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 SheetsResin 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)