פולימרים

In the copolymerization of Monomer 1 (M1)-and monomer 2 (M2) the reactivity ratios are ri = 0.05, r2 = 0.01, and in another case Monomer 1 (M1)-and monomer 3 (M3) the reactivity ratios are r = 20.0, r3 = 0.05. What type of copolymers would expect after 10% monomer conversion into polymer for Mı reacting with M2 and M1 reacting with M3, respectively? (Choose from the following four possibilities)

1

מיין לפי

Which of the following polymers is most likely to have the highest glass transition points (Tg) (Choose from the following four possibilities)?

1

מיין לפי

If I want to synthesize a polymer to act as a compatibilizers for two non compatible polymers which would be the best type of polymer to make (Choose the best answer from the following four possibilities)?

1

מיין לפי

For mechanical properties measured by the tensile modulus (stress/strain) as a function of temperature which of the following statements is correct? (Choose from the following four possibilities)

1

מיין לפי

To study stereo regular placement of the groups in the polymer chains and how it affects the Tg and Tm which combination of methods would you chose? (Choose from the following four possibilities)

1

מיין לפי

Though both cellulose and starch are both made from glucose monomers they have very different mechanical and solubility properties. This difference is due to which of the following. (Choose from the following four possibilities)

1

מיין לפי

The synthesis of polypeptides by the Merrifield processes is much simpler than the synthesis polynucleotides for which of the following reasons: (Choose from the following four possibilities)

1

מיין לפי

Under what polymerization conditions can a polymer be synthesized where the ratio of the weight average to number average molecular weights (Mw/Mn) approaches 1.0. (Choose from the following four possibilities)

1

מיין לפי

A certain monomer is polymerized by benzoyl peroxide labeled in the benzene ring with carbon-14. Analysis by carbon counting shows that the polymer contains on average 1.9 labeled phenyl groups per molecule. Assuming no chain transfer occurred what does this indicate about the mechanism of termination? (Choose from r the following four possibilities)

1

מיין לפי

Stress vs. strain curves which are measured when the polymer material has been deformed at a constant rate may be characterized by which of the following characteristics? Which of the following statements is correct? (Choose from the following four possibilities)

1

מיין לפי

Discuss, Learn and be Happy דיון בשאלות

Which of the following polymers is most likely to have the highest glass transition points (Tg) (Choose from the following four possibilities)?

If I want to synthesize a polymer to act as a compatibilizers for two non compatible polymers which would be the best type of polymer to make (Choose the best answer from the following four possibilities)?

For mechanical properties measured by the tensile modulus (stress/strain) as a function of temperature which of the following statements is correct? (Choose from the following four possibilities)

To study stereo regular placement of the groups in the polymer chains and how it affects the Tg and Tm which combination of methods would you chose? (Choose from the following four possibilities)

Though both cellulose and starch are both made from glucose monomers they have very different mechanical and solubility properties. This difference is due to which of the following. (Choose from the following four possibilities)

The synthesis of polypeptides by the Merrifield processes is much simpler than the synthesis polynucleotides for which of the following reasons: (Choose from the following four possibilities)

Under what polymerization conditions can a polymer be synthesized where the ratio of the weight average to number average molecular weights (Mw/Mn) approaches 1.0. (Choose from the following four possibilities)

Stress vs. strain curves which are measured when the polymer material has been deformed at a constant rate may be characterized by which of the following characteristics? Which of the following statements is correct? (Choose from the following four possibilities)