Polymer Technology Vulcanisation of raw rubber makes it Less elastic Plastic Tacky Soft Less elastic Plastic Tacky Soft ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness? Phosphorous Pine oil Carbon black Rosin Phosphorous Pine oil Carbon black Rosin ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ moulding is used for shaping of thermosetting plastics exclusively. Compression Extrusion Transfer Injection Compression Extrusion Transfer Injection ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals. Sulphuric acid Hydroflouric acid None of these Organic peroxides Sulphuric acid Hydroflouric acid None of these Organic peroxides ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C. 500 -20 250 50 500 -20 250 50 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thermosetting resins/polymers as compared to thermoplastic ones are Easily reshaped & reused More brittle Formed by addition polymerisation only Soluble in all organic solvents Easily reshaped & reused More brittle Formed by addition polymerisation only Soluble in all organic solvents ANSWER DOWNLOAD EXAMIANS APP
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