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Polyesters polymers from functionalized

Polymers from Functionalized Triglycerides Polyesters. One of the oldest polyesters prepared from triglyceride oils are the alkyd resins. They are widely used in... [Pg.442]

Fierier I, Le Borgne A, Spassky N (1990) Synthesis of functional polyesters derived from serine. Polym Bull 24 349-353... [Pg.215]

The processes described in Table 2 present a peculiar interest in the working out of new materials as polyurethanes. These last polymers are very often based on macro diols coming from polyethers or polyesters, a-co functional polyolefins being relatively uncommon. Hence, Rhein and Ingham [139] prepared macrodiols by ozonization of polyisobutylene in CC14 at... [Pg.62]

The melt condensation of acid and hydroxyl functional group normally requires exact stoichiometry, elevated temperature, and a long reaction cycle. Such a route would not be possible to utilize to produce block polymers from lactones and other vinyl monomers. However, a rather facile route leading to polyester formation can be realized by the ring-opening polymerization of lactones as seen from the scheme ... [Pg.161]

The synthesis and the study of intrinsic properties of well-defined cyclic synthetic polymers are still a challenge in polymer science. Approaches for their preparation were first concentrated on polymers exhibiting linear ring-chain equilibria. This corresponds to polymers containing functional groups in their backbone chain such as poly(dimethylsilox-anes) (PDMSs), polyethers, polyesters, and so forth. The synthesis of cyclic polymers from carbon-carbon chains free... [Pg.5]

Although less frequently than with polyesters, it is possible to produce other polymers from ADMET polymerisation. Mecking and co-workers [44] described the synthesis of polyacetals and polycarbonates (PC) with a sparse and systematically varied density of functional groups generated by ADMET copolymerisation of unfunctionalised undeca-1,10-diene with bis(undec-10-en-l-yloxy)methane or di(undec-lO-en-l-yl) carbonate, followed by exhaustive hydrogenation (Scheme 5.10). [Pg.94]

Different polymeric materials such as alkyd resins, polyesters, and polyurethanes can be prepared from triglycerides and biodiesel after functionalization. As the synthesis of monomers and polymers from vegetable oils has several industrial applications, research in this area is widely... [Pg.441]

As described earlier, the use of organosilanes grew from work sponsored by the US Air Force to find products that performed better than the original chrome complexes in glass fiber reinforced unsaturated polyester resin composites. The first success was achieved with vinyl trichlorosilane and its mixtures with allyl alcohol. The unsaturation provided the polymer reactive functionality while the chloro-groups provided the fiber reactive ones. The fiber reactivity comes about by hydrolysis of the chloro-groups to form silicon hydroxyls, which are then able to condense with surface hydroxyls, as shown in the following simplified reaction sequence. [Pg.513]

This chapter focuses on the preparation of thermosets, polyesters, and other polymers from industrial oilseeds. Nature has provided a few examples of plant oils that possess multiple functional groups needed for polymer synthesis, such as castor (Ricinus communis), lesquerella (Lesquerella fendleri), and vemonia (Vernonia galamensis) oils, enriched in —OH and epoxide-functionalized fatty acids ricinoleic, lesquerolic, and vemolic acid, respectively (Table 3.1). Many common plant seed oils (eg, soybean, cottonseed, com, soybean, safQower, sunflower, canola, jatropha, and olive oils) are enriched in Ci6—Cig saturated and mono- and diunsaturated fatty acids, such as palmitic (16 0), oleic (18 l-9c), and linoleic (18 2-9c,12c) acids and lesser amounts of a-linolenic acid (18 3-9c,12c,15c) however, linseed (flaxseed), camelina (Camelina saliva). [Pg.43]

Carbohydrates have high functionality and are also starting materials for (di)hydroxy d. Oleochemical sources have the disadvantage of contributing only monofunctionality. It is therefore highly desirable to find routes of incorporating difunctionality to make them useful, e.g., as building blocks in polymers such as polyamides, polyesters and polyurethanes (- polymers from fats and oils). [Pg.75]

Kalambur, S. Rizvi, S.S.H. (2005). Biodegradable and functionally superior starch-polyester nanocomposites from reactive extrusion. Journal of Applied Polymer Science, 96, 1072-1082. [Pg.770]


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