• Applied Chemistry for Engineering
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• v.28 no.1
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• pp.42-49
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• 2017

To replace phthalate plasticizer for PVC, acetylated monoglyceride (AMG) plasticizers were prepared from plant oil and their plasticization effects were also investigated. Transesterification of coconut oil by glycerol followed by acetylation with acetic anhydride gave AMG-CoCo (Coco : Coconut Oil). In addition, AMG-GMO (GMO : Glycerol monooleate) and AMG-GMO-Epoxy were synthesized by acetylation and epoxidation with glycerol monooleate. It was found that the thermal stability of AMG plasticizers increased in the following order: AMG-GMO-Epoxy > AMG-GMO > AMG-CoCo and all three plasticizers were thermally more stable than those of common petroleum-based plasticizer DOP (Dioctyl phthalate). The tensile strain values of the PVC containing AMG compounds were ca. 770~810%, while tensile strength values were ca. 19~22 MPa, which were higher than those of PVC containing DOP. DMA (Dynamic Mechanical Analysis) results showed that the miscibility of AMG-GMO-Epoxy in PVC was excellent and the $T_g$ of PVC containing AMG-GMO-Epoxy at 50 phr decreased down to $24^{\circ}C$. Finally, the leaching experiment result showed that the weight loss values of PVC containing AMG-GMO and AMG-GMO-Epoxy at 50 phr were as low as 2 and 1%, respectively, indicating that they have high water migration resistance. The above findings suggested that AMG-GMO-Epoxy could be one of plant oil-based PVC plasticizers to replace DOP.

• Analytical Science and Technology
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• v.21 no.2
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• pp.135-142
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• 2008

Plasticizer and heavy metals in domestic PVC wallpaper manufactured in Korea after 2005 were analyzed to identify the contained quantity in comparison with the 2002 manufactured PVC wallpapers. Plasticizer of wallpapers was analyzed by the method KSM1991 which uses soxhlet extraction with n-hexane and GC/FID. Heavy metals were pre-treated with 0.07 mol/L hydrochloric acid (HCl) and analyzed by ICP/OES according to the EN 71-part 3 method. DEHP, DINP, DEP, acetyl tributyl citrate were identified from wallpaper. Contents of DEHP, DINP were 0.2~11.3%, 17.9~27.8% respectively in 6 wallpapers, DEP and acetyl tributyl citrate were 1.5%, 8.9% respectively in one wallpaper. Plasticizers have changed from DEHP that has possibility of hazards to DINP, DEP and acetyl tributyl citrate as compared with 2002. Heavy metals were detected under guide line from all of the wallpapers except fire-retardant wallpaper contain antimony. While PVC wallpaper was improved by use of various plasticizer, functional wallpapers such as fire-resistant wallpaper contain high antimony in this study.

• Applied Chemistry for Engineering
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• v.34 no.3
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• pp.252-257
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• 2023

In this study, to replace phthalate-based plasticizers known as endocrine disruptors, compounds as plasticizer candidates were synthesized by using alcohols containing rings and fatty acids extracted from animal and vegetable oils, and their properties as plasticizers, including their plasticization efficiency, were evaluated. Nine compounds synthesized by esterification of fatty acids (caprylic acid, capric acid, lauric acid) and alcohols (solketal, benzyl alcohol, cyclohexanol) were identified by ¹H-NMR. The nine synthetic compounds were evaluated for their plasticity by adding them to PVC resin, and compared with the commercial plasticizers DEHP, DINCH, and ESO. According to the results, plasticization efficiency was 0.96 to 1.02 times higher than DEHP, 0.94 to 0.98 times higher than ESO, and 1.05 to 1.10 times higher than DINCH. Thermal stability was somewhat lower than that of DEHP and DINCH, but showed better results than ESO. The results of the solvent extraction test showed that both aqueous and oily solvents showed higher values than DEHP and DINCH but showed similar or superior properties to ESO.

• The tire
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• s.5
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• pp.17-22
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• 1967

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2005.11a
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• pp.9-12
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• 2005

Molecular characteristics and rheological properties of cellulose acetate butyrate (CAB), cellulose acetate propionate (CAP) and nitrocellulose (GC-519) which are being widely used as propellants were investigated. Their weight-average molecular weight (Mw) and number-average molecular weight (Mn) were estimated via Gel Permeartion Chromatograpy (GPC). Cellulose derivatices were mixed with di-n-propyl adipate (DNPA) which acted as plasticizer in acetone, and then rheological properties of the mixture of cellulose derivatives and this plasticizer in acetone were investigated at $0^{\circ}C$ by rheometer.

