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Periodical of Ying La electron (2007.12)
From;    Author:Stand originally

System of colophony of phenolic aldehyde of annulus oxygen & studies progress is rapid

Epoxy resin itself is a kind thermoplastic high polymer gets together beforehand content, alone existence did not use value almost, the cross-linking that joins solidify agent to make only forms meshy and stereo structure, ability body reveals each good performance, the performance of the application because of this epoxy resin and solidify child is very great to the dependence of solidify agent. Thermoplastic phenolic aldehyde colophony (Novolac Resin) and armour colophony of phenolic aldehyde of sex of rank heat solid (the solidify agent that Resol Resin) all can regard epoxy resin as, development application is at present more is thermoplastic phenolic aldehyde colophony, there already was wide application in the respect such as coating, felt, lamination, mould. According to expert introduction, home is current epoxy resin / the research of Novolac colophony system, get attention greatly relatively and have rapidder progress, courtyard of a Confucian school of idealist philosophy of the Song and Ming Dynasties of university of industry of north of its Chinese and Western applies the expert of Chemstry Department, used dynamic DSC method to study relevant data is right recently phenolic aldehyde of double phenolic F (the influence that BPFN) system solidify reacts.

Northwest labour basically studied greatly dosage of accelerant sort, accelerant, change phenolic aldehyde of A of double phenol of form of line of epoxy resin A80/novolac, A80/ to bromine (phenolic aldehyde of F of double phenol of BPAN) and A80/ line form (the influence that BPFN) system solidify reacts. The expert says, study the result makes clear: DMP-30, 6 methylic 4 amine (Zun of methylic Mi of HMTA) and 2- (2-MZ) to A80/ the solidify of system of phenolic aldehyde of form of 3 kinds of lines all has stimulative effect. Along with temperature elevatory gel time takes logarithmic curve linear to drop; Increase along with accelerant dosage, gel time takes logarithm one temperature curve to microtherm direction translation; With 2-MZ(0.1 portion) as accelerant, the solidify of system of A80 of solidify of phenolic aldehyde of form of 3 kinds of lines reacts the peak of radiative peak carries temperature on the head to all be 155 ℃ left and right sides, among them the solidify temperature range of A80/BPFN system is wider make an appointment with 55 ℃ , fall 2 hours in 150 ℃ condition but solidify is complete. Use colophony of phenolic aldehyde of A of line form double phenol to make solidify lotion, can solve epoxy resin of solidify of double cyanogen amine to mix epoxy resin of difference of sex of be in harmony and dot of occurrence tea splash and solidify of colophony of general phenolic aldehyde to become angry well wait for inadequacy; Its plank has tall hear resistance and dimension stability not only, mix in function of report of high temperature discolouration, interpose be able to bear or endure respect of ionic and migratory sex, also have clear improvement. Another kind of type is colophony of phenolic aldehyde of double phenolic F (BPFN) , as a result of element of double phenolic A medium different propyl structure restricted the whirl of catenary, make molecular tigidity bigger consequently, the impact resistance that may cause a system can be poorer, if change the structure of different propyl the structure of methylene, catenary paragraph rotate to reduce the tigidity of unlimited, catenary, be helpful for impact resistance can rise.
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