Question 24 Which these is Thermoplastie 25 Fill the Blank Those which soften on heating and then harden again on cooling These are called ... ......... polymers because they keep their plastie properties These polymer molecules consist of long chains which have only weakbonds between the chains The bonds between the chains are so weak that they can be broken when 24 Which these is Thermoplastie 25 Fill the Blank Those which soften on heating and then harden again on cooling These are called ... ......... polymers because they keep their plastie properties These polymer molecules consist of long chains which have only weakbonds between the chains The bonds between the chains are so weak that they can be broken when the plastie is heated The chains can then move around to form a different shape The weak bends reform when it is cooled and the thermoplastic material keeps its new shape thermoplastic 26 Fill the Blank Those which never soften once they have been moulded These are called ... polymers because once set into a shape, that shape cannot be altered These polymer molecules consist of long chains which have many strong chemical bonds between them The bonds between the chains are strong that they cannot be broken when the plastie is heated This means that the thermostting material always keeps its shape thermosetting 27. How Do you call these chemical names abbreviation) Polyvinyl chloride .......PVC): electrical cables cover, credit cards, car instrument panels Polystyrenet disposablespoons, forks. Styrofoam Acrylics ....... PMMA polymethyl methacrylate paints, fake fur, plexiglass Polyamide (som textiles and fabrics, ears, bushing and washers, bearings PET .....posthene terephthalate bottles for acidic foods lik e food trans PTFE ... polytetrafluoroethylene): non-stick coating. Gore-Te r anca dental floss What is the compressie melding What is the same 29. What is the same of this mach What do you call this process ce - 3. Match the correct to the shapes letter below 1-Linear, 2-Cross Linked, 3 - Network, Breached Une What is the proep s e for the shapes below 37. The response of polymer to mechanical forces at elevated temperature s molecular structure a) Fabe by True trated to its dominant 38. One classification of polymers is according to its behavior and rising temperature. Thermoplasties and Therments are the categories. a) Fate by True 9. Most thermoplasties are high-molecular weight pehmen whose chains associate through weak Van der Waals forces (polyethylene stronger dipol-dipole interactions and hydrogen bonding ayla by True 4. the most important Mechanical Properties of polymers are Al Fale 41. What type of test is this 40. the most important Mechanical Properties of polymers are... 41. What type of test is this 2.Young's Mad This is the slope of the each material constant, a s car parties of the stress-strain cene, w ally specific to 43. Yield Strength This is the value ofres at the yield point, calculated by plotting young's modulus ata specified percent of offset (usually offer 0.2%)...... Ultimate Tensile Strength: This is the highest value of stress on the stresstrainer Perea Elongation: This is the change in prape length divided by the original progeth as 16. Typical t r ain behavior for metal is show the propertie s and the yield strength determined in the rain fe thed where there is the ble plastie deformation is the gradal transition ion. .. . .....

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solve question 24-46 please