In 1970, chemist Alan MacDiarmid heated a plastic film and unexpectedly discovered conductive plastic

For many years, plastic has been a dependable part of daily life.

It packages our foods, acts as a substitute for kitchenware, and saves our lives because it forms a protective layer around electric wires.

Due to the inability of conventional plastics to conduct electricity, it has been classified in materials science as an excellent insulator.

However, a laboratory experiment in the 1970s challenged this basic assumption in materials science by showing that plastic can act like a metal.

What is notable about this discovery is that the scientist behind it was New Zealand-born Alan MacDiarmid and his team.

In this experiment, the team observed a surprising reaction while working on a polymer, which is a long chain of repeated molecules.

Instead of resisting an electric current, the modified plastic film conducted electricity easily.

When the laws of chemistry went bust The discovery was made gradually but it finally received global recognition through an outstanding scientific publication.

According to a retrospective piece written by the Royal Society of Chemistry, the pivotal event gained official recognition in a world-renowned 1977 report on halogen derivatives of polyacetylene.

This outstanding work was conducted through the collaboration of a group of exceptional scientists who include Hideki Shirakawa, Alan MacDiarmid, and Alan Heeger.

According to the same retrospective article, the paper became one of the best-known papers in polymer science because it answered a long-standing question in the field.

The team showed that, under the right conditions, plastic could do more than act as an insulator.

The researchers created a new pathway for electrical current by introducing halogen vapors to the polymer.

From a mere mistake to a breakthrough in science To get an idea of why this discovery is so impressive, it is worth taking a look at the process of production of ordinary plastic.

Ordinary plastics do not allow electrons to move through them because they hold their electrons tightly.

This discovery changed that understanding.

With chemical modifications, the scientists formed a special type of chemical bond within the molecule.

This structure allowed electrons to move freely along the polymer chain.

They were no longer restricted by the molecular structure and could move like electrons in copper or iron wire.

Transforming the world of modern electronics A simple laboratory accident helped launch a major technological field.

These days, we use these materials even more widely than before.

As it is reported in the article published in Royal Society of Chemistry review, nowadays there are lots of various applications of conductive polymers in modern electronics.

The 2024 review notes that the materials are valuable because they combine several useful properties.

These materials combine the excellent electrical conductivity of metal with the flexibility of conventional plastic.

This allows designers to create electronic devices that can bend, fold, and twist without breaking.

A discovery bigger than its first moment In the case of the discovery made by Alan MacDiarmid and his team, the importance of the flexibility of science becomes evident.

What began as an insulating material has become a foundation for future clean energy technologies and wearable electronics.

The example proves that technological revolutions happen when scientists are ready to doubt the simplest facts of their discipline.

To conclude, the material became much more than just a laboratory curiosity.

The plastic film, once an insulator, became a key component of organic electronics.

The discovery opened new possibilities for scientists and showed that even seemingly immutable rules of physics can be challenged.