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What Does a Moulder Understand by the Term ‘Diesel Burning?’

In the early days, plastics moulders tended to apply descriptive terms to moulding faults, but these terms do not accurately indicate the root cause.

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Making the Most of Impact Testing

Falling weight impact tests can yield much more relevant information than single-point impact testing; however, they come with their own challenges. 

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Do Izod and Charpy Make the Appropriate Impact?

Cracking of plastics components under impact was a major blow to the plastics industry in the early days. Today it is still a challenge for designers to select thermoplastics that will stand up to impact […]

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Low-Cost Identification of Plastics

Low-cost identification of plastics is certainly desirable, but identifying an unknown plastic material can be an expensive exercise if you submit it for full chemical analysis.

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Thermoplastics and UV: Friend or Foe?

Radiation in the ultraviolet region of the spectrum is a bit of a mixed blessing for polymers.

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How to ‘Crystallise’ your Thoughts on Selecting a Thermoplastic

When faced with selecting a thermoplastic for a new component, I find it helpful to view potential materials in two groups …. amorphous (non-crystalline) and crystalline (strictly speaking semi-crystalline because it is unusual to get […]

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Is Solvent Resistance Predictable with Polymers?

To assess solvent resistance, first consider solvents spread out on a polarity scale. Non-polar solvents are at one end, such as paraffin, petrol and diesel. At the other ‘highly polar’ end we find alcohols and […]

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Sulphur: From the Underworld to Thermoplastics

In 1839, by inserting sulphur atoms as bridges between polymer chains, Charles Goodyear transformed Natural Rubber from an interesting curiosity into a superb engineering material that has had a huge impact on society.

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Can You Modify a Polymer Grade Safely?

One of the exciting attributes of polymers is that the properties of any polymer can be modified by tinkering with the basic molecular structure or incorporating a range of additives.  However, you have to be […]

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What do we Mean by the Heat Resistance of Thermoplastics?

In some applications heat resistance can mean the material’s ability to carry out its intended function at elevated temperatures for short periods.

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