What type of polymer is poly trimethylene carbonate?

PTMC is a hydrophobic non-crystalline polymer with a glass transition temperature (Tg) of around −20 °C. Therefore, PTMC is usually used as a soft material in a scaffold application for soft tissue regeneration and as a hydrophobic segment of amphiphilic block copolymers for drug delivery.

Is carbonate a monomer?

The carbonates obtained were used as monomers in transesterification with diols and diphenols leading to the formation of polycarbonates.

What is polymer carbonate?

Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed.

Is this a chain growth polymer or a step growth polymer?

Step-growth (e.g. condensation) versus Chain-Growth (e.g. free radical) Polymerization

Step-Growth Chain-Growth
All molecules present (monomer, oligomer, polymer) can react with any other molecule. During propagation, only monomers react to the active site at the end of the growing chain.

Which of the following monomers used for synthesis of polycarbonates?

The polycarbonate most used is manufactured by condensation polymerization between bisphenol A and either carbonyl chloride or diphenyl carbonate.

What are polycarbonates made of?

Polycarbonate is a polyester made by the condensation of carbonic acid HO–CO–OH and bisphenol A HO–(C6H6)–C(CH3)2–(C6H6)–OH.

What is difference between chain growth and step growth polymerization?

The main difference between chain growth polymerization and step growth polymerization is that chain growth polymerization has a growth a polymer chain at its ends whereas step growth polymerization has a combination of oligomers to form a polymer chain.

Is oligomer a monomer?

An oligomer is a molecule that consists of a few monomer units. “Macromolecule” is used for individual molecules of high molecular weight and “polymer” is used to denote a substance composed of macromolecules.

Which of the following are bifunctional monomers?

Ethylene, styrene, and ethylene glycol are examples of bifunctional monomers, while glycerin and divinyl benzene are both polyfunctional.

How are polycarbonates made?

Polycarbonate is produced via chemical reactions between bisphenol A (BPA) and phosgene COCl2. It was first patented in 1953 by Hermann Schnell at Bayer under the name Melron (later changed to Makloron). Today, polycarbonate is made in a similar way through either injection moulding or extrusion.

Which catalyst is used in coordination polymerization?

Ziegler-Natta
HDPE is produced by coordination polymerisation using a catalyst, usually Ziegler-Natta (ZN).

What is the monomer of Dacron?

The monomeric units involved in the production of Dacron are ethylene glycol and terephthalic acid.