Semi-Crystalline Polymers

Crystalline PolymerHigh temperature materials are divided into two main categories—semi-crystalline and amorphous—based on their difference in molecular structure.

Semi-crystalline materials have a highly ordered molecular structure with sharp melt points. They do not gradually soften with a temperature increase, instead, semi-crystalline materials remain solid until a given quantity of heat is absorbed and then rapidly change into a low viscosity liquid.

These materials are anistropic in flow, shrinking less in the direction of flow vs. transverse to flow. They have excellent chemical resistance. Semi-crystallines exhibit substantial improvement in their HDTs when reinforced and retain useful levels of strength and stiffness well beyond their glass transition temperature (Tg).

RTP Company modifies the following semi-crystalline thermoplastic resins to meet the particular demands of your high temperature application

Product Data Sheets Resin Description
RTP 1300 Series Polyphenylene Sulfide (PPS)
RTP 2200 Series Polyetheretherketone (PEEK)
RTP 2200 A Series Polyetherketone (PEK)
RTP 4000 Series Polyphthalamide (PPA)
RTP 4100 Series Polyetherketoneketone (PEKK)
RTP 4200 Series Thermoplastic Polyimide (TPI)
RTP 4400 Series High Temperature Nylon (HTN)