#materialscience

Research, development and commercial applications of advanced flexible materials.

Recent Articles

Polymer Basics for Polyolefins


Abstract

Polyolefins are polymers composed of simple alkenes, with the most notable being ethylene and propylene. With both polyethylene and polypropylene different grades are available. Polyethylene has varying densities whereas polypropylene has varying locations of the methyl group. Polyethylene is used in applications such as packaging, filters, underpads for hospital beds, and heart valves. Polypropylene is used in applications such as syringes, drapes and gowns, packaging, and sutures.
 
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Polymer Basics for Polyesters


Abstract

Polyesters are typically crystalline thermoplastics with excellent chemical resistance, relatively low water absorption, and excellent tensile and electrical properties. They are applicable in dental instruments, IV components, medical textiles, and films and packaging. Copolyesters are produced when more than one diacid is used in the polymerization process. These polymers are amorphous, have good impact strength, and are easily processable. Copolyesters are applicable in the use of IV systems, vials, and medical trays.
 
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Polymer Basics for Polycarbonates


Abstract

Polycarbonates are composed of a Bisphenol A part and a carbonate group. They are typically known for their characteristics of toughness, transparency, and having a fairly high heat resistance. Different blends of polycarbonates can enhance desired properties, such as an increase in ductility and impact strength at varying temperatures. They are used in applications such as surgical instruments, connectors, and needle-free injection systems.
 
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Polymer Basics for Polyamides


Abstract

Polyamides are polymers in which the repeating units are held together by amide links. They are more commonly referred to as nylons, and the specific nomenclature for the type of nylon derives from the amount of carbon atoms contained within the molecule. They combine flexibility, hardness, toughness, and resistance to warping all into one material. Polyamides are used in surgical instruments, sutures, and catheters.
 
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Polymer Basics for High Temperature Thermoplastics


Abstract

High temperature thermoplastics are characterized by their high heat resistance (>200 °C), strength, long-term durability, and biocompatibility. In their molecular structure, it is the use of rigid aromatic rings that yields their temperature resistance. These are used in many medical applications including dialysis membranes, surgical forceps, and implantable devices.
 
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