How to select additives for high-temperature plastics?

Last update on Apr 22, 2026
Additives used with commodity polymers cannot give the best results with high-temperature polymers. This is because of the lack of high-temperature stability of these traditional additives. This fact has led to the development of specific additives that can be used with high-temperature polymers.
 
In this guide, we will help you select from the three main high heat additives: antioxidants, flame retardants, and processing aids used with high heat polymers. Uncover the features they offer in several high-temperature polymers.

Need of additives for high heat polymers

Mass production markets, such as aerospace, automotive and electronics need an increasing balance of thermal, mechanical, electrical, optical and tribological properties for high-performance parts. Some specialty polymers used in these markets offer peak or long-time thermal resistance exceeding 250°C. To perform optimally, these polymers often need certain additives. It is these materials that help bring the superior properties of the polymers. 

The selection of additives depends on:
 

  • The type of polymers they will be added to, or
  • The application for which they will be used


Appropriate selection helps develop value-added plastics with improved durability as well as other advantages. Additive can be particularly useful to improve the performance of high-temperature polymers. 

The three of the most common types used with high-temperature polymers are:
 

 

Select from three of the most common types used with high-temperature polymers on our platform, request samples, and download technical data.

 


 

Let's discuss the feature provided by each of these additives to high-temperature polymers in detail...
 

Selecting the right high heat additives

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