Skip to ContentSkip to Navigation
About usNews and EventsNews articles

Synthesis of perfectly alternating carbon monoxide/olefin polyketones using a sulfonated diphosphine catalyst system

04 May 2009

PhD ceremony: N.S. Hammoud Hassan, 13.15 uur, Academiegebouw, Broerstraat 5, Groningen

Thesis: Synthesis of perfectly alternating carbon monoxide/olefin polyketones using a sulfonated diphosphine catalyst system

Promotor(s): prof. A.A. Broekhuis

Faculty: Mathematics and Natural Sciences

 

Perfectly alternating carbon monoxide/olefin polyketones are very interesting polymers. In this research the synthesis of PK-EP (ethylene, propylene/carbon monoxide polyketone) and PK-P (propylene/carbon monoxide polyketone) were studied. These polyketones are very interesting for many reasons: a) PK-EP and PK-P represent a type of polymers with very interesting engineering plastic properties, b) PK-EP and PK-P have unique chemical and physical properties, e.g. excellent mechanical properties, photodegradability, biodegradability and chemical resistance and c) new materials can be derived from PK-EP and PK-P by functionalizing the carbonyl groups. The objective of this research was the development of an efficient and recyclable catalyst system for the copolymerization of carbon monoxide and olefins. To achieve this goal the synthesis of these polyketones was studied in more detail using a number of palladium/diphosphine catalyst systems. By studying the reaction profile of the experiments a new phenomenon, so far not observed in PK-EP synthesis, was found. At a certain stage during the reaction the catalyst activity started to recover to reach approximately its initial activity. Another interesting aspect of the research was that the addition of certain salts to the polyketone reaction system had the capability of increasing the performance of the used catalyst system. The results showed that the addition of salts like Na2CO3, Li2SO4, FeSO4 and Na2SO4 to the reaction system, have the capacity of increasing the catalyst activity by 50%. The results showed that this salt enhancement effect is mainly induced by the anion of the salt.

 

 

Last modified:15 September 2017 3.38 p.m.
printView this page in: Nederlands

More news

  • 17 October 2019

    iGEM 2019: Team Groningen develops a biological QR-code

    The team developed a protocol to share delicate information via a biological QR-code.

  • 14 October 2019

    Demonstrating that it can be done

    Moniek Tromp and Marleen Kamperman share a lot in common. Both are young professors of chemistry at the Zernike Institute for Advanced Materials (ZIAM).Both joined the UG in 2018. Both are engaged in developing new materials. Both enjoy promoting science...

  • 11 October 2019

    Down Under with Top Dutch (update)

    After two years of hard work, the Groningen Top Dutch Solar Racing team has arrived in Australia. The team consists of students of the Hanze University of Applied Sciences, University of Groningen, and secondary vocational education (MBO) and is currently...