Synthesis of core-shell particles based on hyperbranced polyester and zirconium slag nanoparticles and its influence on the impact resistance of epoxy resin thermosets

In order to modify the properties of the epoxy composites, an alkali catalyzed biphenyldiol formaldehyde resin (BPFR) was synthesized and used to cure epoxy resin (ER). γ-Glycidoxypropyl trimethoxysilane (KH-560) was used as a reinforcer of the composites. Laminates of the BPFR/ER fiberglass reinforced composites with different (KH-560) contents were prepared. The influence of the KH-560 content on the glass transition temperature (Tg) and thermal degradation properties of the composites was researched by dynamic mechanical analyzer (DMA) and thermogravimetric analysis (TG). The mechanical, electrical properties of the composites were determined. The results showed that the interfacial bonding strength between resin matrix and fiberglass can be efficiently improved with the presence of KH-560. When the ratio of BPFR and ER is 3 : 7, the content of KH-560 is 5 ~7 wt%, the impact resistance of the fiberglass reinforced composites is 61.35~78.59 kJ/m2, the tensile resistance is 150.37~162.54 MPa, which are all 30 % higher than that of no added; The dielectric constant ε and dielectric loss tanδ of the composites is between 0.50~0.68 and between 0.008~0.01, respectively.

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Resistance to Cleavage of Core–Shell Rubber/Epoxy Composite Foam Adhesive under Impact Wedge–Peel Condition for Automobile Structural Adhesive

Polymers ◽

10.3390/polym11010152 ◽

2019 ◽

Vol 11 (1) ◽

pp. 152 ◽

Cited By ~ 6

Author(s):

Jong-Ho Back ◽

Dooyoung Baek ◽

Jae-Ho Shin ◽

Seong-Wook Jang ◽

Hyun-Joong Kim ◽

...

Keyword(s):

Pore Size ◽

Epoxy Composite ◽

Impact Resistance ◽

Expansion Ratio ◽

Core Shell ◽

Scanning Calorimetry ◽

Composite Foam ◽

Foaming Agent ◽

Epoxy Foam ◽

The Impact

Epoxy foam adhesives are widely used for weight reduction, watertight property, and mechanical reinforcement effects. However, epoxy foam adhesives have poor impact resistance at higher expansion ratios. Hence, we prepared an epoxy composite foam adhesive with core–shell rubber (CSR) particles to improve the impact resistance and applied it to automotive structural adhesives. The curing behavior and pore structure were characterized by differential scanning calorimetry (DSC) and X-ray computed tomography (CT), respectively, and impact wedge–peel tests were conducted to quantitatively evaluate the resistance to cleavage of the CSR/epoxy composite foam adhesives under impact. At 5 and 10 phr CSR contents, the pore size and expansion ratio increased sufficiently due to the decrease in curing rate. However, at 20 phr CSR content, the pore size decreased, which might be due to the steric hindrance effect of the CSR particles. Notably, at 0 and 0.1 phr foaming agent contents, the resistance to cleavage of the adhesives under the impact wedge–peel condition significantly improved with increasing CSR content. Thus, the CSR/epoxy composite foam adhesive containing 0.1 phr foaming agent and 20 phr CSR particles showed high impact resistance (EC = 34,000 mJ/cm2) and sufficient expansion ratio (~148%).

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Internal stress of epoxy resin modified with acrylic core-shell particles containing functional groups prepared by seeded emulsion polymerization

Journal of Applied Polymer Science ◽

10.1002/app.1987.070330317 ◽

1987 ◽

Vol 33 (3) ◽

pp. 885-897 ◽

Cited By ~ 23

Author(s):

Yoshinobu Nakamura ◽

Haruo Tabata ◽

Hideto Suzuki ◽

Kazuo Iko ◽

Masa Yoshi Okubo ◽

...

