Polystyrene/Plasma Treated Clay Nanocomposite

2007 ◽  
Vol 121-123 ◽  
pp. 1493-1496 ◽  
Author(s):  
Patchara Tasanatanachai ◽  
Rathanawan Magaraphan
Keyword(s):  
Impact Strength ◽  
Optimum Condition ◽  
Interfacial Adhesion ◽  
Characteristic Peak ◽  
Weak Point ◽  
Plasma Technique ◽  
Clay Surface ◽  
Polystyrene Matrix ◽  
Ft Ir ◽  
The Impact

One of weak point of PS/clay nanocomposite is the lack of interfacial adhesion between clay and polystyrene matrix. In this research, the radical sites on the clay surface were induced via the plasma technique. The optimum condition for this process was investigated and used to treat bentonite before grafting styrene on clay structure. The increase of basel-spacing of clay was not noticeable from XRD spectra, but the FT-IR spectra showed characteristic peak of polystyrene implied that the styrene grafting was occurred on the outer surface of the clay. The impact strength is quite improved, especially for the higher ratio of styrene/clay during the grafting step.

scholarly journals Impact Toughness and Ductility Enhancement of Biodegradable Poly(lactic acid)/Poly(ε-caprolactone) Blends via Addition of Glycidyl Methacrylate

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Wei Kit Chee ◽  
Nor Azowa Ibrahim ◽  
Norhazlin Zainuddin ◽  
Mohd Faizal Abd Rahman ◽  
Buong Woei Chieng
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Glycidyl Methacrylate ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Sem Analysis ◽  
Poly Lactic Acid ◽  
Biodegradable Poly ◽  
Interfacial Compatibility ◽  
The Impact

Poly(lactic acid) (PLA)/poly(ε-caprolactone) (PCL) blends were prepared via melt blending technique. Glycidyl methacrylate (GMA) was added as reactive compatibilizer to improve the interfacial adhesion between immiscible phases of PLA and PCL matrices. Tensile test revealed that optimum in elongation at break of approximately 327% achieved when GMA loading was up to 3wt%. Slight drop in tensile strength and tensile modulus at optimum ratio suggested that the blends were tuned to be deformable. Flexural studies showed slight drop in flexural strength and modulus when GMA wt% increases as a result of improved flexibility by finer dispersion of PCL in PLA matrix. Besides, incorporation of GMA in the blends remarkably improved the impact strength. Highest impact strength was achieved (160% compared to pure PLA/PCL blend) when GMA loading was up to 3 wt%. SEM analysis revealed improved interfacial adhesion between PLA/PCL blends in the presence of GMA. Finer dispersion and smooth surface of the specimens were noted as GMA loading increases, indicating that addition of GMA eventually improved the interfacial compatibility of the nonmiscible blend.

Hyper-Dispersant Modifier Prepared and Applied in Polyethylene Composites

2013 ◽  
Vol 750-752 ◽  
pp. 2026-2030
Author(s):  
Shao Hui Wang
Keyword(s):  
Infrared Spectroscopy ◽  
Electron Microscope ◽  
Impact Strength ◽  
Scanning Electron Microscope ◽  
Surface Analysis ◽  
Butyl Acrylate ◽  
Ft Ir ◽  
Anchoring Group ◽  
The Impact ◽  
Scanning Electron

A new hyper-dispersant with Silicon radicals as anchoring group and poly (butyl acrylate) as solvatable chain was synthesized and its effect on the properties of PE/Talc composites was investigated in this paper. Fourier transmission infrared spectroscopy (FT-IR) results show that the modifier react on the Talc powders surface and the modified Talc powders particles. The impact strength of PE/Talc composites increased about 32.5% compared with that of PE/Talc (filled with same non-modified fraction) respectively. Based on surface analysis by scanning electron microscope (SEM), the Talc powders particles buried well in PE matrix when Talc powders was coated with the new modifier.

