Preparation and properties of LGF/ER/TPU/PMMA composites

2015 ◽  
Vol 22 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Jianbing Guo ◽  
Daohai Zhang ◽  
Huiju Shao ◽  
Kaizhou Zhang ◽  
Bin Wu
Keyword(s):  
Mechanical Properties ◽  
Thermoplastic Polyurethane ◽  
Testing Machine ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Universal Testing ◽  
Long Glass Fiber ◽  
Scanning Frequency ◽  
Morphology And Mechanical Properties ◽  
Scanning Electron

AbstractA series of long glass fiber (LGF)-reinforced epoxy resin (ER), thermoplastic polyurethane (TPU) elastomers, and poly(methyl methacrylate) (PMMA) composites were prepared by using self-designed impregnation device. Dynamic mechanical properties of the LGF/ER/TPU/PMMA composites have been investigated by using dynamic mechanical thermal analysis (DMA). The results indicated that the content of PMMA and TPU and scanning frequency had important influence on dynamic mechanical properties and glass transition of the LGF/ER/TPU/PMMA composites. In addition, the Arrhenius relationship has been used to calculate the activation energy of α-transition of the LGF/ER/TPU/PMMA composites. The thermal properties of the LGF/ER/TPU/PMMA composites were studied by thermogravimetric analysis (TGA). Morphology and mechanical properties of the composites are investigated by scanning electron microscopy (SEM), a universal testing machine, and a ZBC-4 Impact Pendulum.

Effects of poly(styrene-co-maleic anhydride) on the performance of LGF/TPU/ABS composites

2016 ◽  
Vol 23 (5) ◽  
pp. 475-480 ◽  
Author(s):  
Wulei Zhou ◽  
Jian Xiao ◽  
Fang Liu ◽  
Shuhao Qin
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Glass Fiber ◽  
Thermoplastic Polyurethane ◽  
Testing Machine ◽  
Acrylonitrile Butadiene Styrene ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber

AbstractA series of long glass fiber-reinforced thermoplastic polyurethane (TPU) elastomers and acrylonitrile-butadiene-styrene (ABS) copolymer (LGF/TPU/ABS) composites were prepared using self-designed impregnation device. Poly(styrene-co-maleic anhydride) was employed to increase the compatibility between glass fiber and matrix resin and thus obtain the excellent properties of composites. The dynamic mechanical properties of the composites have been investigated using dynamic mechanical thermal analysis. The results indicated that the storage modulus of the composites gradually increases and then decreases with increasing compatibilizer content. In addition, the low temperature peak of the composites shifts to higher temperature with increasing compatibilizer content. The thermal properties of the composites were studied by thermogravimetric analyzer. In addition, the morphology and mechanical properties of the composites are investigated by scanning electron microscopy, a universal testing machine, and a ZBC-4 Impact Pendulum.

Morphology, Thermal, Dynamic Mechanical and Mechanical Properties of Long Glass Fiber Reinforced Thermoplastic Polyurethane Elastomers and Polyvinyl Chloride Composites

2014 ◽  
Vol 941-944 ◽  
pp. 266-274 ◽  
Author(s):  
Kai Zhou Zhang ◽  
Qiang Guo ◽  
Bang Sheng You
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Heat Resistance ◽  
Glass Fiber ◽  
Thermoplastic Polyurethane ◽  
Dynamic Mechanical ◽  
Long Glass Fiber ◽  
Master Batch ◽  
Scanning Electron

Thermoplastic polyurethane elastomer (TPU) and long glass fiber (LGF) were used to prepare LGF/TPU master batch for increasing the mechanical properties and heat resistance of PVC. It turned out that addition of LGF/TPU contributed to improvement in toughness of PVC but the heat resistance of PVC didn’t increase very evidently. The heat resistance and morphology were observed by vicat test and scanning electron microscopy, respectively. The scanning electron microscopy (SEM) proved that incorporation of LGF/TPU into PVC changed the morphology of the composites and correlated well with the mechanical properties. Dynamic mechanical analysis (DMA) showed that both the glass transition temperature and the storage modulus of PVC increased with the addition of LGF/TPU master batch; the presence of a single Tg indicated that each component of composites was miscible. In this study, the combination properties of the composites with 24wt% LGF was the best proportion in the range of 0-30 phr LGF, because it had the best mechanical properties and heat resistance.

scholarly journals Styrene–Acrylic Emulsion with “Transition Layer” for Damping Coating: Synthesis and Characterization

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1406
Author(s):  
Daoyuan Chen ◽  
Mingjin Ding ◽  
Zhixiong Huang ◽  
Yanbing Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Transition Layer ◽  
Testing Machine ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Latex Film ◽  
Seeded Emulsion Polymerization ◽  
Acrylic Emulsion ◽  
Dynamic Mechanical

