Difference Between Sulfur and Peroxide Cure

Thekey differencebetween sulfur and peroxide cure is thatsulfur curedEPDMshows low chemical and thermal resistance compared to the peroxide cured EPDM。

The term EPDM stands forEthylene Propylene Diene Monomers。这是一种高密度synthetic rubber。Generally, this material is not heat resistant compared to materials such assilicone, but it can withstand high temperatures that are up to about 130 Celsius degrees. Therefore, we can do sulfur curing and peroxide curing to enhance this property of chemical and thermal resistance.

CONTENTS

1.Overview and Key Difference
2.What is Sulfur Cure
3.什么是过氧化物治疗
4.Side by Side Comparison – Sulfur vs Peroxide Cure in Tabular Form
5.概括

What is Sulfur Cure?

Sulfur is a chemical element having the chemical symbol S and atomic number 32. It is a polyatomic nonmetal having the electron configuration [Ne]3s²3p⁴。This is an abundant, multivalent, and nonmetallic chemical substance that occurs in two major forms as organic sulfur and inorganic sulfur. We can use this nonmetal for the production of sulfur cured EPDM.

EPDM或乙烯丙烯二烯单体是一种流行的多功能橡胶化合物，可商购。EPDM最令人关注的特性是出色的热量，臭氧和耐候性。我们可以将这种材料固化为硫或过氧化物。在这里，我们需要根据最终用途及其应用选择适当的材料和方法。

Generally, sulfur cured EPDM is common and readily available compared to peroxide cured EPDM. Moreover, this material is generally more commercially attractive. However, it can withstand temperatures up to about 250 degrees Fahrenheit, which is comparatively a low value. Furthermore, sulfur cured EPDM is higher in tensile strength, has a high tear strength, and permits us to use it in a wide range of fillers.

什么是过氧化物治疗?

过氧化物是一种反应性化学物种，其中两个氧原子与单个共价键相连。有几种过氧化物是漂白剂。我们可以使用过氧化物获得过氧化物固化的EPDM。

In general, EPDM that is cured with peroxide has a superior chemical and thermal resistance compared to sulfur cured EPDM. The peroxide cured EPDM is able to withstand temperatures up to 300 degrees Fahrenheit. Moreover, it can improve the compression set and ageing resistance of the material.

Furthermore, peroxide cured EPDM has high-temperature resistance, good resistance to ageing, low compression set, improved resistance to chemicals and oils, and it will not stain metals or PVC.

硫和过氧化之间的区别是什么Cure?

We can do sulfur curing and peroxide curing to enhance the properties of EPDM by increasing chemical and thermal resistance. The key difference between sulfur and peroxide cure is that sulfur cured EPDM shows low chemical and thermal resistance compared to peroxide cured EPDM. Moreover, sulfur cured EPDM has high tensile strength, high tear strength, and permits us to use it in a wide range of fillers while peroxide cured EPDM has high-temperature resistance, good resistance to ageing, low compression set, improved resistance to chemicals and oils, and it is will not stain metals of PVC.

Below is a summary of the difference between sulfur and peroxide cure in tabular form.

概括– Sulfur vs Peroxide Cure

The term EPDM stands for Ethylene Propylene Diene Monomers. It has a low thermal resistance, so we need to cure it to enhance its properties. We use sulfur curing and peroxide curing to enhance this property of chemical and thermal resistance. The key difference between sulfur and peroxide cure is that sulfur cured EPDM shows low chemical and thermal resistance compared to the peroxide cured EPDM.

Reference:

1. “Peroxide or Sulphur Cured EPDM – What Does Your Application Need?” Rocket Seals, Inc.,Available here。

Image Courtesy:

1. “EPDM copolymer” By Doxepine – Own work (Public Domain) viaCommons Wikimedia