Preparation and Applications of Compatibilizer in HPVC/EPDM

The graft copolymer EPDM-g-MMA was synthesized and its compatibilization property for HPVC/EPDM blending materials was studied in this paper. The synthesis conditions were investigated, results showed that the optimum solvent was the mixture of toluene and n-heptane with volume ratio of 1:1; the optimum conditions were reaction temperature of 80°C, time of 7 hours, initiator BPO was 0.12% and monomer MMA was 12%. The synthesis product was characterized by infrared spectroscopy and showed that EPDM-g-MMA grafting copolymer was obtained. The mechanical property of HPVC/EPDM blending materials increased greatly with an increase of compatibilizer content, compared with HPVC/EPDM material with no compatibilizer, when the dosage of EPDM-g-MMA was 9%, the tensile strength of the system increased from 6.8 MPa to 13.65 Mpa, and elongation at break increased from 175.23% to 347.31%.

Download Full-text

Modification of Polyurethane by Tung Oil Anhydride-Ester Polyol

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.554-556.191 ◽

2012 ◽

Vol 554-556 ◽

pp. 191-194 ◽

Cited By ~ 1

Author(s):

Han Zhou Sun ◽

Xun Jun Du ◽

Jin Hua Zhou ◽

Lian Wu Xie ◽

Yu Xiong Wu ◽

...

Keyword(s):

Mechanical Property ◽

Tensile Strength ◽

Heat Resistance ◽

Hard Segment ◽

Soft Segment ◽

Morphological Structure ◽

Elongation At Break ◽

Tung Oil ◽

Synthetic Resins ◽

The World

Polyurethane (PU), one of the six main categories of synthetic resins, has been used extensively in industry all over the world. Tung oil anhydride-ester polyol (TOAEP), prepared from the China special vegetable oil, Tung oil, was introduced into PU structure. The mechanical property, heat-resistance and morphological structure of the modified PU were studied. Experimental results showed that the hardness and tensile strength of the modified PU increases as the dose of TOAEP increasing while the elongation at break decreases, and the heat-resistance has been improved after modification. The modified PU’s hard segment phase is compatible with the soft segment phase.

Download Full-text

Preparation and Properties of DCP-Crosslinked Biobased Polyamide

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.634-638.1037 ◽

2013 ◽

Vol 634-638 ◽

pp. 1037-1043 ◽

Cited By ~ 1

Author(s):

Xiao Xue ◽

Qing Xiu Jia ◽

Guo Liang Zhao

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Infrared Spectroscopy ◽

Cross Linking ◽

Dicumyl Peroxide ◽

Elongation At Break ◽

Gel Content ◽

Dose Ranging ◽

The Cross ◽

Higher Doses

In this work, a new bio-based hybrid polyamide (BDIS) was prepared and was cross-linked by dicumyl peroxide (DCP) with dose ranging from 1 to 7%. The state of cure was observed in vulcameter, and the vulcanization condition was determined subsequently. The cross-linking efficiency of BDIS/DCP blends was assessed using torque, gel content measurements and infrared spectroscopy (FTIR). DCP dose below 1% was not sufficient to reach gelation. Over 1%, the gel content increased with increasing DCP dose. The cross-linked BDIS films exhibited enhanced toughness and mechanical properties compared to precursors. Optimal mechanical properties were obtained with concentration of about 5 wt % DCP. At higher doses, the tensile strength and the elongation at break were decreased due to scission reactions.

Download Full-text

Copolymerization of Propylene Oxide and Carbon Oxide Catalyzed by Nano SalenCoCl Complex

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.703.17 ◽

2014 ◽

Vol 703 ◽

pp. 17-20

Author(s):

Jing Tian ◽

Sai Dan Zhang ◽

Qing Zhang ◽

Ming Zhe Liu ◽

Yan Guo Wang

Keyword(s):

Nuclear Magnetic Resonance ◽

Infrared Spectroscopy ◽

Reaction Time ◽

Magnetic Resonance ◽

Reaction Temperature ◽

Propylene Oxide ◽

Carbon Oxide ◽

Resonance Spectroscopy ◽

Optimum Conditions ◽

Temperature And Pressure

In this investigation, nanoSchiff bases Cobaltic complex was synthesized and used as the initiator in the copolymerization of carbon oxide and propylene oxide (PO). The nanoCobaltic complex was characterized by infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). The influences of different factors, including reaction time, reaction temperature, and pressure of CO2 on the synthesis of polycarbonate were described. The results show that nanoCobaltic complex could be successfully applied in the copolymerization of CO2 and PO. The optimum conditions of the polymerization, which include CO2 pressure of 30 bar, reaction temperature of 80 °C, and reaction time of 3 hours.