Morphology and Mechanical Properties of Polyoxymethylene and Acrylonitrile-Butadiene-Styrene Blends with Compatibilizer

2015 ◽  
Vol 659 ◽  
pp. 463-467
Author(s):  
Sirirat Wacharawichanant ◽  
Parida Amorncharoen ◽  
Ratiwan Wannasirichoke
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Maleic Anhydride ◽  
Impact Strength ◽  
Interfacial Adhesion ◽  
Acrylonitrile Butadiene Styrene ◽  
Two Phase ◽  
The Impact ◽  
Morphology And Mechanical Properties ◽  
Butadiene Styrene

The effects of polypropylene-graft-maleic anhydride (PP-g-MA) compatibilizers on the morphology and mechanical properties of polyoxymethylene (POM)/acrylonitrile-butadiene-styrene (ABS) blends were investigated. Two types of compatibilizers, PP-g-MA with maleic anhydride 0.50 wt% (PP-g-MA1) and PP-g-MA with maleic anhydride 1.31 wt% (PP-g-MA2) were used to study the interfacial adhesion of POM and ABS. POM/ABS blends with and without PP-g-MA compatibilizer were prepared by an internal mixer and molded by compression molding. Scanning electron microscope (SEM) was used to investigate the morphology of ABS phase in POM matrix. The results found that POM/ABS blends clearly demonstrated a two phase separation of dispersed ABS phase and the POM matrix phase, and ABS phase dispersed as spherical domains in POM matrix in a range of ABS 10-30 wt% and the blends containing ABS more than 30 wt% showed the elongated structure of ABS phase. The addition of PP-g-MA could improve the interfacial adhesion of POM/ABS blends due to the domain size of ABS phase decreased after adding PP-g-MA. The mechanical properties showed that the impact strength of POM/ABS blends decreased in a range of 10-20 wt% and did not change after 20 wt%. The addition of PP-g-MA did not change the impact strength of POM/ABS blends. The Young’s modulus of POM/ABS blends increased up to 30 wt% of ABS and then decreased. While the blends showed the decrease of tensile strength and percent strain at break with increasing ABS content. The addition of PP-g-MA increased the tensile strength of POM/ABS blends in a range of 30-40 wt% of ABS. The above results indicated that the morphology had an effect on the mechanical properties of polymer blends.

Study on Preparation and Properties of Polystyrene/Styrene-Ethylene/Butylene-Styrene Composites

2011 ◽  
Vol 284-286 ◽  
pp. 1886-1889 ◽  
Author(s):  
Xiao Ming Sang ◽  
Lei Zhang ◽  
Run Zeng Wang ◽  
Xing Gang Chen ◽  
Man An ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Impact Strength ◽  
Melt Blending ◽  
Maximum Torque ◽  
Polystyrene Matrix ◽  
Blending Process ◽  
The Impact ◽  
Scanning Electron

The polystyrene/styrene-ethylene/butylene-styrene composites were prepared by melt blending process in this paper. The mechanical properties of PS/SEBS composites were analyzed. The results showed that the impact strength of PS/SEBS composites could be increased with the content increasing of SEBS, meanwhile the tensile strength was lower than pure polystyrene. When the content of SEBS increased to 13 wt.%, the impact strength of PS/SEBS composites was 2.4 times higher than that of pure PS. The fractured surfaces of the specimens were characterized by scanning electron microscopy(SEM). The results showed that the impact fractured surfaces produced a lot of sliding along with the addition of SEBS. The particles of SEBS could be well dispersed in polystyrene matrix. From rheological properties studies and the values of the torque, it was suggested that the maximum torque of PS/SEBS composites decreased drastically.

Research into the Preparation and Performance of PP-G-DL411 Compatibilizer and PP-G-DL411/GF/ PP Composites

2013 ◽  
Vol 303-306 ◽  
pp. 2636-2639
Author(s):  
Bo Fen Huang ◽  
Jun Jie Wang ◽  
Han Xuan Liang
Keyword(s):  
Impact Strength ◽  
Interfacial Adhesion ◽  
Experimental Results ◽  
Comprehensive Properties ◽  
Pp Composites ◽  
And Performance ◽  
The Impact

Aluminum ester grafted polypropylene copolymer (PP-g-DL411) compatibilizer and PP-g-DL411/GF/PP composites are prepared by melting cross blend. FTIR results show that DL411 grafts on PP molecular chains and leads to a new PP-g-DL411 copolymer. SEM reveals that PP-g-DL411 can effectively improve the interface compatibility and enhance the interfacial adhesion between GF and PP. Experimental results indicate that the best comprehensive properties of PP-g-DL411/GF/ PP composites are achieved when the percentage of PP-g-DL411 is 8% and that of GF is between 40% and 45%. In particular the impact strength is increased by 222% compared with uncompatibilized GF/PP.

