scholarly journals Cyanate ester resin based composites with high toughness and thermal conductivity

RSC Advances ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 5722-5730 ◽  
Author(s):  
Le Zhai ◽  
Zhenxin Liu ◽  
Chen Li ◽  
Xiongwei Qu ◽  
Qingxin Zhang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Impact Strength ◽  
Cyanate Ester ◽  
Core Shell ◽  
Microelectronic Packaging ◽  
Cyanate Ester Resin ◽  
High Toughness ◽  
The Impact

h-BN particles were used to fabricate cyanate ester/core–shell structured polyacrylic/BN composites. The impact strength and the thermal conductivity of the composites were simultaneously increased, which may be used in microelectronic packaging.

Significantly improving mechanical, thermal and dielectric properties of cyanate ester resin through building a new crosslinked network with unique polysiloxane@polyimide core–shell microsphere

RSC Advances ◽  
2016 ◽  
Vol 6 (47) ◽  
pp. 40962-40969 ◽  
Author(s):  
Xinyi Dong ◽  
Zhijuan Zhang ◽  
Li Yuan ◽  
Guozheng Liang ◽  
Aijuan Gu
Keyword(s):  
Dielectric Properties ◽  
Cyanate Ester ◽  
Core Shell ◽  
Cyanate Ester Resin

Tough, rigid and thermally resistant resins with outstanding dielectric properties were developed based on polysiloxane@polyimide core–shell microspheres and cyanate ester.

On Mechanical and Thermal Properties of Epoxy/Graphene Nanocomposites

2018 ◽  
Vol 22 ◽  
pp. 23-33 ◽  
Author(s):  
Seenaa I. Hussein
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Impact Strength ◽  
Mechanical And Thermal Properties ◽  
Graphene Nanocomposites ◽  
Graphene Composite ◽  
Efficiency Increase ◽  
Graphene Content ◽  
The Impact ◽  
Thermal Stability Of

In this research, we have prepared epoxy/graphene nanocomposites (graphene content: 1, 3, 5, 7, and 9 wt%) to investigate some mechanical (impact strength, hardness, and Brazilian tests) and thermal properties (thermal conductivity and thermogravimetric analysis). Our results show that the impact strength, hardness, and compression strength values increased to 5.04 kJ/m2, 79.8, and 27.85 MPa, respectively, as increasing graphene content up to 5 wt% and then decreased for further increasing of the graphene content. The observed reduction in the hardness could be attributed to the samples brittleness. On the other hand, the thermal conductivity increased with increasing the graphene content because of the high thermal conductivity of graphene and thus the efficiency increase with increasing of graphene content. In addition, the thermal stability of epoxy/graphene composite increase compared with pure epoxy resin, while the activation energy for samples consists of 9 wt% graphene greater than those containing 1 wt% graphene.

Study on Mechanical Property of Polylactic Acid Toughened by Polyacrylate Microsphere

2013 ◽  
Vol 781-784 ◽  
pp. 390-394
Author(s):  
Xiao Li Song ◽  
Ying Chen ◽  
Yu Zhi Xu ◽  
Chun Peng Wang
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Polylactic Acid ◽  
Strength Loss ◽  
Core Shell ◽  
Mass Ratio ◽  
Elongation At Break ◽  
Emulsion Copolymerization ◽  
The Impact ◽  
Toughening Agent

Polyacrylate microsphere with different core/shell ratio (mass ratio) were prepared by semi-continuous seed emulsion copolymerization using butyl acrylate (BA) and methyl methacrylate (MMA) as main monomers，which were used to toughen polylactic acid (PLA) after drying. The effect of core/shell ratio of polyacrylate toughening agent (ACR) on mechanical properties of PLA was studied. The results showed that when adding 8wt%ACR, the impact strength and elongation at break of PLA were both first increased and then decreased as increasing of core/shell ratio, while the tensile strength loss of PLA was little changed. It is found that the impact strength was increased about 24% than that of neat PLA as well as the elongation at break was increased from 2% to 12% when the ratio was 7/3, which was the best ratio.