• 월간 기계설비
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• s.240
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• pp.48-49
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• 2010

지식경제부 기술표준원이 수도관, 오 배수관, 토목용 하수관으로 광범위하게 사용되는 PVC(폴리염화비닐)관의 품질과 위생기준을 강화해 지난 해 7월 1일부터 납 안정제와 가소제 등의 사용을 금지하고, 위생성 및 장기내구성 등의 품질기준이 강화된 흰색 PVC관을 상 하수도관으로 사용토록 했으나 아직도 이를 제조하거나 시공하고 있어 주의를 촉구하고 나섰다. 이에 따라 PVC관을 수도관, 오 배수관으로 시공하고 있는 설비건설업계의 주의가 요망된다.

• Resources Recycling
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• v.10 no.6
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• pp.3-8
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• 2001

This study was examed about leaching behavior in order to separate plasticizer selectively before dechlorination from flexible PVC material in alkali solutions at $80~120^{\circ}C$. The dechlorination of that was not almost occurred below $100^{\circ}C$. But the yield of elution of plasticizer was 100% above 5M NaOH. Therefore, by controlling alkali concentration and reaction temperature, it is possible to extract the plasticizer selectively without taking dechlorination.

• Elastomers and Composites
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• v.38 no.4
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• pp.342-353
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• 2003

This work is about the development of jet-fuel resistant PVC sealant using a polyester plasticizer. PVC copolymer was compounded with adipic acid glycol(Songcizer P-3000) or DOP plasticizers. Fuel-immersed and non-immersed penetration, solubility, flow, and elongation by tensile adhesion of PVC compounds were measured. Penetration increase by fuel immersion and solubility of PVC compounds with adipic acid glycol polyester plasticizer were smaller than those of PVC compounds with DOP plasticizer. Elongation by tensile adhesion test of PVC compound containing 500 phr of Songcizer P-3000 decreased proportionally to the content of DCDP (dicyclopentadiene) base petroleum resin adhesion promoter. Calcium carbonate($CaCO_3$) filler inhibited the diffusion of fuel in all the PVC compounds and decreased the solubility of PVC compounds containing Songcizer P-3000.

• Journal of Korean Ophthalmic Optics Society
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• v.18 no.1
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• pp.11-17
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• 2013

Purpose: To improve glasses temple's insert processibility of CA/PEG blend, triacetin with higher specific heat values in the processing temperature range is used as second plasticizer. Methods: The total amount of plasticizer is fixed at 30 wt% by CA. To determine optimal CA/PEG/triacetin blend for glasses frame, blends with different composition ratio were examined by various analysis: thermal properties, mechanical properties, glossiness. Results: Specific heat of the CA/PEG blend increased as the content of triacetin. In CA/PEG/triacetin blends, as triacetin concentration is increased, glass transition temperature is decreased and heat conservation rate of composites is increased. Furthermore, CA/PEG/triacetin blend exhibited higher mechanical properties and similar gloss characterization with CA/PEG blend. Conclusions: It is possible to improve the processibility inserting metal support to CA temple through varying the weight ratio of PEG/triacetin. The extruded sheets of CA/PEG/triacetin blend had better glossiness and mechanical properties than those of CA/PEG blend.

• Journal of the Korean Applied Science and Technology
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• v.34 no.4
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• pp.1085-1093
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• 2017

Plasticizers are materials added to give softness and elasticity to plastics having rigid properties to give soft properties as products, and they are mainly added to high molecular materials to give flexibility to improve workability and to improve cold resistance, resistance to volatility and electrical properties. It is used for the purpose. Most plasticizers are inert liquids, similar in function to solvents but with high molecular weight and no volatility. In addition, when dissolved in petrochemical products, only the plasticizer is separated by the matrix effect with other compounds, and qualitative and quantitative analysis. In this study, qualitative and quantitative analysis of DOA and DOP, which are representative components of petrochemical products, were conducted using MD-GC/MS and developed an optimal plasticizer analysis method.