scholarly journals Replacing Di(2-ethylhexyl) Terephthalate by Di(2-ethylhexyl) 2,5-Furandicarboxylate for PVC Plasticization: Synthesis, Materials Preparation and Characterization

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2336 ◽  
Author(s):  
Marina Matos ◽  
Rosemeyre A. Cordeiro ◽  
Henrique Faneca ◽  
Jorge F. J. Coelho ◽  
Armando J. D. Silvestre ◽  
...  
Keyword(s):  
Weight Loss ◽  
Mechanical Characterization ◽  
Elongation At Break ◽  
Plasticized Pvc ◽  
Poly Vinyl Chloride ◽  
Low Weight ◽  
Furandicarboxylic Acid ◽  
First Time ◽  
Phosphate Buffered Saline

The worldwide regulatory demand for the elimination of non-phthalate compounds for poly(vinyl chloride) (PVC) plasticization has intensified the search for alternatives. Concomitantly, sustainability concerns have highlighted sugar-based 2,5-furandicarboxylic acid as one key renewable-chemical for the development of several products, namely di(2-ethylhexyl) 2,5-furandicarboxylate (DEHF) plasticizer. This study addresses the use of DEHF under a realistic scenario of the co-existence of both DEHF and entirely fossil-based plasticizers. More precisely, original PVC blends using mixtures of non-toxic DEHF and di(2-ethylhexyl) terephthalate ester (DEHT) were designed. The detailed structural, thermal, and mechanical characterization of these materials showed that they all have a set of interesting properties that are compatible with those of commercial DEHT, namely a low glass transition (19.2–23.8 °C) and enhanced elongation at break (up to 330%). Importantly, migration tests under different daily situations, such as for example exudation from food/beverages packages and medical blood bags, reveal very low weight loss percentages. For example, in both distilled water and phosphate buffered saline (PBS) solution, weight loss does not exceed ca. 0.3% and 0.2%, respectively. Viability tests show, for the first time, that up to 500 μM of DEHF, a promising cytotoxic profile is observed, as well as for DEHT. Overall, this study demonstrates that the combination of DEHF and DEHT plasticizers result in a noticeable plasticized PVC with an increased green content with promising cytotoxic results.

Effect of Gamma Irradiation on the Migration of Di(2-Ethylhexyl) Phthalate from Plasticized Poly(Vinyl Chloride) into Air and PVC Resin

2014 ◽  
Vol 1015 ◽  
pp. 397-400
Author(s):  
Qin Wang ◽  
Wei Wu ◽  
Yan Fang Tang ◽  
Jian Jian Bian ◽  
Song Wei Zhu
Keyword(s):  
Weight Loss ◽  
Diffusion Coefficient ◽  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Vinyl Chloride ◽  
Plasticized Pvc ◽  
Poly Vinyl Chloride ◽  
Ethylhexyl Phthalate

The risk of di (2-ethylhexyl) phthalate (DEHP) migration from plasticized poly (vinyl chloride) (PVC) is an important issue for patients.We present a study on the effect of gamma radiation on the migration of DEHP from plasticized PVC into air and PVC as a function of time (0-28day) at 75°C.The samples were irradiated at dose of 25 kGy using a 60Co gamma radiation source.The change of weight loss at 75°C was studied as a function of time.Diffusion coefficient of samples was calculated,it was found that the diffusion coefficient significant increased after irradiation,the sample having ESO exhibited an decrease trend of DEHP migration,which shown that ESO can effectively impress the migration of DEHP from plasticized PVC either in control or irradiate samples,the same Phenomenon was found in air and PVC.The diffusion coefficient was between 8.37×10-11 and 2.68×10-10 cm2/s in air, 8.87×10-8 and 9.99×10-8 cm2/s in PVC.

scholarly journals Polymer Composites Based on Plasticized PVC and Vulcanized Nitrile Rubber Waste Powder for Irrigation Pipes

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Maria Daniela Stelescu
Keyword(s):  
Polymer Composites ◽  
Accelerated Aging ◽  
Nitrile Rubber ◽  
Elongation At Break ◽  
Plasticized Pvc ◽  
Rubber Waste ◽  
Irrigation Pipes ◽  
Agricultural Use ◽  
Ozone Resistance

