Explanation: The polymer transfer leads to the chain branching which makes it less crystalizable, weak in mechanical properties and less resistant to heat, solvents and chemicals.

Explanation: The commercial importance of polyvinyl butyral is its use as a safety glass interlayer, particularly because of its excellent clarity, toughness and exceptional adhesion o glass.

Explanation: polychloroprene is produced commercially by emulsion polymerization using soap such as rosin soap.

Explanation: Lubricants are used in the least amount among the other additives. Generally, 1-2 parts by weight of lubricants is used per 100 grams of polymer, while 30-100 and 2-5 parts by weight of plasticizers, fillers and cross-linking agents, respectively are used per 100 parts of polymer.

Explanation: The aromatic polyamide solutions show an initial increase in the viscosity with increase in volume fraction of polymer followed by a reversal in the trend and an abrupt decrease in viscosity when a critical volume fraction of polymer is exceeded.

Explanation: The reaction conditions in the polymerization of propylene are varied so as to favour the formation of isotactic polymers. Commercial polypropylene is 90-97% isotactic.

Explanation: Cationic polymerization generally occurs around -100ᵒC temperature. So, the rate and degree of polymerization drops sharply with rise in the temperature.

Explanation: Dodecyl mercaptan is used as a chain length regulator or chain transfer agent of high transfer constant to control the chain length of the polymer.

Explanation: The copolymer equation is relevant and applicable to radical, cationic and anionic systems, despite variations in values of reactivity ratios depending on the mode of chain propagation.

Explanation: The average lifetime of the radical is proportional to the rate of polymerization, which on the other hand is dependent on the frequency and intensity of incident light. Thus the average lifetime can get affected by all the given factors.