polymers

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By Kieran Niner Polymers

How are alkenes turned into polymers? : 

How are alkenes turned into polymers? Synthetic polymers are produced by chemical reactions, termed "polymerisations." Polymerisations occur in varied forms--far too many to examine here--but such reactions consist of the repetitive chemical bonding of individual molecules, or monomers. Assorted combinations of heat, pressure and catalysis alter the chemical bonds that hold monomers together, causing them to bond with one another. Most often, they do so in a linear fashion, creating chains of monomers called polymers.

What is Kevlar? : 

What is Kevlar? Kevlar is the registered trademark for a para-aramid synthetic fibre, related to other aramids such as Nomex and Technora. Developed at DuPont in 1965, this high strength material was first commercially used in the early 1970s as a replacement for steel in racing tires. Kevlar is an exceptionally strong, light, man-made polymer used to strengthen cables and sheet materials, e.g. in stab-resistant vests.

What are smart polymers? : 

What are smart polymers? Smart polymers are plastics which change or react in a certain way according to the environment they are in. Smart polymers can be affected by light, heat pressure, pH and water to name a few. Uses of smart polymers are: hydrogels (nappies and moisture crystals used in compost so your hanging baskets don't dry out!), plasters (band aids) that lose their stickiness when you want to take them off so don't rip your skin off, biodegradable plastic bags, non-stick chewing gum and even biological uses like detecting blood glucose levels and triggering the release of insulin.

Biodegradable : 

Biodegradable Biodegradation is the chemical breakdown of materials by a physiological environment. The term is often used in relation to ecology, waste management and environmental remediation (bioremediation). Organic material can be degraded aerobically with oxygen, or anaerobically, without oxygen.

What Polymers? : 

What Polymers? Polymers used in dental fillings are thermoplastic polymers. Polymers that are used in wound dressings are carbohydrate polymers and polymers used for hydro gels in nappies are polyacrylic acid.

What are shape memory polymers? : 

What are shape memory polymers? Shape memory polymers (SMPs) are polymeric smart materials that have the ability to return from a deformed state (temporary shape) to their original (permanent) shape induced by an external stimulus (trigger), such as temperature change. An example of a shape memory polymer is space putty.

Becoming Biodegradable : 

Becoming Biodegradable Modern polymers can be changed to be biodegradable by breaking the chains of the polymers into smaller chains which would mean they would break down quicker and not leave behind as many toxic things that would damage the environment.

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