On what characteristic of polymer the plasticising process effects at most?
Glass transition temperature
Hardness of polymer
Viscosity of polymer
all of the above
How Plastisizing effects the interval of temperature of processing?
Plasticizer decreases the processing interval of temperature
Plasticizer increases the processing interval of temperature
Plasticizer effects the processing interval of temperature in a parabolic way
Does not effect the temperature interval
Glass Transition temperature of PMMA-Dibutylftalat with 0% plasticiser is 110 C. what would be the said temperature when concentration goes from 0 to 5% of plasticiser
97C
82
76
51
What is the best method of adding plasticisers to polymers?
Swell the polymer in Plastisizer solution
Swell the polymer in the vapour of plasticizer solution
Mechanically mixed together at high temperature and pressed to tables
All of the above
Which of the following best describes the tensil strength behaviour of plastisized polymer
The tensil strenght of plasticized polymer Increases
The tensil strenght of plasticized polymer Decreases
The tensil strenght of a polymer does not change
The tensil strenght of plasticized polymer takes a parabolic characters
what are the required chemical characteristics of the plasticizer?
The plasticizer must be a liquid
The Plasticizer must be a Solid
The Plasticizer must have a high boiling points
1 and 3
Polymer-Plasticizer system is being seperated during exploitation. What would be the reason behind that?
Thermodynamically unstable system
Plasticizer unstable
Polymer unstable
2 and 3 together
The major two classes of polymers are crystaline polymers and amorphous polymers. In your opinion what would be the difference between those two classes?
Different in Tensile strength
Different in flow
Different in Structure
All together
Mechanism of Plasticizing is a function of
Clarity of Plactisizer
Polarity of polymer
Clarity of plasticizer
Compatibility of Polymer and Plasticizer
If a polymer and a plasticizer are compatible, this would be a result of
Polarity
Compatibility
High Compatibility
Good Clarity
Morphology of Crystaline polymer shows
Regularity
Irregularity
Low flow index
High flow index
according to the theroy of plasticizing of polymers The differrence between glass temperatrue of plasticized and unplasticized polymer is a function of
Polarity of polymer
Clarity of polymer
Compatibility of polymer
Volume of plasticizer
The following equation ?Tc=Kf is the plasticizing effect of
High polar polymer
Non Polar polymer
Low Polar polymer
2 and 3 t
Please what would ?Tc stands for in this ?Tc =Kf
Change in Temperature of plasticizer
Change in Temperature of polymer
Change in glass temperature of plasticized polymer
2 and 3
Please what would f stands for in this ?Tc =Kf?
Molarity of plasticizer
Polarity of plasticizer
Volume of Plasticizer
Volume of Plasticizer