Effect of Silane Functionalization on the Properties of Iron Oxide Nanoparticles/UP Toughened Epoxy Nanocomposites

2013 ◽  
Vol 651 ◽  
pp. 154-158 ◽  
Author(s):  
S. Julyes Jaisingh ◽  
V. Selvam ◽  
M. Suresh Chandra Kumar ◽  
K. Thyagarajan
Keyword(s):  
Iron Oxide ◽  
Impact Strength ◽  
Iron Oxide Nanoparticles ◽  
Unsaturated Polyester ◽  
Oxide Nanoparticles ◽  
Epoxy Nanocomposites ◽  
Toughened Epoxy ◽  
Ft Ir ◽  
The Impact ◽  
Work Up

Effect of iron oxide nanoparticles (Fe2O3) and siliconized iron oxide nanoparticles (Si- Fe2O3) on the properties of Unsaturated Polyester (UP) toughened epoxy nanocomposites is investigated in this work. UP toughened based epoxy nanocomposites reinforced with silane functionalized Fe2O3and unmodified Fe2O3nanoparticles were prepared. The silane group functionalization on Fe2O3nanoparticles was confirmed by FT-IR spectroscopy. The impact strength and hardness were studied as per ASTM. The impact strength of the epoxy matrix increased by the reinforcement of Si-Fe2O3nanoparticles which reveals the formation of nanocomposites. Morphology of Si-Fe2O3nanoparticles reinforced UP toughened epoxy nanocomposites was investigated by Scanning Electron Microscope.

The effect of interfacial adhesion on the impact strength of immiscible PP/PETG blends compatibilized with triblock copolymers

Polymer ◽  
2009 ◽  
Vol 50 (19) ◽  
pp. 4737-4744 ◽  
Author(s):  
Xinlan Zhang ◽  
Bo Li ◽  
Ke Wang ◽  
Qin Zhang ◽  
Qiang Fu
Keyword(s):  
Impact Strength ◽  
Interfacial Adhesion ◽  
Triblock Copolymers ◽  
The Impact

Study on the Mechanical Properties of PP/EPDM/Mesoporous MCM-41 Composites

2011 ◽  
Vol 189-193 ◽  
pp. 853-857
Author(s):  
Na Wang ◽  
Xiang Zhou Wang ◽  
Qing Hong Fang ◽  
Er Fan Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Interfacial Adhesion ◽  
Morphological Evidence ◽  
Dispersion Phase ◽  
The Impact ◽  
Ethylene Propylene Diene Terpolymer ◽  
Template Particle ◽  
Mcm 41

Nano-sized as-synthesized MCM-41 (with template) particle, whose pore channels and outer surface are full of organic CTAB template, is used as compatibilizers for immiscible polypropylene (PP)/ethylene–propylene–diene terpolymer (EPDM) blends. The mechanical properties of PP/EPDM/mesoporous MCM-41 ternary composites are investigated. The nano-structured MCM-41 (without template) material constituted by an ordered network of hexagonal channels is selected to compare with as-synthesized MCM-41 (with template) in mechanical properties of PP/EPDM blend. The results shows that tensile strength of the blend is increased by 13.6% and the impact strength is increased by 71.6% by addition 2 wt% content of as-synthesized MCM-41 (with template) compared to pure PP/EPDM. The presence of MCM-41(without template) in the blend cannot improve the mechanical properties obviously. SEM reveals that the enhancement of the interface is obtained by adding MCM-41 (with template). SEM also indicates that incorporation of as-synthesized MCM-41 (with template) into PP/EPDM blend can act as compatibilizer, which results in a decreased particle size of dispersion phase together with morphological evidence of interfacial adhesion. However, with the presence of MCM-41 (without template), the interface do not show clearly change compared with the PP/EPDM blend. The PP/EPDM/MCM-41 (with template) composites show higher tensile strength and impact strength than the PP /EPDM / MCM-41 (without template).

scholarly journals Acrylonitrile-Styrene-Acrylate Particles with Different Microstructure for Improving the Toughness of Poly(styrene-co-acrylonitrile) Resin

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Yuanying Zhang ◽  
Xuechun Zhang ◽  
Yongbin Cao ◽  
Jiachun Feng ◽  
Wuli Yang
Keyword(s):  
Impact Strength ◽  
Interfacial Adhesion ◽  
Core Shell ◽  
Toughening Mechanism ◽  
Acrylate Copolymer ◽  
Matrix Deformation ◽  
Shell Composition ◽  
Core Shell Structure ◽  
Cross Linker ◽  
The Impact

