Polycarbonate Melting Point – A Detailed Insight on PC Working Temperature

Understanding melting point of polycarbonate (PC) is critical in modern plastic fabrication and applications.

For instance, whether you want to injection PC, thermoform PC or use it for specific application, a knowledge on working temperature is critical.

In this guide, we will explore all fundamental aspects about melting temperature of polycarbonate. Besides, you will also explores factors affecting melting point, and properties among others.

Let’s dive right in:

Does Polycarbonate Melt?

Yes, polycarbonate melts, but at really high temperatures compared to several other typical plastics. Unlike several plastics that will soften below a hot pan, it takes a lot more heat to make it melt.

Diiferent Molecular Structure of Polycarbonate
Different Molecular Structure of Polycarbonate

Exact Melting Point of Polycarbonate

· Melting Point of Polycarbonate in Degree Celsius

When working with polycarbonate, its melting point lies between 280°C and 320°C. High melting temperatures allow it to remain in conditions demanding toughness as well as its resistance to thermal load.

You use Differential Scanning Calorimetry (DSC) techniques to measure this accurately. Once you know its melting point, you will be able to process it correctly and maintain the most desirable properties applicable.

· Polycarbonate Melting Point in Fahrenheit

Polycarbonate has a melting point between 540°F and 600°F. This wide range in the melting point is controllable to achieve a perfect set of processes in manufacturing.

Knowing the correct melting point serves better in end products that include automotive parts, electronics, and construction materials.

· Polycarbonate Glass Transition Temperature

On the other hand, when working with polycarbonate, you must also consider its glass transition temperature; this value is about 147 °C (297 °F). When it reaches that temperature, polycarbonate changes from a hard, glassy material into a more rubbery state.

This transition is essential in that it implies a lot about how the material behaves under heat before reaching its melting point.

It allows one to predict the performance of polycarbonate material in maintaining dimensional stability or flexibility. Examples include polycarbonate eyewear lenses or polycarbonate box.

Changes in Polycarbonate Structure at Melting Point

When working with polycarbonate, the temperature that it melts at will be between 280 °C and 320 °C.

At this temperature, the polymer chains have enough energy to glide by one another, thus changing from solid to viscous liquid. The tolerances of the rigid structure at this range are released, permitting the flow of polymer chains. This phase change is quite crucial in manufacturing processes, including injection molding or extrusion.

Polycarbonate Molecular Structure
Polycarbonate Molecular Structure

This will make shaping and forming amenable to making the material available for different applications. Overheating reduces the strength and clarity of the polymer. This temperature is kept within this range of operation to ensure that the polycarbonate retains its properties without any degradation.

Factors Affecting Polycarbonate Melting Point

· Molecular Weight

You may observe how severely the melting point gets affected by their difference in molecular weight as you work on polycarbonates. The higher the molecular weight of polycarbonates, the longer the structure of the polymer chain is.

Therefore, it requires incredible energy in the form of heat to flow and draw apart, which results in escalating the melting point.

· Additives and Fillers

You change the melting point of polycarbonate by adding different substances. Plasticizers make the material more processable by giving more mobility to the chains, thereby lowering the melting point.

In turn, reinforcing fillers, such as glass fibers, will result in a higher melting point, providing more structural support and thermal resistance to the material. Such customized measures improve the optimization of polycarbonate in various industrial applications.

· Processing Conditions

You are going to realize that each method of processing polycarbonate affects the melting point of the polymer. Some methods, such as extrusion, injection molding, and thermoforming, operate at specific temperature parameters that influence polymer thermal performance.

Rapid cooling during processing can yield residual stresses and minor alterations in the effective melting points.

Moreover, the heating rate directly affects the crystallinity and, thus, the thermal properties of the polycarbonate. Consequently, rigorous control of the processing conditions will result in the retention of such properties as strength and clarity.

Ideal Temperature for Thermoforming Polycarbonate

Polycarbonate material requires preheating before thermoforming to allow the plastic to distribute heat evenly and not crack during the process.

As for polycarbonate sheet, preheating would generally be in the region of 150°C to 160°C, i.e., around 302°F to 320°F. This range and rate impart material softness.

That is, you will make polycarbonate pliable without crossing its glass transition temperature so that it wouldn’t become too fluid.

The best temperature for thermoforming polycarbonate ranges between 170°C and 220°C. At a temperature of between 170 and 220 degrees Celsius, polycarbonate is soft and pliable enough for molding into highly designed shapes.

Plastic Thermoforming
Plastic Thermoforming

When the polycarbonate is formed, cooling the heated workpiece needs to be achieved gradually to around 130°C to 140°C (266°F to 284°F), and the material solidifies. If the cooling process is done correctly and at a reduced pace, warping and internal stresses can be avoided. Cooling can be done effectively by using cooling fixtures or fans.

Importance of Knowing Polycarbonate Melting Point

1. Processing Control

The knowledge of the melting point allows precise control over the concrete manufacturing processes, for example, molding and extrusion, without causing overheating. It may make sure that degradation does not occur from overheating, with possible integrity remaining for the material’s performance.

2. Quality Assurance

Knowing the point of melting ensures that the product is always of the same quality. It will be processed within the required temperature range so that defects can be avoided and reliability can be guaranteed.

3. Application Suitability

Knowing the melting point will enable you to select polycarbonate for high-temperature, thermally resistant applications. It ensures that the material performs effectively in demanding environments, such as automotive and electronics.

4. Recycling Efficiency

Being able to know the point of melting allows for process optimization during recycling. This information helps in the control of thermic ecologies necessary for the reprocessing of polycarbonate without losing its properties and, consequently, in sustainable development.


1. How much Heat can Polycarbonate Withstand?

Polycarbonate can withstand temperatures up to 115°C (239°F) without losing its properties.

2. At What Temperature does Polycarbonate Soften?

Polycarbonate softens at around 150°C to 160°C (302°F to 320°F).

3. At What Temperature will Polycarbonate Become Flexible?

Polycarbonate becomes flexible at its glass transition temperature, around 147°C (297°F).

4. Does Polycarbonate Shrink when Heated?

Polycarbonate does not shrink significantly when heated; it typically expands slightly. As you heat polycarbonate, it actually expands in all directions due to thermal expansion, just like most materials.

5. What Happens when Polycarbonate is Heated?

When heated, polycarbonate softens, becomes more flexible, and can be molded, but excessive heat can cause degradation.

Wrap Up:

Knowing polycarbonate resin melting point is critical in determining nature of application and plastic fabrication requirements. With this knowledge, you can make polycarbonate products such as face shields, goggles, windshields, and many more.

For all your polycarbonate fabricated parts, WEPROFAB is your true partner in China – contact us snow.

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