Thermomechanical and morphological properties of epoxy resins modified with functionalized hyperbranched polyester

2006 ◽  
Vol 46 (11) ◽  
pp. 1502-1511 ◽  
Author(s):  
I. Blanco ◽  
G. Cicala ◽  
C. Lo Faro ◽  
O. Motta ◽  
G. Recca
Keyword(s):  
Epoxy Resins ◽  
Morphological Properties ◽  
Hyperbranched Polyester

Curing behavior and toughening performance of epoxy resins containing hyperbranched polyester

2004 ◽  
Vol 15 (11) ◽  
pp. 639-644 ◽  
Author(s):  
Gang Xu ◽  
Wenfang Shi ◽  
Ming Gong ◽  
Fei Yu ◽  
Jianping Feng
Keyword(s):  
Epoxy Resins ◽  
Hyperbranched Polyester ◽  
Curing Behavior

The mechanical behaviors of epoxy-terminated hyperbranched polyester (E-HBP) as toughener in different epoxy resins

2018 ◽  
Vol 1 (2) ◽  
pp. 310-319 ◽  
Author(s):  
Min Xia ◽  
Huilian Yang ◽  
Jian Ling ◽  
Qifa Yao ◽  
Guoping Li ◽  
...  
Keyword(s):  
Epoxy Resins ◽  
Hyperbranched Polyester ◽  
Mechanical Behaviors

Preparation and toughening performance investigation of epoxy resins containing carbon nanotubes modified with hyperbranched polyester

2017 ◽  
Vol 75 (3) ◽  
pp. 1013-1026 ◽  
Author(s):  
Zengheng Hao ◽  
Lu Li ◽  
Xia Liao ◽  
Xingyue Sheng ◽  
Yi Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Epoxy Resins ◽  
Hyperbranched Polyester

Effect of stoichiometric ratios for synthesized epoxy phenolic novolac (EPN) resins on their physicochemical, thermomechanical and morphological properties

2016 ◽  
Vol 45 (4) ◽  
pp. 265-279 ◽  
Author(s):  
Abhishek Das ◽  
Gautam Sarkhel
Keyword(s):  
Epoxy Resin ◽  
Epoxy Resins ◽  
Phenol Formaldehyde ◽  
Protective Coatings ◽  
Stoichiometric Composition ◽  
Morphological Properties ◽  
Mechanical And Thermal Properties ◽  
Content Type ◽  
Structural Applications ◽  
Stoichiometric Ratios

Purpose The purpose of this paper is to study the effect of various stoichiometric ratios for synthesised epoxy phenolic novolac (EPN) resins on their physicochemical, thermomechanical and morphological properties. Design/methodology/approach In the present study, EPN (EPN-1, EPN-2, EPN-3, EPN-4 and EPN-5) resins were synthesised by varying five types of different stoichiometric ratios for phenol/formaldehyde along with the corresponding molar ratios for novolac/epichlorohydrin. Their different physicochemical properties of interest, thermomechanical properties as well as morphological properties were studied by means of cured samples with the variation of its stoichiometric ratios. Findings The average functionality and reactivity of EPN resin can be controlled by controlling epoxy equivalence as well as cross-linking density upon its curing as all of these factors are internally correlated with each other. Research limitations/implications Epoxy resins are characterised by a three-membered ring known as the epoxy or oxirane group. The capability of the epoxy ring to react with a variety of substrates imparts versatility to the resin. However, these resins have a major drawback of low toughness, and they are also very brittle, which limits their application in products that require high impact and fracture strength. Practical implications Epoxy resins have been widely used as high-performance adhesives and matrix resins for composites because of their outstanding mechanical and thermal properties. Because of their highly cross-linked structure, the epoxy resin disables segmental movement, making them hard, and it is also notch sensitive, having very low fracture energy. Social implications Epoxy resin is widely used in industry as protective coatings and for structural applications, such as laminates and composites, tooling, moulding, casting, bonding and adhesives. Originality/value Systematic study has been done for the first time, as no exact quantitative stoichiometric data for the synthesis of EPN resin were available on the changes of its different properties. Thus, an optimised stoichiometric composition for the synthesis of the EPN resin was found.

New pegylated hyperbranched polyester as chemical modifier of epoxy resins in UV cationic photocuring

2011 ◽  
Vol 71 (4) ◽  
pp. 417-424 ◽  
Author(s):  
D. Foix ◽  
X. Fernández-Francos ◽  
X. Ramis ◽  
A. Serra ◽  
M. Sangermano
Keyword(s):  
Epoxy Resins ◽  
Chemical Modifier ◽  
Hyperbranched Polyester
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