Preparation of TiO2-g-Polystyrene Nanosphere and its Application in Toughening PS Matrix

2010 ◽  
Vol 97-101 ◽  
pp. 1677-1680 ◽  
Author(s):  
Xiao Ming Sang ◽  
Peng Wu ◽  
Gui Xiang Hou ◽  
Shou Wu Yu
Keyword(s):  
Impact Strength ◽  
Core Shell ◽  
Gravimetric Analysis ◽  
Nano Tio2 ◽  
Shell Nanoparticles ◽  
Maximum Value ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
Core Shell Nanoparticles ◽  
The Impact

TiO2-g-Polystyrene(PS) nano-microspheres were prepared by grafted styrene monomer on the surface of nano-TiO2 particles via emulsion polymerization, and its surface and morphology were studied by Transmission electron microscopes(TEM), Fourier transform infrared spectroscopy(FTIR) and thermal gravimetric analysis(TGA). The results showed that the TiO2-g-PS nano-microsphere had a structure of sphericity composed of TiO2 and PS as core and shell respectively. The core-shell nanoparticles were subsequently used as filler in a PS matrix, and the impact strength of the TiO2-g-PS/PS composites were studied. The results showed that the impact strength of the composite material could be improved obviously, the maximum value of impacted strength of the TiO2-g-PS/PS was 1.75kJ/m2, which was 180% higher than that of pure PS. Drawing from the results, it could be confirmed that these core-shell TiO2-g-PS nanosphere fillers could toughen the PS matrix.

Modification of Cyanate Ester Resin by Epoxy-Functionalized Polyhedral Oligomeric Silsesquioxane

2012 ◽  
Vol 549 ◽  
pp. 314-317 ◽  
Author(s):  
Zeng Ping Zhang ◽  
Jian Zhong Pei ◽  
Chang Qing Fang ◽  
Shuan Fa Chen
Keyword(s):  
Impact Strength ◽  
Flexural Strength ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Cyanate Ester ◽  
Cyanate Ester Resin ◽  
Oligomeric Silsesquioxane ◽  
Different Content

A series of cyanate ester resin (CE) based organic-inorganic hybrids containing different content (0, 5, 10, 15 and 20 wt%) of epoxy functionalized polyhedral oligomeric silsesquioxane (POSS-Ep) were prepared by casting and curing. Impact and flexural strengths of the hybrids were investigated. Results showed that CE10 containing 10wt% of POSS-Ep displayed not only the optimum impact strength but the optimum flexural strength.

scholarly journals Reduced density spheroplastic based on hollow phenol-formaldehyde microspheres and epoxy resin

2019 ◽  
Vol 58 (4) ◽  
pp. 98-101
Author(s):  
Vladimir Yu. Chukhlanov ◽  
◽  
Kirill V. Smirnov ◽  
Natalia V. Chukhlanova ◽  
◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Phenol Formaldehyde ◽  
Charpy Impact ◽  
Epoxy Oligomer ◽  
Hollow Microspheres ◽  
Stationary Mode ◽  
Gel Formation ◽  
The Impact

In this article the physical-mechanical, thermal and electrical properties of spheroplastic based on epoxy resin ED-20 and hollow phenol-formaldehyde microspheres were studied. The samples were obtained by mixing an epoxy resin, cured with polyethylene polyamine, with hollow phenol-formaldehyde microspheres, poured into a mold and then cured at room temperature. The influence of the filler on the kinetics of the interaction of epoxy oligomer and aliphatic polyamine was studied. The effect of reducing the time of gel formation may occur due to the possible presence of reactive groups on the surface of microspheres. The experiments showed that the introduction of hollow phenol-formaldehyde microspheres in General leads to a slight decrease in the gel formation time. It is established that the introduction of hollow microspheres into the composition leads to a decrease in the density of the finished composition. The impact strength of spheroplastic was determined in accordance with GOST 4647-2015 "Method of Charpy impact strength determination" (ISO 179-1: 2010, NEQ). The introduction of hollow microspheres into the composition leads to a change in the impact strength of the composition in the direction of its decrease. A similar trend is observed in the study of the strength in the separation from the substrate of different materials. The coefficient of thermal conductivity was determined in a stationary mode on the device ITP-MG4"100" GOST 7076-99 "Method for determining the thermal conductivity and thermal resistance in a stationary thermal regime." Studies have shown that an increase in the content of hollow microspheres in the composition to 15% leads to a gradual decrease in the thermal conductivity coefficient to 0.74 W/m∙K. The studied materials can be used as thermal insulation materials and for the manufacture of products used in various fields of science and technology.

