In chain growth polymerization the monomer is unsaturated molecule.

Please explain the following observation: For chain-growth polymerization, the concentration of the monomers follows a slow mono-exponential decrease. For step-growth polymerization, the monomer concentration follows a very rapid bi-exponential decrease.
Polymer Chemistry:
1. (20pt) This question is concerned with a comparison between step and chain polymerization. A. Indicate which of these statements is appropriate to step and which to chain processes: a. High MW obtained initially and continuously. b. High MW at high conversion. 2. a. Monomer concentration decreases rapidly in early stages of reaction. b. Monomer concentration decreases continuously throughout reaction. 3. a. Reaction mixture contains only high polymer, monomer and reactive species. b. Reaction mixture contains a range...
A chain growth polymerization is conducted using 1.50 mmol of monomer, 0.0005 mmol of catalyst, and 0.0025 mmol of initiator. Calculate the number of repeat units in each polymer chain.
Compare and contrast both the reaction scheme presented Figure 3 for the chain growth and step growth polymerization. (8 marks) Chain-growth polymerization Average Molecular Weight Step-growth 100 50 % Concentration Figure 3
Question 3 1 pts Which of the following monomers can undergo polymerization either by chain-growth or step-growth? NH2 G COOH o COOH COOH o F and HO OH CI
Calculate and plot the number and weight distributions of x-mers found in a step-growth polymerization for conversions, p, of 0.90, 0.95, and 0.99 for x = 1 to 300. Comment on what species predominate by weight and by number. (Hint: You may want to use excel, Mathematica, or Matlab.)
Hello, this is for a design of experiment class. I need to Plot 1/(mean MW) Versus 1/(mean Tg). Can someone do this for me in excel? Mw= Molecular Weight Tg= Glass Transition temperature Mean MW (kDa) 4.8 9.3 14.0 19.5 25.5 36.7 66.4 88.5 111.8 144.4 176.0 Mean Tg (K) 349.1 360.0 364.3 366.9 368.1 369.9 371.2 371.7 371.6 372.3 372.3
Draw a mech. For polymerization using butylithium as initiator.
Show the initiation one chain propagation step and use H+ to
terminate growth.
(b) Which of the following monomers can be polymerized by step-growth and which ones by chain- growth polymerization? ( mark each) CH3 (iH2N- (CH 2) 6 NH 2 CH3 t) (iii) (iv) CH-CH2
calculate the Mn
Mw
PDI
Which of the following has the highest average degree of polymerization (DP) with M= 254000 s mol - جون سيدة و #C - م ور مس ا دبستان در