In order to study the dynamic mechanical properties of styrene–acrylic latex with a core/shell structure, a variety of latexes were synthesized by semi-continuous seeded emulsion polymerization based on “particle design” with the same material. The latexes were characterized by rotary viscosimeter, dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), dynamic mechanical analysis (DMA), and universal testing machine. The effects of difference at the glass transition temperature (Tg) of core and shell and the introduction of the “transition layer” on the damping and mechanical properties of latex film were studied. The results indicate that as the Tg of core and shell gets closer, the better the compatibility of core and shell, from phase separation to phase continuity. Furthermore, the introduction of the “transition layer” can effectively improve the tensile strength and tan δ (max) of the latex film. The tensile strength and maximum loss factor (f = 1 Hz) of latex with the “transition layer” increased by 36.73% and 29.11% respectively compared with the latex without the “transition layer”. This work provides a reference for the design of emulsion for damping coating.

scholarly journals Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 44 ◽  
Author(s):  
Changming Zhang ◽  
Anle Mu ◽  
Yun Wang ◽  
Hui Zhang
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Flow Stress ◽  
Yield Strength ◽  
Constitutive Model ◽  
Testing Machine ◽  
Dynamic Mechanical Properties ◽  
Stress Strain ◽  
Dynamic Mechanical ◽  
Different Temperatures

In order to investigate the static and dynamic mechanical properties of TC18 titanium alloy, the quasi-static stress–strain curve of TC18 titanium alloy under room temperature was obtained by DNS 100 electronic universal testing machine (Changchun Institute of Mechanical Science Co., Ltd., Changchun, China). Meanwhile, the flow stress–strain curves under different temperatures and strain rates are analyzed by split Hopkinson pressure bar (SHPB) device with synchronous assembly system. On the basis of the two experimental data, the JC constitutive model under the combined action of high temperature and impact load is established using the linear least squares method. The results show the following: the yield strength and flow stress of TC18 titanium alloy increase slowly with the increase of the strain rate, and the strain value corresponding to the yield strength is reduced. With the increase of strain, the flow stress increases at first and then decreases at different temperatures. The strain value corresponding to the transition point rises with the temperature increase, and the corresponding stress value remains basically unchanged. With the increase of experimental temperature, the flow stress shows a downward trend, and the JC constitutive model can predict the plastic flow stress well.

Studies on Friction and Mechanical Properties of High Density Polypropylene (HDPP) Filled with Modified Talc

2012 ◽  
Vol 624 ◽  
pp. 279-282
Author(s):  
Feng Zhan ◽  
Nan Chun Chen
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Lamellar Structure ◽  
Testing Machine ◽  
High Density ◽  
Impact Testing ◽  
Wear Testing ◽  
Frictional Surface ◽  
Universal Testing ◽  
Scanning Electron

Talc was modified by aluminate coupling agent (ACA) before filling it into high density polypropylene (HDPP) to prepare talc/HDPP composites. Scanning electron microscopy (SEM), wear testing machine, electronic universal testing machine, and impact testing machine were used to analyze the surface modification and the effects of modified talc on friction and mechanical properties of modified talc/HDPP composites. The results indicate that after modified the lamellar structure of talc particles are open and the dispersion of particles are improved, and the edges and corners of surface become softer. Friction properties indicate that when the talc content is 8 wt%, both µ and K are at a lower value, which show that have better wear resistance. The frictional surface is relatively smooth and no furrow trace has found. Mechanical properties show that with talc content increasing, tensile strength and flexural strength of composites increase.

Effects of EVA-g-MAH on Mechanical Properties and Morphological Structure of TPU/PVC Blends

2012 ◽  
Vol 602-604 ◽  
pp. 656-659
Author(s):  
Gao Shuang Huang ◽  
Song Bai Lin ◽  
Qing Hai Zhang ◽  
Da Gang Li ◽  
Yun Long Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Thermoplastic Polyurethane ◽  
Phase Interface ◽  
Morphological Structure ◽  
Ethylene Vinyl Acetate ◽  
Dynamic Mechanical Properties ◽  
Poly Vinyl Chloride ◽  
Thermal Stability Of ◽  
Scanning Electron

The effects of ethylene vinyl acetate grafting maleic anhydride (EVA-g-MAH )as a compatilizer on the mechanical properties, compatibility and morphological structure of thermoplastic Polyurethane and poly(vinyl chloride) blends were studied. The blends were prepared and characterized by mechanics properties test, scanning electron microscopy(SEM,)dynamic mechanical properties (DMA) and thermogravimetry(TG) . Mechanical properties indicate that the hardness, tensile strength, breaking elongation of the blends are greatly improved by EVA-g-MAH, when the critical EVA-g-MAH content at about 4 wt%.SEM micrographs reveal that EVA-g-MAH could bring down the diameter of dispersed , change brittle fracture into ductile fracture, and promote adhesion of phase interface. The glass transition temperature change by DMA proves that the addition of the EVA-g-MAH improved the compatibilization of blends. And the results of TG experiment show that EVA-g-MAH greatly improve the thermal stability of the blends.

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