Sulphur: From the Underworld to Thermoplastics

This month, polymer expert and technical blog author, Dr. Charlie Geddes, takes a view on sulphur and its uses in processing thermoplastics. more

29 Oct 2015 12:11 Materials Blog

Coping with weld lines

This month, polymer expert and technical blog author, Dr Charlie Geddes, looks at the causes and consequences of weld lines in injection moulding applications, offering expert advice on how best to deal with them. more

5 Aug 2015 12:01 Materials Blog

What determines friction between thermoplastic components?

This month, polymer expert and technical blog author, Dr Charlie Geddes, goes back to the classroom when it comes to friction. more

12 May 2015 12:29 Materials Blog

Will Styrenic thermoplastics evolve further to meet design demands?

Does design drive demand? This month, polymer expert and technical blog author, Dr Charlie Geddes, looks at whether styrenic thermoplastics will evolve further if demand warrants it. more

9 Feb 2015 16:21 Materials Blog

Creepy things can happen with long term loading of thermoplastics

This month, polymer expert and technical blog author, Dr Charlie Geddes, looks at how to avoid getting caught out by creep. more

30 Oct 2014 16:11 Materials Blog

The long and the short of fibre reinforcement of thermoplastics

This month, polymer expert and technical blog author, Dr Charlie Geddes, looks at fibre reinforcement in terms of properties, products and price more

8 Sep 2014 09:00 Materials Blog

Transparent ABS can be a clear winner

This month, polymer expert and technical blog author, Dr Charlie Geddes, ‘clears’ the myths about ABS and looks into how changing the chemical competition can affect its properties more

17 Jul 2014 09:00 Materials Blog

Colour your thinking on the optical properties of thermoplastics

This month, polymer expert and technical blog author, Dr Charlie Geddes, looks at what determines colour in thermoplastics. more

16 May 2014 16:23 Materials Blog

Where are engineering thermoplastics blends going?

This month, polymer expert and technical blog author, Dr Charlie Geddes, wonders where industry demand for increasingly versatile applications might take polymer blends. more

11 Apr 2014 12:00 Materials Blog

How can a thermoplastic elastomer be both thermoplastic and elastomer?

This month, polymer expert and technical blog author, Dr Charlie Geddes, takes a look at the unique properties and best uses of TPEs more

6 Mar 2014 00:00 Materials Blog

About this Blog

After a first degree in Chemistry at Aberdeen University, Charlie Geddes completed his PhD thesis on ‘Isotactic Polymers’ and spent the next 3 years at RAPRA researching PVC decomposition. After a further 3 years industrial R&D with a floor covering company, he joined Napier College in Edinburgh in 1970, where he was responsible for the polymer technology unit. After taking early retirement in 1996 he continued with part-time lecturing, short courses for industry and polymer consultancy. More recently he has been involved with the Council of the Scottish Plastics and Rubber Association as Communications Officer and, for the last 10 years, as Honorary Secretary. Dr Geddes is a regular columnist for Hardie Polymers and going forward we will be regularly publishing extracts from his informative and interesting blog.

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