How to identify different kind of polyketone (PK)?

05 February 2025 1 2K Report

PK is copolymer of CO, ethylene and propylene.

according to information from Internet, melting point of Polymers that alternately copolymerize carbon monoxide and ethylene is 260°C.

melting points of some normally used PK is 200-220°C.

however we find a kind of PK which melting point is 170°C.

the FT-IR spectrum of those PK are similar.

what cause the difference of melting point? the difference of copolymer monomer?

Edwin A. Murillo

The melting temperature depend on several factors: Interactions between functional groups (polars), molar mass, size and type of side groups, flexibility of the chains, etc.

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