Rheological Properties of PTT/POE/OMMT Composites

2010 ◽  
Vol 150-151 ◽  
pp. 834-837
Author(s):  
Ming Tao Run ◽  
Li Jie Guo ◽  
Qing Chang Zhang ◽  
Yu Zhong ◽  
Qing Han ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Solution Method ◽  
Mixed Solution ◽  
Melt Blending ◽  
Capillary Rheometer ◽  
Flow Activation Energy ◽  
Twin Screw ◽  
Flow Activation ◽  
Trimethylene Terephthalate ◽  
Poly Ethylene

Poly(ethylene-octene)(POE) and organic montmorillonite(OMMT) acting respectively as the toughening agents and reinforcing agents, were used to prepare nanocomposites with Poly(trimethylene terephthalate)(PTT) in order to modify PTT, and the rheological properties of these composites were investigated by using capillary rheometer instrument. The OMMT used in composite was prepared by intercalating triphenyl phosphate (TPP) into MMT by mixed solution method. PTT/POE/OMMT nanocomposites were prepared by melt blending in twin-screw corotating extruder. Rheological results show that PTT/POE/OMMT composite melt was pseudo-plastic liquid and the pseudo-plasticity of the melt was decreased with increasing OMMT content for the strong interface interactions between OMMT and polymer molecular chains. The melt apparent viscosity was increased with increasing OMMT content. The flow activation energy results suggested that the composite melt having more OMMT components is more sensitive to the change of temperature.

Study on Structure and Rheological Properties of PET/PTT/MMT Nanocomposites

2011 ◽  
Vol 233-235 ◽  
pp. 1814-1818
Author(s):  
Li Yan Wang ◽  
Shan Li ◽  
Guang Li
Keyword(s):  
Rheological Properties ◽  
Flow Behavior ◽  
Flow Property ◽  
X Ray Diffraction ◽  
Flow Activation Energy ◽  
Poly Ethylene Terephthalate ◽  
Twin Screw ◽  
Poly Ethylene ◽  
Lower Temperature ◽  
Increasing Temperature

Poly(ethylene terephthalate)(PET)/poly(trimethylene terephthalate)(PTT) /Montemorillonite(MMT) nanocomposites were prepared by melt blending through a co-rotating twin screw extruder. The wide angle X-ray diffraction(WAXD) patterns proved the nanocomposites formed exfoliated or intercalated structures. The rheological properties of PET/PTT/MMT were studied by RH2000 capillary rheometer. The results show that PET/PTT and PET/PTT/MMT melts are all pseudo-plastic fluids, and the addition of one to five part MMT can obviously improve the flow property of PET/PTT melt. The apparent viscosity (ηa) of the nanocomposite melts is lower than that of PET/PTT melt, and their flow behavior is better than that of PET/PTT melt, so the nanocomposites can be processed at lower temperature. The viscous flow activation energy(ΔEη) of the nanocomposite melts is higher than that of PET/PTT melt, and it is more proper for the nanocomposite melts to improve their flow properties by increasing temperature.

Toughening Modification of Poly(butylene terephthalate)/Polycarbonate Blends by Poly(ethylene-co-octene)

2005 ◽  
Vol 13 (4) ◽  
pp. 385-394
Author(s):  
Huiyu Bai ◽  
Yong Zhang ◽  
Yinxi Zhang ◽  
Xiangfu Zhang ◽  
Wen Zhou
Keyword(s):  
Average Diameter ◽  
Melt Blending ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Bisphenol A Polycarbonate ◽  
Elongation At Break ◽  
Butylene Terephthalate ◽  
Twin Screw ◽  
Poly Ethylene ◽  
The Impact

New toughened poly(butylene terephthalate) (PBT)/bisphenol A polycarbonate (PC) blends were obtained by melt blending with commercial poly(ethylene-co-octene) copolymer (POE), varying the POE content up to 10 wt%, in a twin screw extruder, followed by injection moulding. The influence of POE on the properties of the PBT/PC blends was investigated in terms of mechanical testing, dynamic mechanical thermal (DMTA) analysis, differential scanning calorimetry (DSC), and scanning electronic microscopy (SEM). The results showed that addition of POE led to remarkable increases in the impact strength, elongation at break and Vicat temperature, and a reduction in the tensile strength and flexural properties of PBT/PC blends. The morphology of the blends was observed using SEM and the average diameter of the dispersed phase was determined by image analysis. The critical inter-particle distance for PBT/PC was determined.