The paper presents the technique of production and characterization of polymer composites based on plasticized PVC and rubber powder from vulcanized nitrile rubber waste. The new polymer composites have lower hardness, higher elongation at break, a better tensile strength, and better ozone resistance, and the blend suitable for irrigations pipes for agricultural use was selected. The selected polymer composites have a good behavior under accelerated aging, repeated flexion at room temperature and at low temperature (−20°C), a very good behavior for immersion in water, concentrated acid and basis, animal fat, soya, and sun flower oil, proving their suitability for gaskets, hoses, protection equipment, rubber footwear, and so forth. The resulted thermoplastic polymer composites can be processed by injection, extrusion, and compression molding.

scholarly journals A novel biobased polyester plasticizer prepared from palm oil and its plasticizing effect on poly (vinyl chloride)

2016 ◽  
Vol 18 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Puyou Jia ◽  
Meng Zhang ◽  
Lihong Hu ◽  
Yonghong Zhou
Keyword(s):  
Palm Oil ◽  
Condensation Reaction ◽  
Melting Behavior ◽  
Electron Cloud ◽  
Plasticized Pvc ◽  
Degradation Temperature ◽  
Poly Vinyl Chloride ◽  
New Type ◽  
First Time ◽  
Biobased Polyester

Abstract In this study, palm oil was the first time to convert into a novel polyester plasticizer for polyvinyl chloride (PVC). In the first stage, palm oil was converted into palm oil monoglyceride (POM) by alcoholysis with glycerol. Next, a novel palm oil monoglycerides based polyester plasticizer (POMP) was synthesized from POM and maleic anhydride through esterification and condensation reaction. The structure of POMP was characterized with FTIR, 1H NMR and GPC. Then PVC blends were prepared using POMP as a plasticizer, melting behavior, thermal property, compatibility, mechanical properties and mechanism of plasticization of PVC blends were systematically studied. Melting behavior indicated that POMP could decrease the torque and the melt viscosity of PVC blends that was conducive to process. With the content of POMP increasing from 5 g to 15 g in PVC blends, the plasticized PVC blends demonstrated better compatibility, the degradation temperature (Td) increased from 252.6°C to 257.0°C, the glass transition temperature (Tg) decreased from 55°C to 49.5°C. Plasticization was put into effect by interaction of the electron cloud between the PVC chain and POMP molecule. This study may lead to the development of new type of PVC plasticizer based on vegetable oil.

Plasticization of Poly(Vinyl Chloride) by Non-Carcinogenic Bio-Plasticizers

2020 ◽  
Vol 862 ◽  
pp. 99-103
Author(s):  
Nawadon Petchwattana ◽  
Paramaporn Kerdsap ◽  
Benjatham Sukkaneewat
Keyword(s):  
Vinyl Chloride ◽  
Tensile Elongation ◽  
Molecular Size ◽  
Mechanical Analysis ◽  
Elongation At Break ◽  
Plasticized Pvc ◽  
Poly Vinyl Chloride ◽  
Molecular Sizes ◽  
Pvc Compositions

In this paper, three different plasticizer molecular sizes namely; glycerol (C3), tributyrin (C15) and trilaurin (C32) was used as non-carcinogenic plasticizers in poly(vinyl chloride) (PVC). The experimental results indicated that all the plasticizers play an important role of PVC toughening. Among of these plasticizers, tributyrin was the most effective for PVC plasticization due to its suitable molecular size. With the presence of tributyrin, PVC was found to tougher and softer which reflected as the increased tensile elongation at break, impact strength and the decreased tensile strength. Morphological study by scanning electron microscope (SEM) exhibited the localized plastic deformations in PVC/plasticized with 15 phr tributyrin. Dynamic mechanical analysis (DMA) showed some shifts of the glass transition temperature (Tg) for all the plasticized PVC compositions. The maximum shift was found when PVC was blended with 15 phr tributyrin. Migration test showed that the plasticizers were easily migrated in ethanol. For the migration in water, it did only slightly.

scholarly journals Thermal and Mechanical Characterization of Drawn Polypropylene Fibres

