Differences between thermoplastics and thermosetting plastics
Answers
Thermoplastics pellets soften when heated and become more fluid as more heat is administered. The curing process is 100% reversible as no chemical bonding takes place. This characteristic allows thermoplastics to be remolded and recycled without negatively affecting the material’s physical properties. There are a variety of thermoplastic resins that offer various performance benefits, but the majority of materials commonly offer high strength, shrink-resistance and easy flexibility. Depending on the resin, thermoplastics can serve low-stress applications such as plastic bags or high-stress mechanical parts. Examples of thermoplastic polymers include polyethylene, PVC, and nylon.
Thermoplastic Advantages:
Highly recyclable
High-Impact resistance
Reshaping capabilities
Chemical resistant
Aesthetically superior finishes
Hard crystalline or rubbery surface options
Thermoplastic Disadvantages:
Expensive
Can melt if heated
Thermoset plastics, typically processed by reaction injection molding, contain polymers that combine together during the curing process to form a permanent chemical bond. This process forms weak bonds between the monomer chains within these materials and eliminates the risk of the product remelting when heat is applied, making thermosets ideal for high-heat applications like appliances and electronics. Thermoset plastics greatly improve the material’s mechanical properties, providing enhanced chemical resistance, heat resistance and structural integrity. Thermoset plastics are frequently used for sealed products due to their resistance to deformation and are also among some of the most impact resistant plastics available. Examples of thermoset plastic polymers include epoxies, phenolics, silicones, and polyesters.
Thermosetting Plastic Advantages:
More resistant to high temperatures
Highly flexible design
Thick to thin wall capabilities
High levels of dimensional stability
Cost-effective
Thermosetting Plastics Disadvantages:
Can’t be recycled
More difficult to surface finish
Can’t be remolded or reshaped
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