Papers by Keyword: Plasticizer

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Authors: Peng Liu, Fang Yi Li, Jian Feng Li, Kai Kai Guan, Gang Li
Abstract: In order to study the recrystallization of the thermoplastic starch, this paper obtained the IR spectra of starch respectively plasticized by urea, glycerin and glycol. By analytical solutions spectra of vibration frequency of molecular groups, the paper studied the destructive effect of starch crystal structure, and plasticizer to form new hydrogen bonds with starch by hydroxyl group bonded. Excessive plasticizer was not suggested. When the ratio of starch and urea was 102, the thermoplastic starch was excellent in thermoplasticity and hot-workability.
1278
Authors: Hua Feng Zhou, Yong Jin Yang, Jin Son Zhang
Abstract: In this paper, mesoporous MCM-41 and Al-MCM-41(Si/Al =100, 70, 40, 10, 5) molecular sieves were synthesized by direct hydrothermal process and characterized by various analytical techniques. Their catalytic performance in the synthesis of dioctyl phthalate (DOP) was also studied. The results show that while keeping the mesostructure of Al-MCM-41(Si/Al=100, 70, 40), increasing Al content can increase the acidity and so forth effectively improve the catalytic activity. But too much aluminum incorporation can destroy the structure of Al-MCM-41(Si/Al=10). The Al-MCM-41 molecular sieves with proper Si/Al ratios have good catalytic activity and stability in DOP synthesis. When Al-MCM-41(40) was used as the catalyst, A high PA conversion of 98.45% can be reached in 4 h. After being reused for five times, Al-MCM-41(40) still remains good catalytic activity.
1741
Authors: Toshihiro Hirai, Mohammad Ali, Takafumi Ogiwara, Daijiro Tsurumi, Keiichi Yamamoto, Takamitsu Ueki, Hong Xia, Minoru Hashimoto
Abstract: Poly(vinyl chloride) (PVC) has been found to be actuated by applying dc electric field, accompanying colossal strain on the anode surface, particularly when plasticized with large amount of plasticizer [1]. We call the plasticized PVC as PVC gel for convenience in this paper. The deformation has been explained only phenomenologically. However, impedance spectroscopy revealed recently the some fundamental mechanism of the actuation, that is, the deformation depends on the dielectric nature of the materials. The colossal increase of dielectric constant was induced in the gel in the low frequency range. The dependency is strongly depends on the nature of the plasticizer and its content. The phenomena observed as electrical actuation of the PVC gels were (1) Creep deformation on the anode surface, (2) Creep induced bending motion, (3) Tacking to the anode, (4) Contractile deformation, and (5) Vibrational motion by dc electric field application. Creep deformation and the excellent transparency of the gel can be utilized for focus controllable lens. Tacking force can be applied various in combination with bending deformation. Bending actuator has been successfully applied micro-finger actuator and passed for hundreds thousands times continuous operation. In this paper, we will introduce not only the various features of the actuation, but also will get into the some detailed mechanism of the deformation.
1
Authors: Lilis Kistriyani, Achmad Chafidz Mas Sahid, Tintin Mutiara, Dine Olisvia, Lutfa Rahmawati
Abstract: Facial mask is an important part in every beauty treatment because it will give a smooth and gentle effect on the face. This research was done to make edible film that will be applied for face mask. The main ingredient in making this edible film was purple sweet potato powder with the addition of glycerol as plasticizer. One of the ingredients in purple sweet potato was a flavonoid compound. The purpose of this study was to determine the effect of glycerol concentration to flavonoids release, physical properties and biological properties of edible film produced. Two grams of the flour of purple sweet potato and one gram of carragenaan was dissolved in 100 mL of aquadest and were heated at 70°C. They were mixed with 0.3 gram K2SO4 in 50 mL of aquadest. Then, the glycerol were added which the variation of volume 1, 2, and 3 mL. The mixture was dried in the oven at 70°C for 20 hours. The analysis that had been done were spectrophotometer uv-vis analysis to find out how many flavonoids can be released into facial skin, tensile strength analysis and elongation of break analysis, biodegradability analysis, and microbiological analysis. The results of spectrophotometer uv-vis analysis showed that the most flavonoid release concentration was 20.33 ppm in the 2 mL glycerol variation. The best tensile strength value was 8,502 N and the greatest elongation of break value was 14% in 1 mL glycerol variation. In the biodegradability test, the more volume of glycerol added, the faster of the edible film was degraded. The results of microbiological analysis showed that the purple sweet potato extract had the ability to inhibit the growth of Propionibacterium acnes which was seen in the presence of inhibit zone was 18.9 mm.