Effects of Concentration and Temperature on Rheological Properties of Mixture of HPMC and CMC Solutions

2013 ◽  
Vol 787 ◽  
pp. 792-797
Author(s):  
Qing Yong Li ◽  
Jun Ye ◽  
Jian Xiong
Keyword(s):  
Rheological Properties ◽  
Arrhenius Equation ◽  
Loss Modulus ◽  
Flow Activation Energy ◽  
Shear Rates ◽  
Shear Thinning Fluids ◽  
Dynamic Rheological Properties ◽  
Flow Activation ◽  
Dominant Property ◽  
Power Law Equation

This work was designed to study the rheologicl properties of mixture of HPMC and CMC solutions because their rheologicl properties are very important in no matter food or pharmaceutical industry processing operations. Experiments were performed at different mixture ratios, shear rates and temperatures. The static and dynamic rheological properties tests were measured through the rheometer AR-550 and were investigated by using Power Law equation, Cross equation and Arrhenius equation. The results showed that the HPMC-CMC solutions behaved as typical Non-Newtonian shear-thinning fluids and had stronger non-Newtonian nature. With the concentration(CMC)increasing, consistency coefficient K, Zero Shearing Viscosity η0,viscous flow activation energy E, storage modulus G and loss modulus G all increased but decreased with the temperature increasing, except for Non-Newtonian index n. And viscosity was the dominant property in the mixture of HPMC-CMC solutions.

Research on the Rheological Properties of Domestic and International PPS Resin

2012 ◽  
Vol 535-537 ◽  
pp. 2517-2521
Author(s):  
Rui Ping Zhang ◽  
Peng Wei Xiang ◽  
Jin Ming Dai ◽  
Jian Ying Zhang ◽  
Mei Niu ◽  
...  
Keyword(s):  
Shear Rate ◽  
Viscous Flow ◽  
Apparent Viscosity ◽  
Viscosity Index ◽  
Capillary Rheometer ◽  
Flow Activation Energy ◽  
Japanese Sample ◽  
Flow Activation ◽  
Spinning Speed ◽  
Low Shear

Using the capillary rheometer to study the effect of shear rate, shear stress and temperature of Japanese and domestic PPS resin( fiber grade) on the apparent viscosity, index of non-Newtonian and viscous flow activation energy.The results show that with the increase of shear rate and temperature,compared to the domestic sample, Japanese sample has higher apparent viscosity, smaller non-Newtonian index(n),lower viscous flow activation energy,and smaller sensitivity to temperature.The Japanese specimens are suitable for processing and forming under high shear rate and spinning speed, but the domestic specimens are suitable for processing and froming under low shear rate and spinning speed.

scholarly journals Rheological Behavior and Its Chemical Interpretation of Crumb Rubber Modified Asphalt Containing Warm-Mix Additives

2018 ◽  
Vol 2672 (28) ◽  
pp. 337-348 ◽  
Author(s):  
Haopeng Wang ◽  
Xueyan Liu ◽  
Panos Apostolidis ◽  
Tom Scarpas
Keyword(s):  
Activation Energy ◽  
Molecular Weight ◽  
Rheological Properties ◽  
Phase Angle ◽  
Complex Modulus ◽  
Crumb Rubber ◽  
Asphalt Binders ◽  
Flow Activation Energy ◽  
Modified Asphalt ◽  
Flow Activation

The microstructure and chemical composition of asphalt binders have a significant effect on their rheological properties and, therefore, their performance as road paving binders. This study aims to investigate the effects of warm-mix asphalt (WMA) additives, organic type and chemical type, on the rheological properties and chemical internal structure of base asphalt and crumb rubber modified asphalt (CRMA). A set of dynamic shear rheometer (DSR) tests was conducted to obtain the rheological parameters (e.g., complex viscosity, complex modulus, phase angle) of asphalt binders. The flow activation energy was calculated from Arrhenius equation based on viscosity data to rank the thermal susceptibility. Black diagrams and master curves of complex modulus and phase angle were utilized to analyze the rheological properties. The molecular weight distributions of asphalt binders were inverted from the phase angle master curve to evaluate the molecular weight characteristics. It was found that the the addition of crumb rubber into base asphalt improves the rheological properties of enhanced modulus and elasticity. Organic and chemical types of WMA additives have different chemo-physical effects on both base asphalt and CRMA. Phase angle inversion method provides a powerful tool to monitor the molecular structure change and, therefore, the chemo-physical interactions of asphalt binders induced by modifications. Finally, there is a good correlation between flow activation energy and molecular weight.

