Nonisothermal cure kinetics and diffusion effect of liquid-crystalline epoxy sulfonyl bis(1,4-phenylene)bis[4-(2,3-epoxypropyloxy)benzoate] resin with aromatic diamine

2012 ◽  
Vol 125 (5) ◽  
pp. 3329-3334 ◽  
Author(s):  
Jungang Gao ◽  
Li Huo ◽  
Yonggang Du
Keyword(s):  
Liquid Crystalline ◽  
Cure Kinetics ◽  
Aromatic Diamine ◽  
Diffusion Effect ◽  
Liquid Crystalline Epoxy ◽  
And Diffusion ◽  
Nonisothermal Cure

Synthesis of Three Novel Aromatic Biazomethine Liquid- Crystalline Epoxy Resins and Curing Reaction with Aromatic Diamine

2011 ◽  
Vol 216 ◽  
pp. 34-38
Author(s):  
Jun Gang Gao ◽  
Xiao Na Zhang ◽  
Yong Gang Du
Keyword(s):  
Melting Point ◽  
Epoxy Resins ◽  
Liquid Crystalline ◽  
Diphenyl Ether ◽  
Hydroxyl Group ◽  
Aromatic Diamine ◽  
Curing Reaction ◽  
Ozawa Equation ◽  
Liquid Crystalline Epoxy ◽  
Clearing Temperature

Three class of novel liquid crystalline epoxy resins containing azomething groups: N,N’-Bis[4-(2,3-epoxypropoxy)benzylidene]-4,4-diamino-diphenyl ether (p-BEPBDDE), N,N’-Bis[4-(2,3-epoxypropoxy)benzylidene]-4,4-diamino-diphenyl methane (p-BEPBDDM) and N,N’-Bis[(4-(2,3-epoxypropoxy)-benzyliden)-1,4- phenylene diamine] (p-BEPBPD) were synthesized and characterized. The results show that p-BEBDDE and p-BEBDDM belong to smectic texture and melting point is 239.5 and 178 oC, respectively. The p-BEPBD is nematic texture between its melting temperature (Tm) of 192 oC and clearing temperature (Ti) of 238 oC. The curing reaction can be described by Ozawa equation, and the alcohol-hydroxyl group can accelerate the curing reaction and decrease Ea in DSC experiment.

Synthesis of Liquid Crystalline Epoxy Resin p-BDEPB and Cure Kinetics with 3-MeTHPA

2010 ◽  
Vol 428-429 ◽  
pp. 71-74 ◽  
Author(s):  
Jun Gang Gao ◽  
Cai Yun Zhang ◽  
Li Huo ◽  
Yuan Yuan Zhang
Keyword(s):  
Epoxy Resin ◽  
Liquid Crystalline ◽  
Allyl Bromide ◽  
Cure Kinetics ◽  
Curing Temperature ◽  
Gel Point ◽  
Liquid Crystalline Epoxy ◽  
Clearing Point ◽  
Reaction Orders ◽  
Epoxy Value

A liquid crystalline epoxy resin of p-biphenylene di-4-(2,3-epoxypropyloxy)benzoate (p-BDEPB) was synthesized from allyl bromide, 4-hydroxy ethyl benzoate and 4,4-dihydroxybiphenyl. Its structure and liquid crystalline behavior were characterized by DSC, 1H-NMR, FTIR, POM and XRD. The results are shown that this compound is smectic liquid crystalline.The melting point of p-BDEPB is 210 oC and clearing point is over 300 oC, the epoxy value is 0.312 mol/100g. The average curing Ea of p-BDEPB/3-methyl-tetrahydrophthalic anhydride (MeTHPA) system is 97.2kJ/mol. The gel point of cured-system Tgel is 89.0 oC, curing temperature Tcu is 132.5 oC and finishing temperature Tf is 146.5 oC. The curing reaction can be described by the autocatalytic Šesták-Berggren (S-B) equation, the two reaction orders m and n is 0.23 and 0.74, respectively.

Preparation and cure kinetics of epoxy with nanodiamond modified with liquid crystalline epoxy

2018 ◽  
Vol 663 ◽  
pp. 1-8 ◽  
Author(s):  
Xin Luo ◽  
Xiaoyan Yu ◽  
Yuanhui Ma ◽  
Kimiyoshi Naito ◽  
Qingxin Zhang
Keyword(s):  
Liquid Crystalline ◽  
Cure Kinetics ◽  
Liquid Crystalline Epoxy ◽  
Kinetics Of

Thermal properties and cure kinetics of a liquid crystalline epoxy resin with biphenyl-aromatic ester mesogen

2011 ◽  
Vol 513 (1-2) ◽  
pp. 88-93 ◽  
Author(s):  
Yin-Ling Liu ◽  
Zhi-Qi Cai ◽  
Xiufang Wen ◽  
Pihui Pi ◽  
Dafeng Zheng ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Epoxy Resin ◽  
Liquid Crystalline ◽  
Cure Kinetics ◽  
Aromatic Ester ◽  
Liquid Crystalline Epoxy ◽  
Kinetics Of

A novel wholly aromatic liquid crystalline epoxy monomer based on 2,7-naphthalene mesogen: Synthesis and curing with aromatic diamine

2013 ◽  
Vol 21 (10) ◽  
pp. 1105-1109 ◽  
Author(s):  
Le Hoang Sinh ◽  
Seunghan Shin ◽  
Dong-Guk Lim ◽  
Nguyen Ngoc Trung ◽  
Bui Thanh Son ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Aromatic Diamine ◽  
Epoxy Monomer ◽  
Liquid Crystalline Epoxy
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