽  
pp. 2113-2123 ◽  
Author(s):  
Z. Bartczak ◽  
A. Galeski ◽  
A.S. Argon ◽  
R.E. Cohen
Keyword(s):  
Plastic Deformation ◽  
Semicrystalline Polymers ◽  
Amorphous Component

Plastic deformation of the amorphous component in semicrystalline polymers

1997 ◽  
Author(s):  
Z. Bartczak ◽  
Andrzej Galeski ◽  
A. S. Argon ◽  
R. E. Cohen
Keyword(s):  
Plastic Deformation ◽  
Semicrystalline Polymers ◽  
Amorphous Component

Sem Examinations of Glass Knives

1970 ◽  
Vol 28 ◽  
pp. 282-283
Author(s):  
J. Temple Black
Keyword(s):  
Plastic Deformation ◽  
Tensile Loading ◽  
Resultant Force ◽  
Stress Concentrations ◽  
Edge Chipping ◽  
Surface Flaws ◽  
Edge Defects ◽  
Microscopic Surface

There are two types of edge defects common to glass knives as typically prepared for microtomy purposes: 1) striations and 2) edge chipping. The former is a function of the free breaking process while edge chipping results from usage or bumping of the edge. Because glass has no well defined planes in its structure, it should be highly resistant to plastic deformation of any sort, including tensile loading. In practice, prevention of microscopic surface flaws is impossible. The surface flaws produce stress concentrations so that tensile strengths in glass are typically 10-20 kpsi and vary only slightly with composition. If glass can be kept in compression, wherein failure is literally unknown (1), it will remain intact for long periods of time. Forces acting on the tool in microtomy produce a resultant force that acts to keep the edge in compression.

Stereo Electron Microscopy Applied to High Resolution Freeze-Etch Replicas

1970 ◽  
Vol 28 ◽  
pp. 306-307
Author(s):  
L. Andrew Staehelin
Keyword(s):  
Electron Microscopy ◽  
Plastic Deformation ◽  
High Resolution ◽  
Smooth Surfaces ◽  
Small Particles ◽  
Membrane Surfaces ◽  
Wide Acceptance ◽  
New Information ◽  
Number Of Particles ◽  
Small Holes

Freeze-etched membranes usually appear as relatively smooth surfaces covered with numerous small particles and a few small holes (Fig. 1). In 1966 Branton (1“) suggested that these surfaces represent split inner mem¬brane faces and not true external membrane surfaces. His theory has now gained wide acceptance partly due to new information obtained from double replicas of freeze-cleaved specimens (2,3) and from freeze-etch experi¬ments with surface labeled membranes (4). While theses studies have fur¬ther substantiated the basic idea of membrane splitting and have shown clearly which membrane faces are complementary to each other, they have left the question open, why the replicated membrane faces usually exhibit con¬siderably fewer holes than particles. According to Branton's theory the number of holes should on the average equal the number of particles. The absence of these holes can be explained in either of two ways: a) it is possible that no holes are formed during the cleaving process e.g. due to plastic deformation (5); b) holes may arise during the cleaving process but remain undetected because of inadequate replication and microscope techniques.

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