Vegetable oil-based hyperbranched

Key words vegetable oil-based hyperbranched polymers, preparation of hyperbranched polymers, structure-property relationships of hyperbranched polymer, applications of hyperbranched polymers. 

Vegetable oil-based hyperbranched polymers are prepared mainly by double monomer methodology (DMM), although single monomer methodology (SMM) may also be used. 

In this approach, AB2 type or other similar monomers such as AB (x = 4, 6, 8, etc.) monomers are polymerised by a polycondensation reaction. Gelation, a general problem in the polymerisation of multifunctional monomers, is avoided by the use of a dilute solution and the slow addition of monomer(s). Vegetable oil-based hyperbranched polyhydrocarbons, polyethers, polyesters, polyamides, and so on may be prepared by this method. 

The double monomer methodology (DMM) is also used to obtain vegetable oil-based hyperbranched polymers. In this approach, direct polymerisation of two types of monomers or monomer pairs generates hyperbranched polymers. DMM can be divided into two main subclasses based on the selected monomer pairs and reaction pathways. In this technique, an A2 with a Bj monomer causes polymerisation, known as an A2 + B3 approach, or a monomer pair generates an in situ AB intermediate to form hyperbranched polymer. The last approach is known as couple monomer methodology (CMM). 

Table 9.1 Mechanical properties of different vegetable oil-based hyperbranched polyurethanes with a long chain segment...

Vegetable oil-based hyperbranched polymers possess unique structural features which give them a wide number of potential applications in different fields. These include nanoscopic size, spheroidal surface, high... 

Vegetable oil-based hyperbranched polymers have considerable potential in biomedical applications. This is due to their unique structural characteristics along with their biodegradability and biocompatibiUty. Preliminary studies show that vegetable oil-based hyperbranched polyurethanes have the potential to be used as biomaterials in biomedical applications such as drug delivery systems, biomedical smart materials and catheters. ... 

What are the basic differences between vegetable oil-based hyperbranched and analogous conventional polymers ... 

What are the different synthetic approaches used to obtain vegetable oil-based hyperbranched polymers ... 

How is the structure of a newly developed vegetable oil-based hyperbranched polymer characterised ... 

Explain the potential of vegetable oil-based hyperbranched polymer to gain commercial acceptance. 

Do you agree with the comment that vegetable oil-based hyperbranched polymers are materials for the future Justify your answer. 

H. Deka and N. Karak, Vegetable oil based hyperbranched thermosetting poly-urethane/clay nanocomposites . Nanoscale Res Lett, 2009, 4,758-65. 

H. Deka and N. Karak, Rheological study of vegetable oil based hyperbranched polyurethane/multi-walled carbon nanotube nanocomposites , Polym-Plastics Technol Eng, 2011,50,797-803. 

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