Consider the expression for reciprocal of average degree of polymerization, when styrene is polymerized with t-butyl hydroperoxide at 60 C-1/Xn = 0.6*10-4+10.0Rp+1.73*104 Rp2

nCalculate the value of initiator transfer constant, if the monomer concentration is 8.35 mol/l and the value of the term kp2 fkd/kt= 3.29*10-9.

For polymerization of vinyl acetate with hydrogen peroxide at 60 C, the reciprocal of number average degree of polymerization is given by,1/Xn = 1.75*10-4 + 14.0Rp + 5.4*104Rp2

nWhat is the value of monomer transfer constant?

What is the effect of polymer transfer on the polymer product formed by radical polymerization?

tbecomes less resistant to foreign agents

Explore topic-wise MCQs in Polymer Engineering.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Polymer Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.	The transfer constant to the solvent for polymerization of of styrene in toluene at 60 C is 0.12510^-5. How much dilution is required to decrease the molecular weight by 4 times when 1/X_n0 is 3.510^-4?
A.	t75
B.	t42
C.	t84
D.	t7
Answer» D. t7

Discussion

2.	Consider the expression for reciprocal of average degree of polymerization, when styrene is polymerized with t-butyl hydroperoxide at 60 C- 1/X_n = 0.610^-4+10.0R_p+1.7310⁴ R_p²
A.	nCalculate the value of initiator transfer constant, if the monomer concentration is 8.35 mol/l and the value of the term k<sub>p</sub><sup>2</sup> fk<sub>d</sub>/k<sub>t</sub>= 3.29*10<sup>-9</sup>.
B.	t0.035
C.	t0.07
D.	t0.063
E.	t0.0175
Answer» B. t0.035

Discussion

3.	For polymerization of vinyl acetate with hydrogen peroxide at 60 C, the reciprocal of number average degree of polymerization is given by, 1/X_n = 1.7510^-4 + 14.0R_p + 5.410⁴R_p²
A.	nWhat is the value of monomer transfer constant?
B.	t1.75*10<sup>-4</sup>
C.	t0.875*10<sup>-4</sup>
D.	t5.4*10<sup>4</sup>
E.	t14
Answer» B. t1.75*10<sup>-4</sup>

Discussion

4.	What is the effect of polymer transfer on the polymer product formed by radical polymerization?
A.	tbecomes less crystallizable
B.	tbecomes mechanically weak
C.	tbecomes less resistant to foreign agents
D.	tall of the mentioned
Answer» E.

Discussion

5.	How does the value of solvent transfer constant, C_S vary in the solvents with increasing substitution at the -carbon?
A.	tincreases
B.	tdecreases
C.	tconstant
D.	tnone of the mentioned
Answer» B. tdecreases

Discussion

6.	What is the value of intercept and slope of the straight line, when the term [1/X_n [(y+2)/(y+1)](k_t/k_p²)(R_p/[M]²)] is plotted against the ratio [I]/[M], when both monomer and initiator transfer are considered?
A.	tC<sub>M</sub>, C<sub>I</sub>
B.	tC<sub>I</sub>, C<sub>M</sub>
C.	t0, C<sub>I</sub>
D.	tnone of the mentioned
Answer» B. tC<sub>I</sub>, C<sub>M</sub>

Discussion

Explore topic-wise MCQs in Polymer Engineering.

The transfer constant to the solvent for polymerization of of styrene in toluene at 60 C is 0.125*10-5. How much dilution is required to decrease the molecular weight by 4 times when 1/Xn0 is 3.5*10-4?

Consider the expression for reciprocal of average degree of polymerization, when styrene is polymerized with t-butyl hydroperoxide at 60 C-1/Xn = 0.6*10-4+10.0Rp+1.73*104 Rp2

For polymerization of vinyl acetate with hydrogen peroxide at 60 C, the reciprocal of number average degree of polymerization is given by,1/Xn = 1.75*10-4 + 14.0Rp + 5.4*104Rp2

What is the effect of polymer transfer on the polymer product formed by radical polymerization?

How does the value of solvent transfer constant, CS vary in the solvents with increasing substitution at the -carbon?

What is the value of intercept and slope of the straight line, when the term [1/Xn [(y+2)/(y+1)](kt/kp2)(Rp/[M]2)] is plotted against the ratio [I]/[M], when both monomer and initiator transfer are considered?

The transfer constant to the solvent for polymerization of of styrene in toluene at 60 C is 0.12510^-5. How much dilution is required to decrease the molecular weight by 4 times when 1/X_n0 is 3.510^-4?

Consider the expression for reciprocal of average degree of polymerization, when styrene is polymerized with t-butyl hydroperoxide at 60 C-
1/X_n = 0.610^-4+10.0R_p+1.7310⁴ R_p²

For polymerization of vinyl acetate with hydrogen peroxide at 60 C, the reciprocal of number average degree of polymerization is given by,
1/X_n = 1.7510^-4 + 14.0R_p + 5.410⁴R_p²

How does the value of solvent transfer constant, C_S vary in the solvents with increasing substitution at the -carbon?

What is the value of intercept and slope of the straight line, when the term [1/X_n [(y+2)/(y+1)](k_t/k_p²)(R_p/[M]²)] is plotted against the ratio [I]/[M], when both monomer and initiator transfer are considered?