Polystyrene and Butene
Not what you're looking for?
1. POYSTYRENE: The monomer structure of polystyrene is shown attached.
a) Would you expect polystyrene to be a stiff or a pliable polymer?
b) What kind of synthesis is used in the production of polystyrene from styrene monomers? Addition polymerization, condensation polymerizaton or anionic polymerization?
c) Calculate the degree of polymerization n of polystyrene with a molecular weight of 3.091 x 10^6 g/mol.
2. BUTENE: Butene H2C=CH-CH2-CH3 can be reacted to form isotactic polybutene (PB).
a) Would you expect isotactic polybutene to melt at a higher or lower temperature than atactic polybutene f the same molecular weight?
b) Is isotatic polybutene a thermoplastic or thermoset?
c) What is the value of the degree of polymerization n of isotactic PB with a molecular weigh of 3.091x10^5 g/mol?
3. CHIRALITY: One chirality of CH3CHClCOOH is show attached. Identify the images that exhibit the opposite chirality.
4. GLASS TRANSITION AND MECHANICAL PROPERTIES: Describe how the mechanical properties of a purely amorphous cross-linked polymer above its glass transition temperature differ from the mechanical properties of a purely amorphous cross-linked polymer below its glass transition temperature. Consider properties such as Young's modulus and as well as whether you would expect the polymer to undergo plastic flow or brittle fracture.
Purchase this Solution
Solution Summary
The expert examines the monomer structures of polystyrene and butene. The degree of polymerization n of polystyrene with a molecular weight is determined.
Solution Preview
1. A. Stiff B. Addition C. 3091000/104.15 = 29678
2. a. Higher T b. Thermoplastic c. 5520 (309100 / 56)
3. Molecule is S. Opposite chirality R is top right and ...
Purchase this Solution
Free BrainMass Quizzes
Thermochemistry
The quiz helps in revising basic concepts about thermochemistry.
Match Elements with their Symbols
Elements are provided: choose the matching one- or two-letter symbol for each element.
Organic Chemistry Naming: Alkanes
This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.
General Chemistry - Classification of Matter
This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.
Functional groups in Organic Chemistry
You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.