scholarly journals TiO2-Nanofillers Effects on Some Properties of Highly- Impact Resin Using Different Processing Techniques

2018 ◽  
Vol 12 (1) ◽  
pp. 202-212 ◽  
Author(s):  
Hawraa Khalid Aziz
Keyword(s):  
Thermal Conductivity ◽  
Impact Strength ◽  
Color Stability ◽  
Acrylic Resin ◽  
Water Bath ◽  
Control Group ◽  
Significance Level ◽  
Significant Difference ◽  
And Control ◽  
The Impact

Background: The criteria of conventional curing of polymethyl methacrylate do not match the standard properties of the denture base materials. Objectives: This research was conducted to investigate the addition of TiO2 nano practical on impact strength, thermal conductivity and color stability of acrylic resin cured by microwave in comparison to the conventional cured of heat-polymerized acrylic resin. Materials and Methods: 120 specimens made of high impact acrylic resin were divided into two main groups according to the type of curing (water bath, microwave), then each group was subdivided into two groups according to the addition of 3% TiO2 nano-fillers and control group (without the addition of TiO2 0%). Each group was subdivided according to the type of test into 3 groups with 10 specimens for each group. Data were statistically analyzed using Student t-test to detect the significant differences between tested and control groups at significance level (P<0.05). Results: According to curing type methods, the results showed that there was a significant decrease in impact strength of microwaved cured resin, but there was no significant difference in the thermal conductivity and color stability of resin. In addition, by using nanofiller, there was a significant increase in the impact strength and color stability with the addition of 3% TiO2 nanofillers, but no significant difference was found in the thermal conductivity of the acrylic resin. Conclusion: The microwave curing of acrylic resin had no change in the color stability and thermal conductivity in comparison to the water bath, but the impact strength was decreased. The addition of 3% TiO2 improved the impact and the color stability, but the thermal conductivity did not change.

Cyanate ester resin based composites with high toughness and low outgassing performances

2021 ◽  
Vol 23 ◽  
pp. 100574
Author(s):  
Shumao Li ◽  
Yanfang Zhu ◽  
Yan Wang ◽  
Baorui Wang ◽  
Yudong Huang ◽  
...  
Keyword(s):  
Cyanate Ester ◽  
Cyanate Ester Resin ◽  
High Toughness

Influence of Natural Rubber/Poly (3-Trimethoxysilyl Propyl Methacrylate) Core-Shell Compatibilizer on Dynamic, Mechanical and Morphological Properties of PMMA/ENR Blends

2013 ◽  
Vol 747 ◽  
pp. 538-541 ◽  
Author(s):  
Suparat Nooma ◽  
Rathanawan Magaraphan
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Natural Rubber ◽  
Testing Machine ◽  
Morphological Properties ◽  
Core Shell ◽  
Melt Mixing ◽  
Propyl Methacrylate ◽  
Dynamic Mechanical ◽  
The Impact

In this work, epoxidized natural rubber (ENR) is used to improve the impact strength of poly (methyl methacrylate) (PMMA). The natural rubber with poly (3-trimethoxysilyl propyl methacrylate) core-shell (adNR), prepared by admicellar polymerization, is used as the compatibilizer for PMMA/ENR blends which were prepared through melt mixing in a twin screw extruder. The effects of ENR and adNR contents on impact property were investigated by pendulum impact tester. The impact strength increased with ENR and adNR contents. The morphology on the fracture surfaces were demonstrated by using field emission electron microscope (FE-SEM), which showed the compatibility between ENR, adNR and PMMA. Furthermore, the effects of ENR and adNR contents on dynamic and mechanical properties were examined by dynamic mechanical analyzer and universal testing machine, respectively. The results illustrated that the incorporation of the adNR affected the dynamic and mechanical properties of the blends.

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