Papers by Keyword: PVC

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Authors: Yuan Lou Gao, Lian Xia Liu, Jian Li Zheng
Abstract: When extrusion molding, the pressure fluctuations within the nose is the largest problem in the extruder production. In the present, we use mainly to change speed to adjust the pressure fluctuations, but knowledge is still relatively scarce on relation between the speed and pressure. By CFX fluid simulation of flow field distribution in extruder based on PVC production, we obtain the law of pressure with the change of speed, which provide guidance for the control of press inside the extruder.
Authors: Yan Wang, Yao Feng Zhu, Ya Qin Fu
Abstract: In this paper, four models of PVC composites reinforced with glass fabric were designed based on the arrangement of the V-structure, using V-structure discontinuous glass fabric as the sandwich structure and PVC resin as matrix. The acoustic insulation properties of the composites with V-structure discontinuous glass fabric as the sandwich structure were analyzed with a two-channel acoustic analyzer. The results show that the orientation of the V-structure has a strong effect on the acoustic insulation property. In the case where the raw material, thickness and density of the V-PVC composites are almost the same, the composite with the opening of the V-structure toward the source of sound shows better acoustic insulation than that with the opening of the V-structure away from the sound source. This difference is even more pronounced with increasing layers of glass fabric.
Authors: Hui Di Hao, Na Zhu, Yong Gao, Tian Qi Cheng, Jian Yong Lei, Tian Zhai
Abstract: In view of the importance in the national industry of PVC,the subject of the PVC polymerization stirred tank uses finite element analysis software (ANSYS) of the thermodynamic analysis,mainly for the temperature field analysis.By observing the displacement vector image and temperature,the heat transfer capacity is enough, and the heat transfer component selection is reasonable.
Authors: Sun Olapiriyakul
Abstract: The rapid growth of industry has resulted in increased severity of water scarcity in the Eastern region of Thailand over the past decade. The assessment of water use by industrial manufacturing processes located in areas experiencing water stress is necessary to ensure a sustainable water resources management. The objective of this study is to demonstrate the use of life cycle assessment as a tool for assessing water use in an industrial manufacturing process. A case study of S-PVC resin manufacturing process located in Map Ta Phut Industrial Estate, Rayong province, Thailand, is presented. The studying results indicate that the amount of water used to produce 1 Kg of S-PVC resin is 14.72 liters, of which 6.22 liters are withdrawn from local water resources. Additionally, the direct and indirect water use along the production supply chain is accounted for in a streamlined life cycle assessment.
Authors: Jian Zhong Xu, Fei Peng, Yun Hong Jiao
Abstract: Calcium carbonate and zinc hydroxystannate-coated calcium carbonate (ZHSCC) was prepared by biominetic synthesis in template of sodium dodecyl benzene sulfonate (SDBS), and was characterized by XRD, SEM and TG/DSC, moreover, the flame retardant property of ZHSCC in PVC was studed by LOI. The XRD analysis clearly showed the diffraction peaks of zinc hydroxystannate (ZHS) in ZHSCC and calcite crystal structure of calcium carbonate. The TG/DSC and SEM results showed that ZHSCC product was roughly spherical with the size of was about 4 μ. The LOI of PVC/ZHSCC blend increased 5.5 units which showed that ZHSCC had a good flame retardant efficiency for PVC.
Authors: Nik Aisyah Suraya Nik Zulkepeli, Tan Winie, R.H.Y. Subban
Abstract: Polymer electrolyte films of poly (vinyl) chloride (PVC) as polymer host doped with ionic liquid 1-butyl-3-methylimidazolium trifluoromethasulfonate (BMIMCF3SO3) were prepared by solution cast technique. Ionic conductivity was studied for 95 wt.% and 80 wt.% PVC by using Impedance Spectroscopy (IS). Arrhenius and Vogel-Tamman Fulcher (VTF) behavior were observed before and after Tg of the systems. Fourier Transform Infrared (FTIR) study confirmed that complexation occurred between PVC and BMIMCF3SO3.
Authors: Xue Jun Ren, Chun Guang Song, Ming Gao
Abstract: Coal ash as flame retardant was used to PVC, the mechanical properties and flame retardance of the samples were studied. The resultant data show that coal ash better effect on the mechanical properties of the sample, especially tensile strength, impact strength, and 4% of coal ash obtained good flame retardance. PVC treated with flame-retardants showed a high limiting oxygen index, high decomposition temperature, which indicated that the flame retardance of the treated PVC was improved.
Authors: Lei Wang, Run Dong Li, Yan Long Li
Abstract: Thermal degradation of Ethylene Propylene Diene Rubber (EPDM) and PVC have been investigated and compared by means of TG/DTA in air or N2 atmosphere with the heating rate of 10K/min and gas chromatography-mass spectrometry (GC-MS). The occurrence of primary and second thermal degradation stages of EPDM in air have been recognized, while in N2 it was only one stage. The total weight loss ratio in air and N2 was 61.3%, 60.7%, respectively. Three degradation stages of PVC occur in both air and N2 and the total weight loss ratio was 72.5%, 72.6%, respectively. The thermal degradation of EPDM are all endothermic reaction, while of PVC are mainly exothermic reaction. Combustion products heated by laser in the same experimental conditions have been analyzed by GC-MS, the amount of toxic substances differ greatly, the amount of dimethylmethane of PVC are 2.55 times more than EPDM, dimethylbenzene and styrene of PVC are 6.2 and 5.5 times more than EPDM, toluene and benzene of PVC differ greatest with EPDM, are 24.2 and 35.7 times, respectively. EPDM can significantly reduce toxic products generation compared with PVC.
Authors: Yi Heng Lu, Wei Long Liu, Feng Wei, Shuang Chun Ma
Abstract: Thermal degradation reaction kinetics of PVC stabilized by barium stearate were studied by means of the non-isothermal weight-loss technique under a nitrogen atmosphere. The results show that the lowest decomposition temperature is greater than 203.6°C and 217.2°C in the conversion rate of 5% and 10% respectively. When the heating rate β is 10°C/min, at 200°C and 225°C the remaining mass from the sample with barium stearate was 99.1% and 95.3%, respectively. The thermal decomposition process occurred in three stages, the results calculated by various methods show that the average apparent activation energy in first, second and third phase is 79.88kJ/mol, 89.37kJ/mol and 187.34kJ/mol respectively. In the initial reaction ( α<18%), as heating rate is 20°C/min, the decomposition reaction is controlled by the (A1.5) mechanism.
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