What is the difference between polycarbonate and Acrylic?
Polycarbonate and acrylic are both types of plastic materials with similar characteristics, but they have some distinct differences. Here are the key differences between polycarbonate and acrylic:
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Strength and Impact Resistance: Polycarbonate is significantly stronger and more impact-resistant than acrylic. It is known for its exceptional toughness and can withstand high levels of impact without shattering. Acrylic, on the other hand, is more brittle and prone to cracking upon impact.
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Transparency: Acrylic has better optical clarity and transparency compared to polycarbonate. Acrylic sheets have a higher light transmittance, allowing more light to pass through with minimal distortion. Polycarbonate sheets may have a slight yellowish tint and can have a lower level of clarity, especially in thicker sheets.
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Chemical Resistance: Polycarbonate exhibits superior resistance to chemicals, including oils, fuels, and many acids. Acrylic is also resistant to a wide range of chemicals but may be more susceptible to certain solvents, especially if exposed for an extended period.
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Temperature Resistance: Polycarbonate has a higher heat resistance than acrylic. It can withstand higher temperatures without significant deformation or melting. Acrylic has a lower melting point and may start to deform or soften at lower temperatures.
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UV Resistance: Polycarbonate inherently contains UV stabilizers, making it highly resistant to UV radiation. It provides better protection against yellowing, discoloration, and degradation when exposed to sunlight. Acrylic, without proper UV protection additives, is more prone to UV-induced yellowing and degradation over time.
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Ease of Fabrication: Acrylic is generally easier to fabricate, cut, and shape compared to polycarbonate. It can be easily machined, laser cut, and bonded. Polycarbonate requires specialized tools and techniques due to its higher toughness and impact resistance.
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Cost: Acrylic tends to be more cost-effective compared to polycarbonate. Polycarbonate's superior impact resistance and other properties make it a higher-priced material.
Considering these differences, the choice between polycarbonate and acrylic depends on the specific application requirements. Polycarbonate is preferred for applications where high impact resistance and strength are crucial, such as safety barriers, bulletproof panels, and outdoor glazing. Acrylic is often chosen for applications where optical clarity, ease of fabrication, and cost-effectiveness are the main considerations, such as signage, displays, and indoor glazing.