Polymers non-biodegradable

Polymer nanoparticles including nanospheres and nanocapsules (Fig. 1) can be prepared according to numerous methods that have been developed over the last 30 years. The development of these methods occurred in several steps. Historically, the first nanoparticles proposed as carriers for therapeutic applications were made of gelatin and cross-linked albumin. Then, to avoid the use of proteins that may stimulate the immune system and to limit the toxicity of the cross-linking agents, nanoparticles made from synthetic polymers were developed. At first, the nanoparticles were made by emulsion polymerization of acrylamide and by dispersion polymerization of methylmethacry-late.f These nanoparticles were proposed as adjuvants for vaccines. However, since they were made of non-biodegradable polymers, these nanoparticles were rapidly substituted by particles made of biodegradable... 

Since EVAc is a non-biodegradable polymer, the implanted device has to be surgically removed from the host after completion of the immunization process. Hence, it would be advantageous to use biodegradable devices for the controlled release of antigen. 

Non-biodegradable Polymer Materials Biodegradable Polymer Material... 

At present these materials are too expensive to be considered as viable alternatives to the commodity plastics in packaging but they do have potential applications in biomedical products such as orthopaedic implants and even as temporary replacements for parts of the pericardium during open-heart surgery. In this kind of application, performance is much more important than cost. However, Biopol may be able to replace non-biodegradable polymers in paper coating which would then allow paper composite materials to biodegrade much more rapidly in compost and similar environments. 

PEG, dextran, silica, gelatin, etc., and non-biodegradable polymers, such as PMMA, polyacrylamide, polystyrene, poly cyanoacrylate, polyphosphazene derivatives, etc., are being explored in the field of drug and gene delivery (Park et al., 2009). 

It is environmentally important to perform a life cycle assessment analysis, not only for non-biodegradable polymers but also for partially biodegradable or even completely biodegradable polymers. Life cycle analysis (LCA) is a tool which helps in understanding the environmental impact associated with the products, processes and activities throughout the life of a polymer. The life cycle of vegetable oil-based polymers is shown in Rg. 2.6. Thus a complete LCA would include three separate but interrelated components, an inventory analysis, an impact analysis and an improvement analysis. 

Is it possible to transfer a synthetic non-biodegradable polymer to a partially biodegradable polymer If so, how may this be done ... 

A biodegradable plastic blend consists of both a biodegradable material and a non biodegradable polymer, such as a poly(prop-ylene) (PP), poly(urethane) (PU), PE, PP, or poly(carbonate) These materials are treated (14) ... 

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