A Review of Vegetable Oil-Based Polymers: Synthesis and Applications (original) (raw)
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A review on vegetable oil based biodegradable polymers
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The reviewed work addressed the shift in focus from conventional polymers to bio-based and renewable polymers. This extensively discussed the values of various fatty acid components present in the oils and polymers. Areas of application of the thermosetting polymers obtained from plant seed oils were discussed. Non-biodegradable polymers are causing severe damage to the environment. To counter this, need of biodegradable polymers is gaining a rapid growth in numbers, in their applications and quantities used. In this manuscript, we have briefly described important vegetable oil derived materials such as alkyds, poly-esteramides, , polyurethanes, epoxies, polyols, along with their preparation and applications as protective coatings. A small portion of the review is also dedicated to the future perspectives in the field. In spite of their extensive utilization in the world of coatings, literature survey revealed that in the past no review has come up describing the chemistry and appli...
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Although the petrochemical polymers have revolutionized the technological development, the intensive use of these materials have contributed to the global pollution. In this context, researches involving ecofriendliness materials are growing up, as well as, a current interest in developing materials from inexpensive and renewable resources, such as vegetable oils. In this work, is described the synthesis of polymeric materials by thermal polymerization from linseed oil (Linum usitatissimum L.) and passion fruit oil (Passiflora edulis) and their characterization by gas chromatographic (GC), Fourier transform infrared (FTIR) spectroscopy, solubility in organic solvents, thermogravimetry (TG), differential scanning calorimetry (DSC) and Raman spectroscopy. The TG curve shows that those polymeric materials present two stages of decomposition. DSC plots of the vegetable oils showed some endothermic and exothermic transitions which are not present in the DSC curves corresponding to oil-based polymers. The Raman spectra of the polymers indicate declining of absorbance in the region of CC stretching (∼1600 cm−1). This absorption was used to estimate the degree of polymerization (79% and 67.5% for linseed and passion fruit oils, respectively).
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Polymer, 2005
A range of thermoset plastics have been prepared by the cationic copolymerization of olive, peanut, sesame, canola, corn, soybean, grapeseed, sunflower, low saturation soy, safflower, walnut, and linseed oils with divinylbenzene or a combination of styrene and divinylbenzene comonomers catalyzed by boron trifluoride diethyl etherate. The chemical, physical, thermal, and mechanical properties of these new polymers have been investigated as a function of the vegetable oil composition. The vegetable oil reactivity has a direct effect on most of the polymers' properties, which can be reasonably predicted by careful choice of the vegetable oil. Coupled with variations in the comonomer and stoichiometry, the choice of vegetable oil allows one to tailor the polymer's properties for specific applications.
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This review presents recent research advances in defining the curing and thermal characteristics, mechanical properties and appropriate processing techniques of thermoset resin derived from vegetable oils. Vegetable oil is the latest alternative found to replace the dependence on petroleum-based synthetic resin. Petroleum based resin reinforced with synthetic fiber composite is unbiodegradable, cannot be reused and recycled. Thus, it is very valuable to replace the dependance petroleum based resin to renewable source which contributes to green environment. However, biocomposites synthesized from vegetable oil-based resin matrix, reinforced with natural fiber, have some limitations. The properties are differentiated based on the type of vegetable oil. Modifying the fatty acid chain and applying nanoclay in composites as filler, helps to improve some properties due to the addition of vegetable oil in the resin system. Within this contribution, special emphasis was placed on a broad-brush approach over the potential opportunities concerning the use of renewable feedstock, such as modification of soybean oil, linseed oil, and nahar oil in thermoset resin. This review is focusing on investigating the approaches that have been proposed to produce bioresin and bio-based nanocomposites.
Modified Vegetable Oil Based Additives as a Future Polymeric Material—Review
Polymeric materials from renewable resources have attracted a lot of attention in recent years. The development and utilization of vegetable oils for polymeric materials are currently in the spotlight of the polymer and chemical industry, as they are the largest renewable platform due to their universal wide availability, ingrained biodegradability, low cost, and excellent environmental aspects (i.e., low ecotoxicity and low toxicity toward humans). These excellent natural characteristics are now being taken advantage of in research and development, with vegetable oil derived polymers/polymeric materials/composites being used in numerous applications including paints and coatings, adhesives, and nanocomposites. The aim of this review paper is to give a fundamental description of the various vegetable oil applications in polymer materials and its recent developments. Particular emphasis will be placed on study and main application of triglyceride based additive for polymer and to give the reader an insight into the main developments is discussed .
Soybean- and castor-oil-based thermosetting polymers: Mechanical properties
Journal of Applied Polymer Science, 2006
Maleic anhydride modified soybean-and castor-oil-based monomers, prepared via the malination of the alcoholysis products of the oils with various polyols, such as pentaerythritol, glycerol, and bisphenol A propoxylate, were copolymerized with styrene to give hard rigid plastics. These triglyceride-based polymers exhibited a wide range of properties depending on their chemical structure. They exhibited flexural moduli in the 0.8-2.5 GPa range, flexural strength in the 32-112 MPa range, glass transition temperatures (T g) ranging from 72 to 1528C, and surface hardness values in the 77-90 D range. The polymers prepared from castor oil exhibited significantly improved modulus, strength, and T g values when compared with soybean-oil-based polymers. These novel castor and soybean-oil-based polymers show comparable properties to those of the high-performance unsaturated polyester (UP) resins and show promise as an alternative to replace these petroleum-based materials.
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Polyester-type polymers were efficiently prepared from broccoli seed oil and severalcarboxylic diacids. The polyesters were prepared through a simple two-step process including oxidation of the insaturations to oxiranes followed by ring opening with dicarboxylic acids under basic conditions. Eight polymer materials derived from different fatty diacids (from 5C to 16C) and an aromatic diacid were prepared and characterised. Rubber-type crosslinked biobased materials exhibited low Tg values comprised between-5 and +5°C depending on the diacid type and length.These materials could find applications as they are or as plasticizer when blended with other polymers.