Polymer Technology Molecular weight of polymers are in the range of 10⁷-10⁹ 10²-10⁷ 10⁹-10¹¹ 10 to 10³ 10⁷-10⁹ 10²-10⁷ 10⁹-10¹¹ 10 to 10³ ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Epoxy resins (i.e., epoxide polymers) Use emulsion polymerisation methods Contain an epoxy group ( ##### ) at the ends of the polymer Are cross-linked polymers only Are made by addition polymerisation reaction only Use emulsion polymerisation methods Contain an epoxy group ( ##### ) at the ends of the polymer Are cross-linked polymers only Are made by addition polymerisation reaction only ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polypropylene compared to polythene is All of these Harder Lighter Stronger All of these Harder Lighter Stronger ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Unbreakable crockeries are made from __________ polymers. Polystyrene Melamine Polyurathane Polystyrene Polystyrene Melamine Polyurathane Polystyrene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature. Polypropylene Polyester Nylon Polyacrylonitrile Polypropylene Polyester Nylon Polyacrylonitrile ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to Reduce the time of vulcanisation and quantity of vulcanising agent Increase its viscosity Reduce its viscosity to permit easier processing Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce the time of vulcanisation and quantity of vulcanising agent Increase its viscosity Reduce its viscosity to permit easier processing Protect rubber goods from attack by oxygen & ozone present in the atmosphere ANSWER DOWNLOAD EXAMIANS APP
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