Explanation
PHBV find its applications in controlled release of drugs, medical implants and repairs, specialty packaging, orthopedic devices and manufacturing bottles for consumer goods. It is also biodegradable which can be used as an alternative to non biodegradable plastics.
About 50% of car tires are made from various types of styrene-butadiene rubber (SBR). The styrene-butadiene ratio influences the properties of the polymer, with high styrene content, the rubbers are harder and less rubbery. SBR is not to be confused with a thermoplastic elastomer made from the same monomers, styrene-butadiene block copolymer.
The most suitable property for molecular weight determination of polymers is osmotic pressure.
Different types of polymers have different intermolecular forces of attraction. Elastomer or rubbers have the weakest while fibers have the strongest intermolecular forces of attraction. Plastics have intermediate intermolecular forces of attraction. Hence, the increasing order of the intermolecular forces of the given polymers is as follows: Buna – S (B) < polythene (C) < Nylon 6, 6 (A)
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