Mechanical properties of epoxy resin/hydroxyl-terminated polyester blends: effect of two-phase structure

2005 ◽  
Vol 54 (10) ◽  
pp. 1408-1415 ◽  
Author(s):  
Yimin Liu ◽  
Weidong Zhang ◽  
Hongwei Zhou
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Phase Structure ◽  
Two Phase

A Novel Epoxy Resin Toughened by HTBN Liquid Rubber

1992 ◽  
Vol 274 ◽  
Author(s):  
Xiaozu Han ◽  
Zhankui Yun ◽  
Fenchun Guo
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Phase Structure ◽  
Curing Agent ◽  
Two Phase ◽  
Liquid Rubber ◽  
Sem And Tem ◽  
Amine Curing Agent ◽  
Rubber Phase ◽  
Amine Curing

ABSTRACTA novel toughened epoxy resin was obtained by using an epoxy-terminated prepolymer prepared from epoxy resin and hydroxy-terminated butadiene-acryl-onitrile copolymer (HTBN), and an amine curing agent. The cured, toughened resin has excellent mechanical properties due to the two-phase structure which was observed using SEM and TEM. When the HTBN content is 15 phr, the rubber phase separates effectively and the specimen presents a fine two-phase structure. However, when the HTBN content reaches 25 phr, the morphology appears continuous.

Influence of Al-Content on the Microstructure and Mechanical Properties in ZrAlN Coatings

2014 ◽  
Vol 1004-1005 ◽  
pp. 778-783 ◽  
Author(s):  
Xiao Ying Zhu ◽  
Jun Du ◽  
Gui Min Liu ◽  
Xiao Hui Zheng
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Phase Structure ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Two Phase ◽  
Al Content ◽  
Microstructure And Mechanical Properties ◽  
Transmission Electron ◽  
Indentation Methods

Zirconium aluminum nitride coatings have been deposited onto Ti-6Al-4V substrates by reactive magnetron sputtering in order to investigate the influence of Al-content on the microstructure and mechanical properties. The morphology and microstructure of the coatings were investigated by field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). Nanoindentation and Vicker’s indentation methods were employed to measure the hardness and toughness of the coatings, respectively. The results show that a structure of single cubic phase with twinning is formed at Al content of x ≤ 0.23, and a two-phase structure of hexagonal and cubic phase is formed at Al content of x ≥ 0.47. Hardness and toughness of the Zr1-xAlxN coatings show similar tendency with the increasing of Al-content. Both of them reach the maximum values at x=0.23 and drop to the minimum values at x=0.47, after that, they slightly increase with the increasing Al-content. The enhanced hardness and toughness achieved at x=0.23 is ascribed not only to single cubic phase structure but also to twinning structure.

Study on Mechanical Properties of EPDM/HPVC Prepared by Dynamic Vulcanization

2011 ◽  
Vol 299-300 ◽  
pp. 751-754 ◽  
Author(s):  
Bing Liang ◽  
Jie Mei Ji ◽  
Xiao Dong Hong
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Phase Structure ◽  
Thermoplastic Elastomer ◽  
Continuous Phase ◽  
Mass Ratio ◽  
Dynamic Vulcanization ◽  
Two Phase ◽  
Excellent Mechanical Property ◽  
Aging Resistance

A thermoplastic elastomer of EPDM/HPVC with excellent properties was prepared by dynamic vulcanization. The effects of the rubber/plastics ratio, the content of plasticizer and vulcanizing agent on the mechanical properties of EPDM/HPVC were investigated in detail. Results indicate when the mass ratio of EPDM/HPVC was 30/70, CPE was 9 phr, sulfur was 0.4 phr, EPDM/HPVC had an excellent mechanical property and aging resistance. EPDM/HPVC prepared by dynamic vulcanization had a typical sea-island two phase structure in which smaller EPDM particle dispersed uniformly in the continuous phase of HPVC.

scholarly journals Biocomposites Developed with Litchi Peel Based on Epoxy Resin: Mechanical Properties and Flame Retardant

