News Details
Paint crosslinking agent for perfusion resin
2017-8-1 17:00:33
Paint crosslinking agent for perfusion resin
The effect of different crosslinking conditions on the crosslinking agent of the perfusion resin was studied by using different crosslinking conditions for the crosslinking epoxy casting body, and the glass transition temperature and static mechanical properties were tested. The test results show that Tg has the best value.
By testing result of epoxy resin in 40 ℃, 10 h after accepting the league again after 70 ℃, 3 h after crosslinking measured tensile strength, bending strength and compression strength is 40 ℃, respectively, 10 h crosslinking increased by 11.64%, 14.72% and 20.61%, can achieve better crosslinking performance.
By studying the epoxy casting body tension and bending load - displacement curve, found perfusion resin with crosslinking agent of epoxy resin after crosslinking after higher temperature of crosslinking can effectively reduce the stress of the system, to get better performance more smoothly.
With the rapid development of wind turbine blades, epoxy resin is used in the production of blades, and the epoxy resin as the main substrate material for blade formation can provide good mechanical properties.
Perfusion resin with crosslinking temperature of crosslinking agent on the crosslinking content has important influence on the performance of, the same kind of resin under different conditions of crosslinking crosslinking performance may vary greatly, so need to seek the best crosslinking system. The defects of unconnected epoxy resins with inhomogeneity density, large internal stress, brittle quality and impact resistance have limited its application to wind turbine blades.
Crosslinking reaction belongs to the chemical reaction, is highly affected by the crosslinking temperature, temperature increase reaction speed, but the crosslinking temperature often makes crosslinking performance, so there is crosslinking temperature limit, must choose proper crosslinking rate and crosslinking performance compromise as a proper crosslinking temperature.
According to crosslinking temperature, crosslinking agent can be classified into four categories: 1) crosslinking agent at room temperature; 2) at room temperature to 50 ℃ crosslinking crosslinking agent at room temperature; 3) in 50 ~ 100 ℃ temperature crosslinking agent; 4) in the high temperature of 100 ℃ above crosslinking agent.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
The effect of different crosslinking conditions on the crosslinking agent of the perfusion resin was studied by using different crosslinking conditions for the crosslinking epoxy casting body, and the glass transition temperature and static mechanical properties were tested. The test results show that Tg has the best value.
By testing result of epoxy resin in 40 ℃, 10 h after accepting the league again after 70 ℃, 3 h after crosslinking measured tensile strength, bending strength and compression strength is 40 ℃, respectively, 10 h crosslinking increased by 11.64%, 14.72% and 20.61%, can achieve better crosslinking performance.
By studying the epoxy casting body tension and bending load - displacement curve, found perfusion resin with crosslinking agent of epoxy resin after crosslinking after higher temperature of crosslinking can effectively reduce the stress of the system, to get better performance more smoothly.
With the rapid development of wind turbine blades, epoxy resin is used in the production of blades, and the epoxy resin as the main substrate material for blade formation can provide good mechanical properties.
Perfusion resin with crosslinking temperature of crosslinking agent on the crosslinking content has important influence on the performance of, the same kind of resin under different conditions of crosslinking crosslinking performance may vary greatly, so need to seek the best crosslinking system. The defects of unconnected epoxy resins with inhomogeneity density, large internal stress, brittle quality and impact resistance have limited its application to wind turbine blades.
Crosslinking reaction belongs to the chemical reaction, is highly affected by the crosslinking temperature, temperature increase reaction speed, but the crosslinking temperature often makes crosslinking performance, so there is crosslinking temperature limit, must choose proper crosslinking rate and crosslinking performance compromise as a proper crosslinking temperature.
According to crosslinking temperature, crosslinking agent can be classified into four categories: 1) crosslinking agent at room temperature; 2) at room temperature to 50 ℃ crosslinking crosslinking agent at room temperature; 3) in 50 ~ 100 ℃ temperature crosslinking agent; 4) in the high temperature of 100 ℃ above crosslinking agent.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
In order to better ensure the application of epoxy resin infusion on the blade, based on epoxy resin at room temperature of crosslinking and crosslinking, room temperature in accepting the league again after the medium temperature of crosslinking and temperature after accepting the league to higher temperature under the conditions of crosslinking and the glass transition temperature and mechanical properties of test data, the research of epoxy resin under different conditions of crosslinking performance changes.