Keyword(s):

Epoxy Resin ◽

Internal Stress ◽

Emulsion Polymerization ◽

Functional Groups ◽

Core Shell ◽

Seeded Emulsion Polymerization ◽

Shell Particles

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Impact Resistance Enhancement by Adding Core-Shell Particle to Epoxy Resin Modified with Hyperbranched Polymer

Polymers ◽

10.3390/polym9120684 ◽

2017 ◽

Vol 9 (12) ◽

pp. 684 ◽

Cited By ~ 7

Author(s):

Shuiping Li ◽

Qisheng Wu ◽

Huajun Zhu ◽

Qing Lin ◽

Chengshuang Wang

Keyword(s):

Epoxy Resin ◽

Hyperbranched Polymer ◽

Impact Resistance ◽

Core Shell ◽

Shell Particle

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Toughening of Bisphenol-A Diglycidyl Ether-based Epoxy by Modification with Hydroxyl-terminated Liquid Natural Rubber

ASEAN Journal on Science and Technology for Development ◽

10.29037/ajstd.346 ◽

2017 ◽

Vol 30 (1&2) ◽

pp. 22-28

Author(s):

H. L. Pham ◽

B. T. Do ◽

T. S. Pham ◽

D. G. Le

Keyword(s):

Bisphenol A ◽

Epoxy Resin ◽

Fenton Reaction ◽

Impact Resistance ◽

Diglycidyl Ether ◽

Toluene Diisocyanate ◽

Scanning Electronic Microscopy ◽

Bisphenol A Diglycidyl Ether ◽

Liquid Natural Rubber ◽

The Impact

Hydroxyl-terminated liquid natural rubbers (HTNRs), prepared by the Photo-Fenton reaction, were used to modify bisphenol-A diglycidyl ether-based epoxy (DGEBA). A chemical link between HTNRs and the epoxy resin was promoted employing toluene diisocyanate. The reactions between elastomers and epoxy resin were followed by FTIR. The mechanical properties of the composites were evaluated and the microstructure was investigated using scanning electronic microscopy. The results showed that the impact resistance of HTNR-modified DGEBA was superior to that of the pure epoxy resin. For the composites with HTNR, the impact resistance increased with elastomer concentration up to 2.5 parts per hundred parts of resin. Higher concentration of HTNR resulted in larger particles which gave lower impact values.

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Core/Shell PBA/PMMA-PGMA Nanoparticles to Enhance the Impact Resistance of UV-Cured Epoxy Systems

Macromolecular Materials and Engineering ◽

10.1002/mame.201200001 ◽

2012 ◽

Vol 298 (1) ◽

pp. 106-112 ◽

Cited By ~ 19

Author(s):

Mohamed Naguib ◽

Sabrina Grassini ◽

Marco Sangermano

Keyword(s):

Impact Resistance ◽

Core Shell ◽

The Impact ◽

Epoxy Systems

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The effect of hyperbranched polyester and zirconium slag nanoparticles on the impact resistance of epoxy resin thermosets

Composites Part B Engineering ◽

10.1016/j.compositesb.2015.04.048 ◽

2015 ◽

Vol 79 ◽

pp. 342-350 ◽

Cited By ~ 27

Author(s):

Shuiping Li ◽

Chong Cui ◽

Haijun Hou ◽

Qisheng Wu ◽

Shuang Zhang

Keyword(s):

Epoxy Resin ◽

Impact Resistance ◽

Hyperbranched Polyester ◽

The Impact

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Toughness and Thermal Properties of a Dimer Acid Modified Tetrafunctional Epoxy Resin

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.764-765.107 ◽

2015 ◽

Vol 764-765 ◽

pp. 107-110 ◽

Cited By ~ 1

Author(s):

Ming Ming Yu ◽

Bin Feng ◽

Min Yang ◽

Li Qi Liu ◽

Hong Li ◽

...

Keyword(s):

Thermal Properties ◽

Epoxy Resin ◽

Thermo Gravimetric Analysis ◽

Impact Resistance ◽

Mechanical Analysis ◽

Impact Testing ◽

Gravimetric Analysis ◽

Thermal Stabilities ◽

The Impact ◽

Tetrafunctional Epoxy

In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins in the premise of influencing the thermal properties as little as possible, the aromatic tetrafunctional epoxy named N,N,N’,N’-tetraglycidyl-4,4’-diaminodiphenyl ether (TGDDE) was modified by a dimer carboxylic acid (DFA), and then the epoxies were cured with methyl nadic anhydride (MNA). In the present work, the toughness was characterized with the impact resistance tested by pendulum impact testing. Besides, the thermal properties of the cured epoxy resin were investigated with the thermo-gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The impact testing results indicated that the toughness of the cured resins could be improved after the modification and increased with the increasing content of DFA. The thermal analysis showed that the thermal properties of the cured resins were not influenced obviously since the thermal stabilities of the products could be improved and the glass transition temperature of them were not influenced obviously when the tetrafunctional epoxy modified with appropriate content of DFA.

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