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Tuan Anh Nguyen
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Low Cost ◽  
Natural Fibers ◽  
Phase Interface ◽  
Polymeric Materials ◽  
Two Phase ◽  
Sem Images ◽  
Limiting Oxygen Index ◽  
New Type

Bio-based composites are reinforced polymeric materials, which include one or two bio-based components. Biocomposites have recently attracted great attention for applications ranging from home appliances to the automotive industry. The outstanding advantages are low cost, biodegradability, lightness, availability, and solving environmental problems. In recent days, biodegradable natural fibers are attracting a great deal of interest from researchers to work on and develop a new type of composite material for diverse applications. The objective of this work is to evaluate fire resistance and mechanical properties of epoxy polymer composites reinforced with lychee peel (Vietnam), at 10 wt%, 20 wt%, and 30 wt% mass%. The study showed that the mechanical properties and flame retardancy tended to increase in the presence of lychee peel reinforcement. In the combined ratios, 20 wt% lychee rind gave a limiting oxygen index of 21.5%, with a burning rate of 23.45 mm/min. In terms of mechanical strength, in which the Izod impact strength increased by 26.46%, the compressive strength increased by 25.20% and the tensile strength increased by 20.62%. The microscopic images (SEM images) show that the particle distribution is quite good and the adhesion and wetting compatibility on the two-phase interface of lychee peel-epoxy resin are strong.

scholarly journals The development of platinum-based alloys and their thermodynamic database

2002 ◽  
Vol 38 (3-4) ◽  
pp. 197-204 ◽  
Author(s):  
L.A. Cornish ◽  
J. Hohls ◽  
P.J. Hill ◽  
S. Prins ◽  
R. Süss ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Structure ◽  
Base Composition ◽  
Alloy Composition ◽  
Quaternary Alloy ◽  
Thermodynamic Database ◽  
Ternary Alloys ◽  
Quaternary Alloys ◽  
Two Phase ◽  
Oxidation Properties

A series of quaternary platinum-based alloys have been demonstrated to exhibit the same two-phase structure as Ni-based superalloys and showed good mechanical properties. The properties of ternary alloys were a good indication that the quaternary alloys, with their better microstructure, will be even better. The quaternary alloy composition has been optimised at Pt84:Al11:Ru2:Cr3 for the best microstructure and hardness. Work has begun on establishing a thermodynamic database for Pt-Al-Ru-Cr alloys, and further work will be done to enhance the mechanical and oxidation properties of the alloys by adding small amounts of other elements to the base composition of Pt84:Al11:Ru2:Cr3.

Study on Toughening of the Epoxy

2012 ◽  
Vol 624 ◽  
pp. 260-263
Author(s):  
Chun Fa Ouyang ◽  
Duo You Zhang ◽  
Qun Gao ◽  
Yu Tao Shi ◽  
Kang Sheng Zheng
Keyword(s):  
Shear Strength ◽  
Epoxy Resin ◽  
Phase Structure ◽  
Single Phase ◽  
Resin Composites ◽  
Toughening Mechanism ◽  
Two Phase ◽  
Breaking Elongation ◽  
Epoxy Resin Composites ◽  
The Impact

Abstract. The effect of styrene-The effect of hydroxy-terminated polybutadiene liquid rubber (HTPB) and softened agent on the performance of epoxy resin are studied. The mechanical properties of the composites investigated and the toughening mechanism were studied trough the SEM. In the HTPB/epoxy resin composites, the hardness is reduced but the elongation and the shear strength increased . Added 20wt%HTPB, the breaking elongation can be up to 16.19% and the shear strength rise to 13.74MPa. From the images of the SEM, the globular and trumpet-like hole and shear zone can hinder the development of the cracks, thus increasing the toughness of the epoxy resint. In the softened agent/epoxy resin composites, The addition of the softened agent, the breaking elongation and the impact strength have increased. From the images of SEM,we found that ,with the addition of the softened agent ,the single phase structure turns to two-phase structure and the bicontinuous phase and the brittle fracture turns to ductile fracture.

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