ISSN:
0098-1273
Schlagwort(e):
Physics
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
A technique is described which enabled exceptionally thin sections of rubbery material to be cut for electron microscopy, and applied to samples of polystyrene-polybutadiene-polystyrene (SBS) copolymers which contain the segregated S phase in the form of cylinders arranged in a regular hexagonal macrolattice throughout the macroscopic specimen, with center to center distance of 300 Å. The technique consisted of sectioning the material hardened by a combination of osmic acid treatment and cooling with liquid air. By this method longitudinal sections containing single layer S rods could be obtained as verified by appropriate tilting tests. Such sections enabled the viewing of single cylinders without overlap which in turn enables the study of the structure of individual cylinders and the effect of various treatments on this structure. Examples quoted include the yielding or breaking of individual cylinders on longitudinal deformation of the macroscopic sample relating to our mechanical studies to be reported elsewhere. The technique also enabled sectioning in the swollen state of samples which are not sectionable other wise and this leads to the recognition of new structures and results in an overall improvement of image quality even when the thinness itself is not the prime requirement.
Zusätzliches Material:
5 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pol.1976.180140508
