Difference Between EPDM and PVC

Key Difference – EPDM vs PVC

EPDM (Ethylene Propylene Diene Monomer) and PVC (Poly-Vinyl Chloride) are widely used聚合物owing to their unique set of properties. Thekey difference在EPDM和PVC之间是EPDM is asynthetic rubber,which is synthesized from petroleum byproducts whereas, PVC is athermoplastic,which can be melted down at high temperatures and thus, acquiring mouldable properties and can be cooled again to gain back the solid form. The difference between EPDM and PVC is discussed below in more detail.

内容

1.Overview and Key Difference
2.什么是EPDM
3.What is PVC
4.Side by Side Comparison – EPDM vs PVC in Tabular Form
5.概括

什么是EPDM?

EPDM（乙烯丙烯二烯单体）是一种源自乙烯和丙烯的广泛使用的合成橡胶。这是通过将非偶联的二烯嫁接到主链中产生的Terpolymer。使用EPDM的硫化sulfuris possible due to the presence of crosslinks in interchains. EPDM is manufactured in various viscosities and different ethylene/propylene ratios. When the ethylene content is high, the rubber will give more green strength and poor low-temperature properties. The type and amount of diene单体嫁接在橡胶上的单位决定了硫化的易感性。EPDM众所周知是天气和臭氧橡胶。根据生胶弹性体制造商，上部连续热老化温度约为126°C至150°C。

The low-temperature flexibility of EPDM is well above when compared with natural rubber and SBR (styrene butadiene rubber), but with very poor oil resistance. Because of the properties mentioned above, EPDM is widely used as roof membrane linings and extruded channels for windows. Also, it is used in a blend with natural rubber in tire sidewalls to reduce the cracking by ozone attack. Moreover, excellent electrical insulation property of EPDM enables it to use in medium and high voltage cable covers. The combination of properties including good resistance to water absorption and good mechanical properties and low cost make it uses as pond liners. EPDM is also used in automotive industry as radiator and heater hoses and weather strips.

What is PVC?

PVC(Poly-Vinyl Chloride) is made by the polymerization of vinyl chloride. The monomer vinyl chloride is produced by chlorine obtained from salt waterelectrolysis, and ethylene obtained from naphtha. Various additives must be added to PVC during the processing to meet the desired properties, as PVC possesses low thermal stability and high melt viscosity. The appropriate formulations of PVC can cover a broad range of applications as a thermoplastic. It is the second largest commodity thermoplastics after polyethene (PE) in the world owing to its excellent set of properties, low cost and medium to long-term lifespan applications. The玻璃过渡温度(T_gPVC的）位于约80°C。PVC主要是amorphous（90％），因此没有确切的熔点。可以通过添加增塑剂使PVC灵活。因此，该材料被称为PVC-C。没有增塑剂的PVC的干燥混合物被称为PVC-Uand are used for rigid applications such as pipes, gutters etc.

PVC耐用，可以配制以增加天气电阻。它也可以用于食物接触，医疗应用是由于其惰性和清晰度。刚性PVC是不可易能的，并且具有很高的影响力。此外，它对许多化学物质，油脂和油具有抗性。与其他热塑性塑料相比，PVC的比重更高，并且连续的服务温度相对较低。由于单体（乙烯基氯化物），二恶英和邻苯二甲酸酯增塑剂以及铅（镉）的健康危害行为，因此一些消费者倾向于限制PVC的使用。PVC的应用包括门，窗框，管道，排水沟，屋顶膜，电信电缆，墙壁塞，透析管，手术手套，食品包装等。

EPDM和PVC有什么区别？

EPDM vs PVC
EPDM是一种源自乙烯和丙烯的合成橡胶。	PVCis a thermoplastic elastomer produced by the polymerization of vinyl chloride.
主要特性
Excellent weather and ozone resistance, good low-temperature flexibility, crack resistance, good resistance to water absorption and good mechanical properties.	Medium to long-term lifespan, weather resistance, biocompatibility, high impact resistance, resistant to many chemicals, oils and grease, and good clarity
Limitations
非常差的油性和硬度，低温性能	Low thermal stability, low continuous service temperature and health hazards associated with monomer and additives.
典型的玻璃过渡温度
-55°C	80 °C
申请
Roof membrane linings, extruded channels for windows, tire sidewalls, high voltage cable covers, pond liners, radiator and heater hoses, weather strips etc.	Doors, window frames, pipes, gutters, roofing membranes, telecommunication cables, wall plugs, dialysis tubing, surgical gloves, food packages etc.

概括– EPDM vs PVC

EPDM和PVC由于其制造成本和出色的特性而广泛使用聚合物。EPDM是由乙烯和丙烯制成的合成橡胶，具有出色的臭氧和耐候性能。PVC是一种广泛使用的热塑性弹性体，具有化学和油的耐药性，并且具有良好的抗冲击性能。这两种聚合物均用于耐候性应用中。但是，可以根据最终应用程序/产品更改其属性。这是EPDM和PVC之间的差异。

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You can download PDF version of this article and use it for offline purposes as per citation note. Please download PDF version hereDifference Between EPDM and PVC

Reference:

1.Ciesielski, A. (1999). An introduction to rubber technology. iSmithers Rapra Publishing.
2.Carraher Jr，C。E.（2012）。聚合物化学简介。CRC出版社。
3. Patrick，S。（2005）。聚氯乙烯的实用指南。Ismithers Rapra Publishing。

Image Courtesy:

1.’Robinetterie-PVC’By Nerijp – Own work,(CC BY-SA 3.0)viaCommons Wikimedia
2.’EPDM Rubber flat roof Halifax’By Crownbuild – Own work,(CC BY-SA 3.0)viaCommons Wikimedia