By Michael Niaounakis
Biopolymers and biodegradable plastics are discovering new functions in a number of sectors, from packaging, to scientific, car and lots of extra. As man made plastics are more and more changed by way of their bioplastic equivalents, engineers are dealing with new demanding situations together with processing, charges, environmental sustainability and - eventually - constructing profitable products.
Biopolymers: Processing and Products, the second one publication of a trilogy devoted to biopolymers, supplies an in depth perception into all facets of processing, seamlessly linking the technology of biopolymers to the most recent traits within the improvement of latest items. procedures coated within the publication contain mixing, compounding, therapy, and shaping, in addition to the formation of biocomposites. Biopolymer coatings and adhesives also are investigated.
This ebook designated in its assurance comprises info retrieved in most cases from patents, which shape the majority of the booklet. The assurance of processing may help engineers and architects to enhance output and potency of each level of the product improvement technique, and should shape an quintessential instrument in choosing the right biopolymer and processing process for any given software, protecting clinical, car, nutrition packaging and extra. it is going to help additionally engineers, fabric scientists and researchers to enhance latest biopolymer strategies and convey greater items at decrease cost.
- Multi-disciplinary method and significant presentation of all on hand processing innovations and new items of biopolymers
- Contains info to not be present in the other book
- Self-contained chapters
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Extra info for Biopolymers
However, its commercialization for thermoplastic applications has been complicated by poor thermal and processing properties. PPC has a relatively low Tg (37–41 °C); furthermore, its terminal groups are hydroxyl groups, therefore PPC has shortcomings such as viscous flow at room temperature and a relatively large brittleness at low temperature. An end-capped PPC can prevent the occurrence of unzipping reaction from its terminal, so that its heat stability is improved (2007, US2007117908 A1, CHANGCHUN APPLIED CHEMISTRY).
Suitable diacids include adipic acid, succinic acid, azelaic acid, and glutaric acid, etc. Suitable polyols include ethylene glycol, glycerol, 1,4-butane diol, 1,2-propanediol, 1,6-hexane diol, 1,10-dodecane diol, etc. Most of bio-based polyols for biobased PUs are synthesized from vegetable oils. Vegetable oils include castor, soy, sunflower, rapeseed, and linseed oils. Chain extenders that break down to compounds such as amino acids have been used for formulating biodegradable PUs. 14. The isocyanate component is not produced from renewable resources.
PUs have a broad spectrum of types and properties (soft and flexible foams, coatings, elastomers, and fibers) and are used in a very wide range of applications. The market for bio-based PUs is small and premium applications are being targeted. As an example, Metzeler Schaum currently produces bio-based PU flexible foam from a sunflower oil and/ or rapeseed oil polyol, the Rubex® Nawaro flexible foam for the furniture and auto industry . Biodegradable PUs are used as “shock absorber” materials in shoes soles and heels and as a carpet backing using PU derived from soy.