The tensile strength of polymers is represented by the image below.
To compute for tensile strength of polymers, three essential parameters are needed and these parameters are Tensile Strength at Infinite Weight (TS∞), Constant (A) and Mean Number Molecular Weight (M’n).
The formula for tensile strength of polymers:
TS = TS∞ – (A/M’n)
Where:
TS = Tensile Strength of Polymers
TS∞ = Tensile Strength at Infinite Weight
A = Constant
M’n = Mean Number Molecular Weight
Let’s solve an example;
Find the tensile strength of polymers when the tensile strength at infinite weight is 8, the constant is 4 and the mean number molecular weight is 2.
This implies that;
TS∞ = Tensile Strength at Infinite Weight = 8
A = Constant = 4
M’n = Mean Number Molecular Weight = 2
TS = (8) – (4/2)
TS = (8) – (2)
TS = 6
Therefore, the tensile strength of polymers is 6 Pa.
Calculating the Tensile Strength at Infinite Weight when the Tensile Strength of Polymers, Constant and the Mean Number Molecular Weight is Given.
TS∞ = TS – (A / M’n)
Where:
TS∞ = Tensile Strength at Infinite Weight
TS = Tensile Strength of Polymers
A = Constant
M’n = Mean Number Molecular Weight
Given an example;
Find the tensile strength at infinite weight when the tensile strength of polymers is 44, the constant is 80 and the mean number molecular weight is 10.
This implies that;
TS = Tensile Strength of Polymers = 44
A = Constant = 80
M’n = Mean Number Molecular Weight = 10
TS∞ = TS – (A / M’n)
TS∞ = 44 – (80 / 10)
TS∞ = 44 – 8
TS∞ = 36
Therefore, the tensile strength at infinite weight is 36.
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