Electronics Protection: Why Do Rubber or Plastic Feet Turn Into Sticky Goo Over Time?

The phenomenon of rubber or plastic feet on electronics turning into a sticky goo over time is a common issue that can significantly impact the functionality and appearance of devices. This article delves into the key reasons behind this issue, including material composition, environmental factors, chemical reactions, and aging. Additionally, we will explore how ambient ozone and people grease can further contribute to the degradation process.

1. Material Composition and Degradation Process

Many rubber feet found on electronics are made from synthetic rubbers or plastics such as PVC (Polyvinyl Chloride) or polyurethane. These materials can break down over time due to the breakdown of their plasticizers. Plasticizers are added to make the materials more flexible, but they can migrate out of the material over time, leading to a sticky residue. This can happen even without direct exposure to chemicals or extreme conditions.

2. Environmental Factors and Degradation

Electronics often generate heat during operation, and if they are stored in hot or humid environments, this can accelerate the degradation process of the rubber feet. Exposure to UV light, heat, and humidity can cause the rubber to break down more quickly, leading to the formation of a sticky residue.

3. Chemical Reactions and Environmental Adversities

The materials in rubber feet can undergo chemical reactions with environmental substances such as oils, dust, and cleaning agents. These reactions can further degrade the rubber and contribute to its stickiness. Additionally, ambient ozone and people grease can have a significant impact:

Scissioning of molecules makes them shorter chains, making them stickier. Crosslinking of molecules makes them stiffer and more brittle, leading to further degradation. Hydrolysis, a type of chemical degradation by water, can also occur if the rubber feet are exposed to moisture and in the presence of an acid or alkali catalyst.

These processes can accelerate the breakdown of the rubber, leading to a sticky residue that can affect the overall performance and appearance of the electronic device.

4. Aging and Manufacturing Quality

As rubber ages, it can lose its structural integrity. The molecular structure can break down, leading to a loss of elasticity and an increase in tackiness. This aging process is exacerbated by lower-quality materials and manufacturing processes. High-quality materials and meticulous manufacturing processes can help mitigate these effects, but over time, even well-made parts can degrade.

5. Mitigation Strategies

To mitigate this issue, it is often recommended to keep electronics in controlled environments, avoiding exposure to harsh chemicals, and regularly cleaning any sticky residues with appropriate cleaners. Storing devices in cool, dry locations away from direct sunlight can help slow down the degradation process.

Understanding the causes of rubber and plastic feet turning into sticky goo can help in maintaining the longevity and functionality of electronic devices. By implementing proper storage and maintenance practices, users can minimize the impact of environmental factors and chemical reactions, ensuring their devices remain in optimal condition over time.