2021 ◽  
Vol 1199 (1) ◽  
pp. 012029
Author(s):  
V Krmelová ◽  
M Gavendová ◽  
J Krmela ◽  
P Skalková ◽  
E Loksik
Keyword(s):  
Mechanical Properties ◽  
Melt Spinning ◽  
Mechanical Characterization ◽  
Scanning Calorimetry ◽  
Polypropylene Fibres ◽  
Elongation At Break ◽  
Melting Temperatures ◽  
Cycle Loading ◽  
Melt Spinning Technique

Abstract The main objective of this work was to investigate the effect of different cellulose (CEL) content and the draw ratio on the thermal and mechanical properties of drawn polypropylene (PP) fibres. The modification of PP fibres during their production can helps to prepare PP fibres with improved properties, guarantees new opportunities for the expansion of an assortment of PP fibres in the clothing and domestic textile industries. The modified PP/CEL fibres were prepared from PP pellets and PP/cellulose masterbatch via the melt spinning technique at 260 °C followed by drawing for various draw ratios in the company Chemosvit, Fibrochem a. s. (Svit, Slovakia). Differential scanning calorimetry (DSC) was used to evaluate the thermal properties of PP fibres. The mechanical properties (tenacity and elongation at break and modulus of elasticity) and low cycle loading of modified PP fibres were also studied. The obtained experimental results of drawn PP/CEL fibres were compared with neat PP fibre prepared under the same technological conditions. Cellulose had a minimal effect on the melting temperatures of fibres and increased of the PP crystallization temperatures in comparison with the neat drawn PP fibre. The limited decrease of mechanical properties of prepared fibres were observed, but the decreases do not influence on the fibres commercial use.

scholarly journals Raman Spectroscopy as a Novel Method for the Characterization of Polydioxanone Medical Stents Biodegradation

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5462
Author(s):  
Jan Loskot ◽  
Daniel Jezbera ◽  
Aleš Bezrouk ◽  
Rafael Doležal ◽  
Rudolf Andrýs ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectra ◽  
Hydrolytic Degradation ◽  
Biodegradable Stents ◽  
Ft Ir ◽  
Novel Method ◽  
First Time ◽  
Phosphate Buffered Saline ◽  
Ft Ir Spectroscopy

Polydioxanone (PPDX), as an FDA approved polymer in tissue engineering, is an important component of some promising medical devices, e.g., biodegradable stents. The hydrolytic degradation of polydioxanone stents plays a key role in the safety and efficacy of treatment. A new fast and convenient method to quantitatively evaluate the hydrolytic degradation of PPDX stent material was developed. PPDX esophageal stents were degraded in phosphate-buffered saline for 24 weeks. For the first time, the changes in Raman spectra during PPDX biodegradation have been investigated here. The level of PPDX hydrolytic degradation was determined from the Raman spectra by calculating the area under the 1732 cm−1 peak shoulder. Raman spectroscopy, unlike Fourier transform infrared (FT-IR) spectroscopy, is also sensitive enough to monitor the decrease in the dye content in the stents during the degradation. Observation by a scanning electron microscope showed gradually growing cracks, eventually leading to the stent disintegration. The material crystallinity was increasing during the first 16 weeks, suggesting preferential degradation of the amorphous phase. Our results show a new easy and reliable way to evaluate the progression of PPDX hydrolytic degradation. The proposed approach can be useful for further studies on the behavior of PPDX materials, and for clinical practice.

TBE in Sweden

2020 ◽  
Keyword(s):  
Genetic Characterization ◽  
Immunoglobulin M ◽  
Enzyme Linked Immunosorbent Assay ◽  
Second Phase ◽  
Serum Samples ◽  
Tick Borne Encephalitis ◽  
Specific Immunoglobulin ◽  
Tick Borne Encephalitis Virus ◽  
First Time

Tick-borne encephalitis virus (TBEV) was isolated for the first time in Sweden in 1958 (from ticks and from 1 tick-borne encephalitis [TBE] patient).1 In 2003, Haglund and colleagues reported the isolation and antigenic and genetic characterization of 14 TBEV strains from Swedish patients (samples collected 1991–1994).2 The first serum sample, from which TBEV was isolated, was obtained 2–10 days after onset of disease and found to be negative for anti-TBEV immunoglobulin M (IgM) by enzyme-linked immunosorbent assay (ELISA), whereas TBEV-specific IgM (and TBEV-specific immunoglobulin G/cerebrospinal fluid [IgG/CSF] activity) was demonstrated in later serum samples taken during the second phase of the disease.

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