Font size
WorksheetsINTERNAL TRAINING R&D (CROSSLINKING)
Total questions: 10
Worksheet time: 6mins
Sulphur Vulcanization is the process for the whole technology of hydrocarbon rubber with olefinic saturation and basis for major industrial usage of linear polymers?
True
False
The objectives of compound are as per following except:
To produce a formulation whose final physical and chemical properties are fully suited to the functions of final product
To increase elastic modulus of rubber and improve dimensional stability
To achieve maximum cost efficiency of ingredients used.
To ensure the compound will undergo processing with each and consistency.
Which of the following is not the component of latex compound?
Defoamer
Destabilizer
Filler
Dispersing agent
How to assess extent of pre-cure achieved during maturation?
Heat and chemical stability tests
Stress strain measurement (PRM)
Swelling Index of thin latex dipped film
Chloroform test on latex film
What are the changes that occur during crosslinking?
Extension at break increase progressively
Increased resistance to solvent attack
Tear strength passes through a minimum
No longer thermoplastic
Choose vulcanization types:
Amine
Metal oxide
Peroxide
Sulphur
Select two widely used vulcanization process
Prevulcanized followed by drying
Post vulcanization followed by maturation
Drying followed by prevulcanized
Maturation followed by post vulcanization
CC crosslink are stronger and stable than sulfidic crosslink?
True
False
Degree of cure and cure rate are affected by:
Temperature of curing
Duration of curing
Dosage and ratio of curing agent
How to predict shelf life of glove?
Accelerated aging. Glove subjected to extended controlled heating in oven 70c for 7 days
Accelerated aging Accelerated aging. Glove subjected to extended controlled heating in oven 70c for 2 days
Property monitored by DSC method