Steady Rheological Properties and Microstructure of Polycarbonate/Highly Branched Polystyrene Blends

2011 ◽  
Vol 339 ◽  
pp. 204-209
Author(s):  
Ai Ying Li ◽  
Jie Yun Chang ◽  
Xiao Bing Zuo ◽  
Rong Xin Yuan
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Rheological Properties ◽  
Rheological Behavior ◽  
Melt Blending ◽  
Capillary Rheometer ◽  
Two Phase ◽  
Branched Polystyrene ◽  
Spherical Droplets ◽  
Plastic Fluids

Blends of polycarbonate (PC) and highly branched polystyrene (HBPS) were prepared by melt blending. The steady rheological behavior of them was determined using a capillary rheometer, furthermore, the effect of shear rate, temperature and the blend component on the viscosity of the blends was discussed. The results showed that all the blends exhibit the nature of the pseudo-plastic fluids, and the viscosity of them decreases dramatically with the increase of temperature and does slightly with the increase of shear rate. At a fixed shear stress, the viscosity of the blends is decreased with the increase of the HBPS content. Microstructure studies using SEM showed that all the blends are characteristic of a two-phase morphology, with spherical droplets of the minor HBPS phase dispersed in the continuous PC phase.

Research on Rheological and Thermal Properties of P(3HB-4HB)/PEG and the Preparation for Fiber

2010 ◽  
Vol 152-153 ◽  
pp. 1611-1615 ◽  
Author(s):  
Jing Guo ◽  
Nan Zheng ◽  
Sen Zhang
Keyword(s):  
Mechanical Property ◽  
Melt Spinning ◽  
Fiber Strength ◽  
Capillary Rheometer ◽  
Flow Activation Energy ◽  
Yarn Strength ◽  
Materials Research ◽  
Degree Of Orientation ◽  
Flow Activation ◽  
Thermal Stability Of

3-hydroxybutyrate-co-4-hydroxybutyrate [P(3HB-4HB)] is one of polyhydroxyalkanoates which is biodegradable and biocompatible, and is one of the hot issues of the biodegradable materials research. But the degradation will occur at high temperature and shear rate. So P(3HB-4HB) is modified with PEG10000 by means of a mechanical blending. In this research, capillary rheometer and TGA are applied to investigate its rheological and thermal behaviors. The technology of melt spinning is also studied and the P(3HB-4HB)/PEG10000 fiber with a certain mechanical property is obtained successfully. Electronic velocimeter and electronic single end yarn strength tester are applied to investigate the mechanical property of the fiber. The result of TG indicates that the addition of PEG10000 improves the thermal stability of P(3HB-4HB). The result of capillary rheometer shows that P(3HB-4HB)/PEG10000 is pseudoplasticfluid. Because of the addition of PEG10000, the non-Newtonian index n of the P(3HB-4HB)/PEG10000 sample increases and the flow activation energy of the P(3HB-4HB)/PEG10000 sample decreases. The result of fiber strength test shows that the addition of PEG10000 has an impact on the mechanical property of the fiber and the lowest fiber strength appeared when PEG10000 content was P(3HB-4HB)/PEG=100/6. The moisture regain ratio increases with the content of PEG10000 rising. And when PEG10000 content is P(3HB-4HB)/PEG=100/2, the highest degree of orientation of fiber appears.

Morphology and Crystallization Behavior of PTT Blends with PTW

2018 ◽  
Vol 777 ◽  
pp. 90-94
Author(s):  
Kun Yan Wang
Keyword(s):  
Crystallization Behavior ◽  
Average Particle Size ◽  
Average Particle ◽  
Microscopy Observation ◽  
Screw Extruder ◽  
Uniform Dispersion ◽  
Twin Screw ◽  
Nucleation Activity ◽  
Trimethylene Terephthalate ◽  
Poly Ethylene

Poly (trimethylene terephthalate) (PTT)/Poly (ethylene-butylacrylate-glyciyl methacrylate) (PTW) blends have been prepared in composition by weight 95/5, 90/10, 80/20 and 70/30 using the twin screw extruder approach. Their morphologies, crystallization behavior and mechanical properties were investigated. Scanning electron microscopy observation shows the uniform dispersion of PTW in PTT matrix with weight-average particle size from 0.98 to 3.64μm when the PTW content increases from 5wt% to 30wt% in the blends. The presence of the PTW increased the crystallinity of PTT matrix in PTT/PTW blends. A nucleation activity of the PTW appears in PTT/PTW blends.

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