WorksheetsChapter 2: Thermoplastic Material - PVC
Total questions: 10
Worksheet time: 6mins
Identify chemical structure for PVC
C2H4
C2H4Cl
C2H3Cl
CH4Cl
PVC form polymerization by.....?
Evaporation
Addition
Chemical Reaction
Condensation
The............atoms prevents close packing of the polymer.
Carbon
Hydrogen
Chlorine
The .............. is important to produce two types of PVC
Themal sensitivity
Solvent sensitivity
Electronegativity of chlorine
State two type of modified PVC
Rigid PVC
Brittle PVC
Vinyl PVC
Hard PVC
Identify the main reason cause repulsion in PVC and reduce flexibility of polymers chain.
Size of chlorine atom
Large negative chlorine atom
Reaction carbon and chlorine in polymer
Long chain of PVC
The...............tend to cause other nearby Hydrogen and Chlorine atoms to combine, to accelerating the process to occur.
Free Radical
Decomposition Process
Addition Process
When.......is added to PVC, the plastic become more flexible
Chlorine
Plasticizer
Solvent
The physical properties of a plasticized PVC make glass transition temperature of material become......
increase
reduce
constant
stable
Advantages to plasticizer are
inexpensive and easy to add
good flexibilty
not toxic
not extractable by sunlight
