Write whether the following statements are true or false. plastic are inorganic polymers that show plasticity *
Answers
Explanation:
False
Plastics are synthetic or semi organic polymers made from oil or petroleum through the use of chemicals and condensation to include molecular bonding
Answer:
False. (Plastics are organic polymers that show plasticity)
Explanation:
An inorganic polymer is a polymer with a skeletal structure that does not include carbon atoms in the backbone.
Polymers containing inorganic and organic components are sometimes called hybrid polymers, and most so-called inorganic polymers are hybrid polymers. One of the best known examples is polydimethylsiloxane, otherwise known commonly as silicone rubber. Inorganic polymers offer some properties not found in organic materials including low-temperature flexibility, electrical conductivity, and nonflammability.
The term inorganic polymer refers generally to one-dimensional polymers, rather than to heavily crosslinked materials such as silicate minerals. Inorganic polymers with tunable or responsive properties are sometimes called smart inorganic polymers. A special class of inorganic polymers are geopolymers, which may be anthropogenic or naturally occurring.
Heterochain polymers have more than one type of atom in the main chain. Typically two types of atoms alternate along the main chain. Of great commercial interest are the polysiloxanes, where the main chain features Si and O centers: −Si−O−Si−O−. Each Si center has two substituents, usually methyl or phenyl. Examples include polydimethylsiloxane (PDMS, (Me2SiO)n), polymethylhydrosiloxane (PMHS (MeSi(H)O)n) and polydiphenylsiloxane (Ph2SiO)n).[5] Related to the siloxanes are the polysilazanes. These materials have the backbone formula −Si−N−Si−N−. One example is perhydridopolysilazane PHPS. Such materials are of academic interest.
P-based
A related family of well studied inorganic polymers are the polyphosphazenes. They feature the backbone −P−N−P−N−. With two substituents on phosphorus, they are structurally similar related to the polysiloxanes. Such materials are generated by ring-opening polymerization of hexachlorophosphazene followed by substitution of the P−Cl groups by alkoxide. Such materials find specialized applications as elastomers.
Polyphosphazene general structure
General structure of polyphosphazenes. Gray spheres represent any organic or inorganic group.
B-based
Boron–nitrogen polymers feature −B−N−B−N− backbones. Examples are polyborazylenes,[7] polyaminoboranes.
S-based
The polythiazyls have the backbone −S−N−S−N−. Unlike most inorganic polymers, these materials lack substituents on the main chain atoms. Such materials exhibit high electrical conductivity, a finding that attracted much attention during the era when polyacetylene was discovered. It is superconducting below 0.26 K.
Ionomers
Usually not classified with charge-neutral inorganic polymers are ionomers. Phosphorus–oxygen and boron-oxide polymers include the polyphosphates and polyborates.
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