Herein, acrylonitrile-styrene-acrylate copolymer (ASA) particles with different microstructure were synthesized by emulsion polymerization and then used for toughening poly(styrene-co-acrylonitrile) (SAN) resin. The structure of ASA particles was confirmed by FTIR. TEM results demonstrated that the particles with different morphologies of multilobe shape, complete core-shell and dumbbell shape were obtained depending on the cross-linker amount. It was found that the toughening efficiency reached the highest when the ASA particles had complete core-shell structure and the shell composition was close to that of the SAN matrix. It was ascribed to the fact that the complete shell layer and similar shell composition provided sufficient interfacial adhesion and transferred stress to induce larger matrix deformation, so that the notched impact strength increased accordingly. Moreover, the notched impact strength of SAN/ASA blend was improved without significantly sacrificing tensile strength when adding 30 wt% ASA particles with the size of around 400 nm. SEM results of the impact-fractured surfaces revealed that irregular fluctuation and numerous microvoids occurred. It was deduced that the toughening mechanism was attributed to the crazings and cavitation of particles. Therefore, this study paved a way of toughening the resin by adjusting the microstructure of the particles including morphology, composition, and size.

Расчетные методы оценки ударной вязкости сварных элементов с трещинами

2020 ◽  
Vol 44 (3) ◽  
pp. 22-36
Author(s):  
Keyword(s):  
Stress Intensity ◽  
Impact Strength ◽  
Welded Joints ◽  
Development Process ◽  
Welded Joint ◽  
Operating Temperature ◽  
Crack Development ◽  
Heterogeneous Structure ◽  
Critical Crack Length ◽  
The Impact

Практика показывает, что для сварных конструкций, эксплуатируемых в условиях Крайнего Севера необходимо уделять внимание работоспособности сварных соединений при низких температурах. Металл сварных соединений в процессе воздействия обработки изменяет свои свойства, снижается ударная вязкость, образуется гетерогенная структура с большой степенью разнозернистости. Чтобы оценивать и иметь возможность правильно контролировать термическое воздействие и последствия сварочного процесса, требуется решить задачу аналитического определения ударной вязкости для всех зон сварного соединения. В настоящей статье представлен инженерный метод оценки ударной вязкости, применимый для любой зоны сварного соединения, в которой имеется острый или особый концентратор напряжений – трещина. Разработанный аналитический метод расчета ударной вязкости отражает качественную и количественную картину взаимосвязи структурно-механических характеристик и работы развития трещины в диапазоне температур 77…300 К. Предложенная схематизация зависимости критического коэффициента интенсивности напряжений от температуры позволила найти коэффициенты, характеризующие свойства материала, и выполнить расчеты изменения предела текучести и предела прочности от температуры эксплуатации. Построены графики зависимости работы развития трещины от температуры эксплуатации для сталей 15ГС и 17ГС, сравнение которых с экспериментальными данными показывает удовлетворительное согласование. Найдено, что при напряжениях предела выносливости отношение работы развития трещины к критической длине трещины постоянно, не зависит от температуры и для сталей 15ГС и 17ГС равно около 10. Ключевые слова: ударная вязкость, работа разрушения, коэффициент интенсивности напряжений, трещина, феррито-перлитная сталь, зона термического влияния. For welded structures under operation in the Far North, attention must be paid to the performance of welded joints at low temperatures. The properties of metal of welded joints are changed in the process of treatment, its toughness decreases, and a heterogeneous structure with a large range of different grain sizes is formed. In order to evaluate and be able to correctly control the thermal effect and the consequences of the welding process, it is necessary to solve the problem of analytical determination of impact strength for all zones of the welded joint. The paper presents an engineering method for evaluation of the impact strength applicable to any area of the welded joint in which there is a sharp or super sharp stress concentrator – a crack. The developed analytical method for calculating the impact strength reflects a qualitative and quantitative codependency of structural and mechanical characteristics and the process of crack development in the temperature range of 77–300 K. The proposed schematization of dependence of the critical coefficient of stress intensity on the temperature made it possible to find coefficients characterizing the properties of the material and to perform calculations of changes in yield strength and tensile strength on operating temperature. Graphs of the crack development process dependency on the operating temperature for 15ГС and 17ГС steels were constructed, and their comparison with experimental data displays satisfactory agreement. It was found that at endurance limit stresses, the ratio of the crack development process to the critical crack length is constant, non-dependent on temperature, and is equal to 10 for 15ГС and 17ГС steels. Keywords: impact strength, fracture work, stress intensity factor, crack, ferrite-pearlite steel, heat affected zone, steel tempering.

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