Simultaneously Toughening and Reinforcing Modification of Benzoxazineresin with Hyperbranched Epoxy

doi:10.11901/1005.3093.2016.172

Chinese Journal of Materials Research

2017, Vol. 31

Issue (2): 145-151 DOI: 10.11901/1005.3093.2016.172

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Simultaneously Toughening and Reinforcing Modification of Benzoxazineresin with Hyperbranched Epoxy

Qifeng JIN^1,²(

),Dongyue JIANG²,Lina TONG²,Liyuan TAN²

1 Key Laboratory of New Materials and Technology for Packaging, Hunan University of Technology, Zhuzhou 412007, China
2 School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China

Cite this article:

Qifeng JIN,Dongyue JIANG,Lina TONG,Liyuan TAN. Simultaneously Toughening and Reinforcing Modification of Benzoxazineresin with Hyperbranched Epoxy. Chinese Journal of Materials Research, 2017, 31(2): 145-151.

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Abstract

Fullycompatibleblend cured resins DDM/AHEP were prepared by incorporating different among of aliphaticand epoxide-functional hyperbranched polymer (AHEP) into an aromatic-diamine typebenzoxazine(DDM) network without cure-induced phase separation. Then their structure and thermo-mechanical property were investigated by means of FTIR,DSC and DMA. The results show that the Young's modulus and impact toughness of DDM could be simultaneously enhanced by the incorporating AHEP.Flexural strength and impact strength of the cured DDM/AHEP blend approach a maximum for5% incorporationof AHEP, representing an increase of over 11.5% and 167% respectively in comparison to that of the original DDM. The fracture surface morphology of the cured blend has the characteristic of in-situ toughness enhancement.

Key words: organic polymer materials hyperbranched epoxy polybenzoxazine curing reaction modification

Received: 31 March 2016

Fund: Supported by Doctoral Foundation of Liaoning Province (No.20111066)

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	Qifeng JIN
	Dongyue JIANG
	Lina TONG
	Liyuan TAN

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https://www.cjmr.org/EN/10.11901/1005.3093.2016.172 OR https://www.cjmr.org/EN/Y2017/V31/I2/145

Fig.1 FTIR spectraof DDM, PDDMandcured DDM/AHEP-10 blend

Fig.2 Copolymerization of DDM and AHEP

Fig.3 DSC curves of DDM and DDM/AHEP-10 blend

Table 1 △E、 A and n of DDM and DDM/AHEP-10 blend

Table2 Heat of reaction and the curing degree of DDM/AHEP blends

Table3 Crosslink density of cured DDM/AHEP blends

Fig.4 Tanδ as a function of AHEP content in cured DDM/AHEP blends

Fig.5 Flexural strength of cured DDM/AHEP blends as a function of AHEP content

Fig.6 Flexural modulus of cured DDM/AHEP blends as a function of AHEP content

Fig.7 Impact strength of cured DDM/AHEP blends as a function of AHEP content

Fig.8 SEM images of fracture surfaces from impact specimens (a) cured DDM sample, (b) cured DDM/AHEP-10 blend

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