Physicochemical properties of some important polyanhydrides are listed in a table for easy reference. Another important class of biodegradable polymers is poly ortho esters POEs.
Although many different generations of POEs have been developed, they could not be commercialized due to very fast hydrolysis, difficult and non-reproducible synthesis of the starting monomers and polymers, unsatisfactory mechanical properties, etc. They are the highlight of chapter 4 written by Jorge Heller describing chemistry with reaction procedures for the synthesis with more emphasis on the last promising generation made by reaction of diketene acetal with a mixture of diols and latent acid diols.
Various examples of these three classes of polymers are highlighted with their synthetic methods and properties. Although for easy understanding of the chemistry lots of reaction schemes are given, redrawing is necessary in the new edition of the book with uniform font size and bond lengths. A table compiling important polymers with structure, properties and literature references would make this chapter more attractive. Biodegradable polyurethanes, an important class of biomaterials, are being researched increasingly and tried for different biomedical applications.
The first part of chapter 6 deals with the synthesis and properties of biodegradable petro- and biobased polyurethanes. Biodegradation mechanism and biomedical applications of biodegradable polyurethanes are also discussed with relevant literature references.
A compilation of physicochemical properties of the most studied and used biodegradable polyurethanes would have made this part of the chapter complete. Poly ester amide s are introduced in short in the second part of the chapter without providing too many details about degradation behavior, application areas and physical properties, though, a good collection of literature is given for further reference.
Chapter 7 is a very crisp compilation of many different polysaccharides discussing origin, structure and properties in sufficient detail for both beginners and experts in this field with literature references.
Shape memory polymers remember their shape and come back to their predefined shape with external stimuli like temperature or light. Combination of biodegradability and the shape memory property is highly desirable for many biomedical applications like minimal invasive surgery, sutures, etc. The basics of shape memory polymers, classification and applications are described in short in chapter 8 in an easy to understand way.
Biodegradable elastic hydrogels chapter 9 are interesting biomaterials for use in tissue engineering and other biomedical applications. A short description of elastic hydrogels with many examples and properties are described.
Dendrimers are monodisperse, three-dimensional globular structures with symmetrical branches emerging from a core.
Inter-cavity, low polydispersity and large number of end-functional groups make them interesting substitutes of linear biodegradable polymers for applications like drug release, gene transfection, catalysis, coatings, etc. Chapter 10 is an informative review regarding this important macromolecular architecture with emphasis on examples of degradable dendrimers, synthesis and biocompatibility.
Biodegradation is a complex process affected by the type of the materials, microorganisms and the environment in which the material is being degraded.
Terms like enzymatic degradation, hydrolytic degradation, erosion, compostability, etc. Send an e-mail. Biodegradable polymers are niche but ever-expanding market materials finding focused applications in sectors where biodegradability, together with the performances they attain during use, offers systematic environmental benefits: agricultural applications, packaging, catering, hygiene and slow release items.
They represent a highly promising solution, since they have the potential to overcome environmental concerns such as the decreasing availability of landfill space and the depletion of petrochemical resources, and also offer a sustainable alternative option to mechanical and chemical recycling.
This handbook covers the mechanisms of degradation in various environments, by both biological and nonbiological means, and the methods for measuring biodegradation.
This updated edition of the handbook goes on to consider the characteristics, processability and application areas of biodegradable polymers, with key polymer family groups discussed polyhydroxyalkanoates, starch, lactic acid-based polymers, aliphatic-aromatic polyesters and protein-based materials , to explore the role of biodegradable polymers in different waste management practices including anaerobic digestion, and to consider topics such as the different types of biorefineries for renewable monomers used in producing the building blocks for biodegradable polymers.
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