Fatty acid-based monomers as styrene replacements for liquid molding resins
One method of reducing styrene emissions from vinyl ester (VE) and unsaturated polyester resins (UPE) is to replace some or all of the styrene with fatty acid-based monomers. Methacrylated fatty acid (MFA) monomers are ideal candidates because they are inexpensive, have low volatilities, and free-ra...
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| Veröffentlicht in: | Polymer (Guilford) 2004-10, Vol.45 (22), p.7729-7737 |
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| creator | La Scala, John J. Sands, James M. Orlicki, Joshua A. Robinette, E. Jason Palmese, Giuseppe R. |
| description | One method of reducing styrene emissions from vinyl ester (VE) and unsaturated polyester resins (UPE) is to replace some or all of the styrene with fatty acid-based monomers. Methacrylated fatty acid (MFA) monomers are ideal candidates because they are inexpensive, have low volatilities, and free-radically polymerize with vinyl ester. The viscosity of VE resins using these fatty acid monomers ranged from 700–2000cP, which is considerably higher than that of VE/styrene resins (∼100cP). In addition, the Tg of VE/MFA polymers were only on the order of 80°C, which is significantly lower than that of VE/styrene polymers. Decreasing the length of the base fatty acid chains from 18 to 12 carbon atoms improved the Tg by 20°C, while lowing the resin viscosity from ∼2500 to ∼1000cP. Residual unsaturation sites on the fatty acid backbone decreased the cure rate of the resins thereby decreasing polymer properties. Ternary blends of VE, styrene, and fatty acid monomers also effectively improved the flexural, fracture, and thermo-mechanical properties and reduced the resin viscosity to acceptable levels, while using less than 15wt% styrene, far less than commercial VE resins. |
| doi_str_mv | 10.1016/j.polymer.2004.08.056 |
| format | Article |
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Jason ; Palmese, Giuseppe R.</creator><creatorcontrib>La Scala, John J. ; Sands, James M. ; Orlicki, Joshua A. ; Robinette, E. Jason ; Palmese, Giuseppe R.</creatorcontrib><description>One method of reducing styrene emissions from vinyl ester (VE) and unsaturated polyester resins (UPE) is to replace some or all of the styrene with fatty acid-based monomers. Methacrylated fatty acid (MFA) monomers are ideal candidates because they are inexpensive, have low volatilities, and free-radically polymerize with vinyl ester. The viscosity of VE resins using these fatty acid monomers ranged from 700–2000cP, which is considerably higher than that of VE/styrene resins (∼100cP). In addition, the Tg of VE/MFA polymers were only on the order of 80°C, which is significantly lower than that of VE/styrene polymers. Decreasing the length of the base fatty acid chains from 18 to 12 carbon atoms improved the Tg by 20°C, while lowing the resin viscosity from ∼2500 to ∼1000cP. Residual unsaturation sites on the fatty acid backbone decreased the cure rate of the resins thereby decreasing polymer properties. 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Residual unsaturation sites on the fatty acid backbone decreased the cure rate of the resins thereby decreasing polymer properties. 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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Applied sciences Chemical properties Exact sciences and technology Fatty acid monomers Polymer industry, paints, wood Properties and testing Styrene replacements/alternatives Technology of polymers Vinyl esters |
| title | Fatty acid-based monomers as styrene replacements for liquid molding resins |
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