scholarly journals BUTADIENE-NITRILE RUBBERS OBTAINED USING POLYVINYL CHLORIDE GELATED WITH A VULCANIZING SYSTEM

2021 ◽  
pp. 79-86
Author(s):  
A. F. Puchkov ◽  
M. P. Spiridonova ◽  
E. P. Apevalina ◽  
M. V. Buzuluckova ◽  
D. A. Kuczov ◽  
...  
Keyword(s):  
Polyvinyl Chloride ◽  
Dispersion Medium ◽  
Nitrile Rubbers

Vulcanizing systems obtained by special methods of processing polyvinyl chloride (PVC) plastisols in a composition with sulfur pastes, in which lactam-containing melts act as a dispersion medium, are effective vulcanizing systems for BNC-based rubbers.

A Replica Technique for the Inside Surfaces of Small Diameter Pipes and Tubes

1967 ◽  
Vol 25 ◽  
pp. 352-353
Author(s):  
T. G. Gregory
Keyword(s):  
Polyvinyl Chloride ◽  
Small Diameter ◽  
Replica Technique ◽  
Tube Size ◽  
Inside Diameter ◽  
Complete Inspection ◽  
Operating Limits

A nondestructive replica technique permitting complete inspection of bore surfaces having an inside diameter from 0.050 inch to 0.500 inch is described. Replicas are thermally formed on the outside surface of plastic tubing inflated in the bore of the sample being studied. This technique provides a new medium for inspection of bores that are too small or otherwise beyond the operating limits of conventional inspection methods.Bore replicas may be prepared by sliding a length of plastic tubing completely through the bore to be studied as shown in Figure 1. Polyvinyl chloride tubing suitable for this replica process is commercially available in sizes from 0.037- to 0.500-inch diameter. A tube size slightly smaller than the bore to be replicated should be used to facilitate insertion of the plastic replica blank into the bore.

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