News Details
Determination of epoxy chain extender
2017-2-22 17:44:45
Determination of epoxy chain extender, SMC infrared spectrometry. By using synthetic method of polymer light reflex of SMC copolymerization product for infrared analysis.
R2PET react with chain extender to blend. Will R2PET 4 h at 120 ℃ dry, cool to room temperature, according to take 70 g seal and set aside. Synthetic chain extender SMC and dried R2PET huck torque rheometer in the communist party of China, the temperature of 260 ℃, the rotor speed 40 r/min, the reaction time for 30 min, will react after the PET samples. With epoxy that offers on the market chain extender ADR repeat the experiment to compare.
Epoxy chain extender on the determination of the characteristic viscosity.methods. To the quality of 1:1 ratio of phenol 2 tetrachloroethane as solvent, by ubbelohde viscometer, respectively (25 + 011 ℃ after pure solvents, R2PET and chain extender PET solution out of the time, calculated using the type: [eta] = [2 (eta sp - ln eta r)] 1/2 (dL/g)/C type: [eta] - characteristic viscosity.methods; C - sample mass concentration (g/mL); Eta sp - increase than viscosity; Eta r --, relative viscosity.
Epoxy chain extender on the determination of the carboxyl content. After a certain amount of chain extender PET soluble in phenol chloroform 2 (mass ratio 1:1) as solvent, with four bromine phenol as the indicator, with 0101 mol/L KOH2 methanol standard solution titration. Appear blue and 10 s do not fade, titration arrives at the finish line. Press type calculation of carboxyl content (CV) : CV = (V - where V0) * N * 103 / G (mol/t) : V - used the volume of standard solution, titration sample mL; Where V0 - titration blank sample with the volume of standard solution (mL); N --, standard solution concentration of substance (mol/L); G - the quality of the sample (G).
DSC analysis of extender chain PET. Said to take a certain amount of chain extender PET products, eliminate thermal history, from 40 ℃ to 10 ℃ / min rate up to 300 ℃, the measured temperature process chain extension of the DSC spectra of PET.
Epoxy chain extender on the determination of SMC, chain extender infrared spectrum analysis of SMC. As you can see,, 760101 cm, 701161 cm - 1-1 of absorption peak is characteristic of monocyclic instead of benzene, corresponding to the copolymer of styrene unit structure, is 1725187 cm - 1 carbonyl absorption peak, 908142 cm - 1 epoxide group characteristic peaks, corresponding EMC structural unit in the copolymer.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Compared with polystyrene infrared spectrogram, as you can see samples of SMC in 2830 cm - 1, 3025 cm, 2924 cm - 1-1 of the absorption peaks in contrast is very weak. Free radical copolymerization reaction is more complex, in addition to the styrene 2 EMC copolymerization reaction want copolymerization product, are likely to generate their own homopolymer, if less content of EMC monomer run out ahead of time, the late generation of polystyrene homopolymer is don't want to get the experiments, therefore must control the reaction temperature and reaction time.
2830 cm - 1, 3025 cm, 2924 cm - 1-1 of the absorption peak is corresponding groups CH2 - and - CH - C - H stretching vibration. Polystyrene here has a strong absorption, and EMC of styrene and copolymerization product because there is EMC structure unit, its molecular structure of the C = O groups can make with the adjacent groups CH2 - and - CH - C - H stretching vibration absorption intensity greatly reduced, so the absorption peak of very weak here. To sum up, which can determine emc copolymer styrene polymerization product is 2.
In huck rheometer to R2PET reaction blending with SMC, make R2PET extender chain add sticky, and compared with ADR extender chain effect.
Synthesis of chain extender chain extension effect and the use of chain extender on the market reached a similar level of chain extender, make R2PET characteristic viscosity.methods increased by about 20%, reached $0157, carboxyl content is reduced by 70%, make R2PET can use again, achieve the goal of the recovery. And in the characteristic viscosity.methods and carboxyl content indicators are slightly more than the commercial chain extender ADR.
DSC analysis. After extender chain of PET with PET without chain extender DSC analysis and comparison. R2PET extender chain before and after the basic thermal performance without big changes. Extender chain reaction have little impact on the inherent properties of the PET, chain extender R2PET can reproduce after processing.