Materials and instruments. Bisphenol A low viscosity epoxy resin (epoxy value 0.54 ~ 0.58) and polyamine as the main crosslinking agent, according to the quality proportion of 100:30. Universal tension machine: metert CMT5105. Differential scanning calorimetry (DSC) : Swiss mettler DSC821e.
Resin system glass transition temperature (Tg) test. The epoxy resin and crosslinking agent are mixed according to the proportion, and the crosslinking procedure is conducted according to the set of the crosslinking procedure. The Tg analysis of the cross - linked samples was carried out by the differential scanning calorimeter of mettler. The glass transition temperature is tested to 20 ℃ / min, nitrogen gas flow rate is 50 ml/min.
Resin casting system preparation and performance testing. Place the epoxy resin and assembled mould oven in 40 ℃ placed 1 h, the proportion of epoxy resins and crosslinking agent according to the good, mix in the vacuum deaeration box when vacuum deaeration 15 min after hitting 0.1 Mpa for deaeration finished slowly deflated, plastic injection mold casting body fluid drainage, then casting mould in the vacuum deaeration tank body deaeration 15 min, will be good to take off the bubble of the casting body and put it in the oven heating according to the heating procedure set by the crosslinking. Prepared samples are tested for tensile, bending and compression of the universal tension machine by GB/t2567-2008.
Influence of different crosslinking processes on Tg. The Tg is the transition temperature of the chain segment from freezing to movement, while the chain segment movement is realized through the single bond of the main chain, the higher the flexibility of the polymer chain segment is, the lower the Tg is. Other molecular chain end concentration is have effect on Tg, chain end than the middle section is restricted by the molecular chain, movement more easily than chain in the middle, so the smaller molecular chain segments chain end concentration was, the higher the Tg.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
In order to better ensure the application of epoxy resin infusion on the blade, based on epoxy resin at room temperature of crosslinking and crosslinking, room temperature in accepting the league again after the medium temperature of crosslinking and temperature after accepting the league to higher temperature under the conditions of crosslinking and the glass transition temperature and mechanical properties of test data, the research of epoxy resin under different conditions of crosslinking performance changes.
Materials and instruments. Bisphenol A low viscosity epoxy resin (epoxy value 0.54 ~ 0.58) and polyamine as the main crosslinking agent, according to the quality proportion of 100:30. Universal tension machine: metert CMT5105. Differential scanning calorimetry (DSC) : Swiss mettler DSC821e.
Resin system glass transition temperature (Tg) test. The epoxy resin and crosslinking agent are mixed according to the proportion, and the crosslinking procedure is conducted according to the set of the crosslinking procedure. The Tg analysis of the cross - linked samples was carried out by the differential scanning calorimeter of mettler. The glass transition temperature is tested to 20 ℃ / min, nitrogen gas flow rate is 50 ml/min.
Resin casting system preparation and performance testing. Place the epoxy resin and assembled mould oven in 40 ℃ placed 1 h, the proportion of epoxy resins and crosslinking agent according to the good, mix in the vacuum deaeration box when vacuum deaeration 15 min after hitting 0.1 Mpa for deaeration finished slowly deflated, plastic injection mold casting body fluid drainage, then casting mould in the vacuum deaeration tank body deaeration 15 min, will be good to take off the bubble of the casting body and put it in the oven heating according to the heating procedure set by the crosslinking. Prepared samples are tested for tensile, bending and compression of the universal tension machine by GB/t2567-2008.
Influence of different crosslinking processes on Tg. The Tg is the transition temperature of the chain segment from freezing to movement, while the chain segment movement is realized through the single bond of the main chain, the higher the flexibility of the polymer chain segment is, the lower the Tg is. Other molecular chain end concentration is have effect on Tg, chain end than the middle section is restricted by the molecular chain, movement more easily than chain in the middle, so the smaller molecular chain segments chain end concentration was, the higher the Tg.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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