Download Full-text

Switchable-Hydrophilicity Triethylamine: Formation and Synergistic Effects of Asphaltenes in Stabilizing Emulsions Droplets

Materials ◽

10.3390/ma11122431 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2431 ◽

Cited By ~ 4

Author(s):

Xingang Li ◽

Jinjian Hou ◽

Hong Sui ◽

Lingyu Sun ◽

Lin Xu

Keyword(s):

Nuclear Magnetic Resonance ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Synergistic Effects ◽

Volume Ratio ◽

Injection Rate ◽

Co2 Injection ◽

Synthesis Conditions ◽

13C Nuclear Magnetic Resonance ◽

Oil Water

In this study, SHT (switchable-hydrophilicity triethylamine, [Et3NH]·[HCO3]) has been synthesized and instrumentally characterized by Fourier transform–infrared spectroscopy (FTIR) and 13C nuclear magnetic resonance (NMR). The operational synthesis conditions of SHT were optimized and determined at 25 °C, Et3N/H2O volume ratio of 1:2 and CO2 injection rate at 300 mL/min. When it was used to extract heavy oil from unconventional oil ore, it was found that it could break maltenes-in-water emulsions. When asphaltenes were present in the oil phase, it was observed that SHT could cooperate with asphaltenes. These results indicated that SHT works with asphaltenes, leading to synergistic effects in stabilizing oil–water (o/w) emulsions.

Download Full-text

Influence of the Particle Size of LDPE on the Performance of Cu/LDPE Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.833.330 ◽

2013 ◽

Vol 833 ◽

pp. 330-334

Author(s):

Ying Tang ◽

Yun Wang ◽

Xian Ping Xia

Keyword(s):

Mechanical Property ◽

Molecular Weight ◽

Particle Size ◽

Tensile Strength ◽

Elasticity Modulus ◽

Micro Structure ◽

Elongation At Break ◽

Surface Hydrophilicity ◽

The Difference ◽

Ldpe Composites

The Cu/LDPE composites were characterized through the tests of micro-structure, mechanical property, surface hydrophilicity and releasing rate of cupric ions, in order to study the influence of the particle size of LDPE on the performance of Cu/LDPE composites. The results indicate that, with decreasing of the particle size of LDPE, Cu/LDPE composites have greater value of elongation at break and releasing rate of cupric, but smaller value of tensile strength and elasticity modulus, and the influence on surface hydrophilicity and crystalline is little. It is considered that the influence of the particle size of LDPE on the performance of Cu/LDPE composites results from the difference of both the molecular weight of LDPE and the dispersion uniformity of copper in LDPE.

Download Full-text

SINTESIS DAN MODIFIKASI STRUKTUR DAN PORI MEMBRAN KITOSAN TERCROSSLINK UNTUK STERILISASI MEDIA PERTUMBUHAN BAKTERI

Sains & Teknologi ◽

10.24123/jst.v3i2.2283 ◽

2019 ◽

Vol 3 (2) ◽

pp. 27

Author(s):

Emma Savitri ◽

Natalia Suseno ◽

Tokok Adiarto

Keyword(s):

Tensile Strength ◽

Chitosan Solution ◽

Curing Temperature ◽

Growth Media ◽

Optimum Conditions ◽

Separation Processes ◽

Crosslinking Process ◽

Chitosan Membrane ◽

Chitosan Membranes ◽

Crosslinked Chitosan

Many mass-transfer applications have used chitosan membrane in separation processes. This research applied crosslinked chitosan membrane to sterillize bacterial growth media. Chitosan membranes having 79 % DD were produced by casting and drying chitosan solution. The images of the membrane were characterized by SEM and other characterizations such as permeability, permselectivity and tensile strength were investigated. The flux increased with longer submersion period but the rejection decreased. Otherwise, the flux decreased and rejection increased in line with an increase in curing temperature. Tensile strength increased with the increase of submersion period and curing temperature. The optimum conditions of crosslinking process are 2 hours of submersion periods and curing temperature at 90 oC. It gives flux 5.8930 L/jam.m2, rejection 97.47 % and tensile strength 49640 kN/m2

Download Full-text