1) A simple picture of a polymer chain in two dimensions is designed as a single long chain of linking N monomers of the length of a. Monomers are linked to together with chemical reaction. The monomers can be oriented in 4 directions given by +ai, +aſ,+aj and – aj A constant force is applied to expand the polymer along +x direction only. The energy of each monomer is given by x = -å. F where F = Fi is...
Polymer chains adopt different conformations in solutions. The size of a polymer chain can be described by the mean end-to-end distance (mean thread end spacing) and by the radius of gyration. a) Name the physical cause of why polymer chains adopt different conformations. Outline how the solvent affects the conformation and thus the size of the polymer chains. What is the parameter of the solvent that influences the size of polymer chains in a solvent? b) Describe the concept of...
The type of polymer formed by sequential addition of an alkene is a(n) A) addition polymer B) condensation polymer. C) substitutional polymer. D) combination polymer. E) natural polymer.
Consider the preparation of an addition polymer by a radical chain reaction Q. 2 (a) Give the polymers that can be formed from each of the following monomers and show the repeating unit in each case CI OMe (b) Describe the key steps in a radical chain growth polymerisation. What is "head to tail" addition and explain why it preferentially occurs (c) (d) Show the resonance stabilisation for the radical formed where possible for each of the monomers given in...
11. One-dimensional polymer, consider a polymer formed by connecting N disc-shaped molecules into a one-dimensional chain. Each molecule can align along either its long axis (of length 2a) or short axis (length a). The energy of the monomer aligned along its shorter axis is higher by e, that is, the total energy is H = 0, where U is the number of monomers standing up. (a) Calculate the partition function, Z(T, N), of the polymer. (b) Find the relative probabilities...
a)Name the four factors that must be present in the Chain of Infection: b)What type of Health Care Associated Infections (HAIs) are the direct result of an intervention with a physician?
Explain: Excluded volume effect of a linear polymer chain grafted on a surface
Select one type of polymer and discuss the reaction for it. Discuss the uses that polymer has. Has recycling made an impact on the environment?
4. Draw segment (can use (-----). type structure of the polymer obtained from each type of the following monomers. In each case, is it the result of a chain growth or a step growth type of polymerization? no answert a. CH=CH2 b. cech ice + IND with to c. ch=H-4H = CH2 CH3 Caneider the nalmer from nropene. In this context, what is meant by the terms a) atactic b)
Increasing the degree of polymer chain entanglement in a hydrogel would likely A. slow down release B. speed up rate of chain relaxation C. make the hydrogel less stable