DSM Engineering Plastics

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PPS - Xytron

Poly(p-phenylene sulfide) (PPS) is a polymer made up of sulfur atoms and phenylene rings. It is a semi-crystalline polymer with a melting point of about 280°C. The highly stable chemical bonds of its molecular structure brings PPS below key strengths:

 

  • Heat aging performance up to 240 °C
  • Chemical resistance at elevated temperature
  • Dimensional stability

Explore Xytron

Xytron offers extreme good chemical resistance, dimensional stability, intrinsically flame retardancy, high stiffness up to Glass Transition Point (90 °C), Continuous Use Temperature (CUT) of 240-260 °C and a melting point of 280 °C. All outstanding properties contributing to excellent performance for many different applications. Xytron is well suited for a broad range of Automotive, E&E and Specialized Industries applications.

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Xytron portfolio overview

Hydrolysis resistance

This group of materials fit best for applications that are exposed to higher heat and need to maintain dimensional stability while being subjected to harsh chemicals.  

Food contact and drinking water

This class of material has global drinking water approvals including NSF, KTW, WRAS, ACS and also compliant with FDA for food contact applications. (Hot water resistance up to 95C or higher (pressured)/ broad processing window / lower flash at high flowability. 

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High impact

This class of materials enables applications that requires high impact resistance or a frequent temperature changes, by solving the brittleness problem of normal PPS grades. 

Properties

Hydrolysis resistance

It’s well-known that PPS polymer and glass are both quite good at hydrolysis resistance. There is limited reduction even after 3000hrs aging at 135°C. But the interface of glass and PPS polymer is the weak point for glass reinforced PPS compound during hydrolysis process. Thanks to the good bonding technology, DSM G4080HR is able to outperform competitor’s material. After 3000hrs aging at 135°C, the retention strength is still around 80% of its initial value, which is double of that of competitor material.

 

 

From the AFM pictures, it can be observed that both G4080HR and competitor sample have good bonding between PPS polymer and glass before water/glycol aging test. After 3000hrs water/glycol aging, an obvious clearance can be observed in the interface of competitor sample, while it’s almost invisible for G4080HR. It explains well that G4080HR shows higher retention strength than competitor sample after aging.

Long term heat aging performance

PPS shows extremely good heat aging performance, due to its highly stable chemical bonds. The phenylene rings will form carbon layer during the initial aging process. Later on, it will protect inner layer from oxidizing. It can easily be validated by below heat aging curve for G4010T. It’s observed that only limited reduction of Tensile strength is observed at 150°C, while a reduction to certain extent at 230°C. Even after aging at 230°C for 6000hrs, Xytron G4010T still shows >60% tensile strength retention.  

Dimension stability

Since there is no hydrophilic group in PPS chemical structure, PPS shows almost ZERO moisture absorption. Even if the specimen of G4020DW-FC is soaked into 85°C water for 72hrs, the absorbed water is only 0.2%, which results in dimension increase by about 0.03% in flow direction and 0.05% in transverse direction.

Creep resistance at elevated temperature

Due to the high stiffness of PPS, Xytron shows very good creep performance even at elevated temperature. From below creep curves of G4024T, it’s seen that there is limited elongation change for 1000 hrs with loading 20Mpa at room temperature. Even if at 150°C, elongation is only 0.6% after 1000hrs with loading 20Mpa.

Most popular Xytron grades

view all xytron grades
view all xytron grades

Featured applications

Thermostat housing

Automotive | null

Best long term performance in water/glycol; Outstanding surface finish; Reduced production costs due to early demolding (short cycle time)

Alternator bridges

Automotive | null

Easy processing;Problem-free production; Broadest processing window

Engine block heater for electric generators

Energy | null

Xytron™ offers long term high temperature resistance&hydrolysis resistance; Xytron™ is DSM's technical expertise and effective technical and commercial communication; Xytron™ also allows for easy processing

Automotive e-motor Bobbins

Automotive | e-Drivetrain | HV E-motors

Stanyl® PA46 allows for reliable solutions due to a high temperature resistance (UL1446 class H certified) and creep resistance at elevated temperatures, high toughness levels and good electrical insulation properties; Stanyl® PA46 allows for cost effective solutions due to a good flowability and processability enabling therefore thin wall designs;Xytron™ PPS allows for super high temperatrue resistance for long term.

Brushholders (electro motors)

Automotive | e-Drivetrain | HV E-motors

Stanyl® PA46 allows for reliable solutions due to a high temperature resistance (UL1446 class H certified) and creep resistance at elevated temperatures, high toughness levels and good electrical insulation properties; Stanyl® PA46 allows for cost effective solutions due to a good flowability and processability enabling therefore thin wall designs;Xytron™ PPS allows for super high temperatrue resistance for long term.

Coil insulation

Automotive | e-Drivetrain | HV E-motors

Stanyl® PA46 allows for reliable solutions due to a high temperature resistance (UL1446 class H certified) and creep resistance at elevated temperatures, high toughness levels and good electrical insulation properties; Stanyl® PA46 allows for cost effective solutions due to a good flowability and processability enabling therefore thin wall designs;Xytron™ PPS allows for super high temperatrue resistance for long term.

Contact us for more information

Direct and easy access to our broad portfolio of high-performance plastics: request a quote or order a sample. You can also simply ask us a (technical) question. 

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