354
Authors: Qiu Ju Sun, Lin Li, Zhong Li Jiang, Shi Gang Xin, Shi Wei Wu, Li Yu
Abstract: A GC/MS method was established for the determination of phthalates plasticizers in bottled beverages. The calibration curves are all linear in the range of 0.01 to 5μg/L with correlation coefficients greater than 0.997. The recoveries are in the range between 97.27% and 105.05% under two levels. The testing data of the samples showed that the five bottled beverages all contained DBP, DIBP and DEHP plasticizers, and DIBP content was obviously higher than the other two.
590
Authors: Rajni Sharma, Anjan Sil, Subrata Ray
Abstract: In the present work, the effect of Li salt i.e. LiClO4 contained in composite plasticizer (PC+DEC) with three different concentrations on ionic transport and other electrochemical properties of PMMA based gel polymer electrolytes synthesized has been investigated. The electrolytes have been synthesized by solution casting technique by varying the wt (%) of salt and plasticizer. The formation of polymer-salt complexes and their structural characterization have been carried out by FTIR spectroscopic and XRD analyses. The room temperature ionic conductivity of the electrolyte composition 0.6PMMA-0.125(PC+DEC)-0.15LiClO4 (wt %) has been found to be maximum whose magnitude is 0.40×10-5 S/cm as determined by ac impedance analysis. The temperature dependent ionic conductivity of electrolyte sample0.6PMMA-0.125(PC+DEC)-0.15LiClO4 has further been investigated. Thermal analyses of electrolyte samples of all three compositions have also been done.
185
Authors: A.S. Samsudin, M.I.N. Isa
Abstract: Solid biopolymer electrolytes (SBE) comprising carboxymethyl cellulose (CMC) with NH4Br-EC were prepared by solution casting method. The samples were characterized by impedance spectroscopy (EIS) and sample containing 25wt. % of NH4Br exhibited the highest room temperature conductivity of 1.12 x 10-4 S/cm for salted CMC based SBE system. The ionic conductivity increased to 3.31 x 10-3 S/cm when 8 wt. % of ethylene carbonate (EC) was added to the highest conductivity. The conductivity-temperature of plasticized SBE system obeys the Arrhenius relation where the ionic conductivity increases with temperature. The influence of EC addition on unplasticized CMC based SBE was found to be dependent on the number and the mobility of the ions. This results revealed that the influence of plasticizer (EC) which was confirmed play the significant role in enhancement of ionic conductivity for SBE system.
118
Authors: Stanislav Šutliak
Abstract: The degradation of PVC-P membranes in direct contact with bituminous membranes is well known problem. There is also the degradation of PVC-P membranes connected with EPS polystyrene incompatibility. Both bituminous membranes and EPS polystyrene board have been used to determine the differences in signs of PVC-P degradation.
3
Authors: Lin Li, Qiu Ju Sun, Shi Gang Xin, Long Yu, Zhong Li Jiang
Abstract: A method for the simultaneous determination of 15 kinds of phthalate esters in edible oil by gas chromatography-mass spectrometer (GC-MS) was firstly established. The calibration curves showed good linearity in the range of 0.001~1mg /L and the correlation coefficients (r) were more than 0.999. The limits of quantification were in the range of 0.001~ 2.000 μg/L (S/N = 10). The recovery of three level ranged from 70.50% to 112.00%, at spiked levels of 0.1mg/L, 1.0mg/L and 10mg/L with the relative standard deviations (n = 6) of 0.59% ~ 7.54%. On the basis of the above method, the three edible oils under different storage temperatures were detected and the results showed that DIBP, DBP and DEHP were detected in two samples. This method possesses high sensitivity and low detection limit and can be used for quantitative analysis PAEs in edible oils.
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