When DMPA content is low, the emulsion viscosity changes along with the increase of DMPA content is not obvious, this may be related to the increase of the content of hydrophilic groups can lead to two opposite results. The increase of the hydrophilic group content on the one hand lead to enhanced hydrophilicity, make the size of the particles; On the other hand, the increase of total ion concentration, lead to the increase of total electric double layer thickness and the increase of particle volume of fluid dynamics, the particle size increases.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
R2PET react with chain extender to blend. Will R2PET 4 h at 120 ℃ dry, cool to room temperature, according to take 70 g seal and set aside. Synthetic chain extender SMC and dried R2PET huck torque rheometer in the communist party of China, the temperature of 260 ℃, the rotor speed 40 r/min, the reaction time for 30 min, will react after the PET samples. With epoxy that offers on the market chain extender ADR repeat the experiment to compare.
Epoxy chain extender on the determination of the characteristic viscosity.methods. To the quality of 1:1 ratio of phenol 2 tetrachloroethane as solvent, by ubbelohde viscometer, respectively (25 + 011 ℃ after pure solvents, R2PET and chain extender PET solution out of the time, calculated using the type: [eta] = [2 (eta sp - ln eta r)] 1/2 (dL/g)/C type: [eta] - characteristic viscosity.methods; C - sample mass concentration (g/mL); Eta sp - increase than viscosity; Eta r --, relative viscosity.
Epoxy chain extender on the determination of the carboxyl content. After a certain amount of chain extender PET soluble in phenol chloroform 2 (mass ratio 1:1) as solvent, with four bromine phenol as the indicator, with 0101 mol/L KOH2 methanol standard solution titration. Appear blue and 10 s do not fade, titration arrives at the finish line. Press type calculation of carboxyl content (CV) : CV = (V - where V0) * N * 103 / G (mol/t) : V - used the volume of standard solution, titration sample mL; Where V0 - titration blank sample with the volume of standard solution (mL); N --, standard solution concentration of substance (mol/L); G - the quality of the sample (G).
DSC analysis of extender chain PET. Said to take a certain amount of chain extender PET products, eliminate thermal history, from 40 ℃ to 10 ℃ / min rate up to 300 ℃, the measured temperature process chain extension of the DSC spectra of PET.
Epoxy chain extender on the determination of SMC, chain extender infrared spectrum analysis of SMC. As you can see,, 760101 cm, 701161 cm - 1-1 of absorption peak is characteristic of monocyclic instead of benzene, corresponding to the copolymer of styrene unit structure, is 1725187 cm - 1 carbonyl absorption peak, 908142 cm - 1 epoxide group characteristic peaks, corresponding EMC structural unit in the copolymer.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Compared with polystyrene infrared spectrogram, as you can see samples of SMC in 2830 cm - 1, 3025 cm, 2924 cm - 1-1 of the absorption peaks in contrast is very weak. Free radical copolymerization reaction is more complex, in addition to the styrene 2 EMC copolymerization reaction want copolymerization product, are likely to generate their own homopolymer, if less content of EMC monomer run out ahead of time, the late generation of polystyrene homopolymer is don't want to get the experiments, therefore must control the reaction temperature and reaction time.
2830 cm - 1, 3025 cm, 2924 cm - 1-1 of the absorption peak is corresponding groups CH2 - and - CH - C - H stretching vibration. Polystyrene here has a strong absorption, and EMC of styrene and copolymerization product because there is EMC structure unit, its molecular structure of the C = O groups can make with the adjacent groups CH2 - and - CH - C - H stretching vibration absorption intensity greatly reduced, so the absorption peak of very weak here. To sum up, which can determine emc copolymer styrene polymerization product is 2.
In huck rheometer to R2PET reaction blending with SMC, make R2PET extender chain add sticky, and compared with ADR extender chain effect.
Synthesis of chain extender chain extension effect and the use of chain extender on the market reached a similar level of chain extender, make R2PET characteristic viscosity.methods increased by about 20%, reached $0157, carboxyl content is reduced by 70%, make R2PET can use again, achieve the goal of the recovery. And in the characteristic viscosity.methods and carboxyl content indicators are slightly more than the commercial chain extender ADR.
DSC analysis. After extender chain of PET with PET without chain extender DSC analysis and comparison. R2PET extender chain before and after the basic thermal performance without big changes. Extender chain reaction have little impact on the inherent properties of the PET, chain extender R2PET can reproduce after processing.
When DMPA content is low, the emulsion viscosity changes along with the increase of DMPA content is not obvious, this may be related to the increase of the content of hydrophilic groups can lead to two opposite results. The increase of the hydrophilic group content on the one hand lead to enhanced hydrophilicity, make the size of the particles; On the other hand, the increase of total ion concentration, lead to the increase of total electric double layer thickness and the increase of particle volume of fluid dynamics, the particle size increases.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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