News Details
Chain extender on the application of the PC
2017-2-27 12:18:05
Chain extender on the application of the PC, multi-functional reactive polymer ester, through chemical reaction and have degradable polymer, restore its original characteristics of molecular weight and viscosity, increase the melt viscosity, thus improve the mechanical and processing performance of the low performance recovery. Curve move to the right, obviously improve the thermal stability; And add the quantity more than 016%, after slow pyrolysis curve moves to the right trend.
Chain extender on the mechanical behavior of recycled PC. The size of the mechanical properties of polycarbonate depends on its molecular weight. To a certain extent, the higher the molecular weight of its mechanical performance is good, the better toughness. So on macroscopic mechanical properties of high and low molecular weight also reflects the PCS.
Chain extender ADR - 4368 PC of the increase of tensile strength than the RPS - 1005. The tensile strength of the initial recycled PC almost with ADR - 4368 is increased with the increase of adding amount of; Adding amount was 1.5%, the tensile strength of about 64 mpa, higher than the unmodified regeneration PC 215 mpa.
The results show that the ADR - 4368 PC of the molecular chain of certain coupling effect, the effective tensile strength improved. The RPS - 1005 PC of the tensile strength increase is not obvious, this may react with it and PC molecular chains exist in the form of grafting, after lead to free volume to increase between PC molecular chains, the weakening of molecular inter-atomic forces. When the RPS - 1005 amount to 0.9%, the tensile strength of the recycled PC is highest, after more than the critical value, the tensile strength and decreased with the increase of the content instead. May be not involved in the reaction of chain extender on the material in lubrication.
RPS - 1005 PC of the impact strength of improved significantly, improve the nearly seven times, and the pure PC, its optimum adding amount at around 016%. While the impact strength of ADR - 4368 PC of increase is smaller. That type epoxy chain extender on recycled PC toughness increase more significantly. Chain extender PC glass transition temperature of thermal analysis results with the influence of the mechanical properties and rheological properties of consistent results, further confirmed that the two kinds of chain extender for regeneration effects of different extender chain of PC, but the reason it remains to be further analysis and research.
With different adding amount of RPS - 1005 chain extension modification of recycled PC DSC test, the glass transition temperature (Tg) data curve as shown in figure 4. With the increase of the content of RPS - 1005 recycled PC Tg gradually increase; But more than 019% after Tg instead begin to decline. Suggests that the right amount of chain extender can to a certain extent, improve the regeneration of PC, molecular weight reduce polymer molecular chain peristalsis ability, Tg increased; And add the chain extender can reduce Tg instead of excessive, adverse to heat resistance.
The activity of the experimental results show that different chain extender and modification effects of adding quantity of recycled PC have varying degrees of impact. ADR - 4368 mainly is to increase the tensile strength of the material, and the improvement of impact strength is not obvious; Regeneration and RPS - 1005 greatly improve the impact strength of PC, but the improvement of the tensile strength is not obvious.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Rheological study, chain extender RPS - 1005 PC of the viscosity of the increase is more obvious. DSC and TGA analysis results show that two kinds of chain extender were increased regeneration PC viscosity and heat resistance, but the content is more than a certain value on the material's thermal stability. Among them, the RPS - 1005 PC of improving the thermal stability of the effect is more prominent.
Chain extender effects on regeneration PC rheological properties. Two kinds of chain extender to join all the balance of regeneration of the PC melt torque increased to different extent, prove that the viscosity of the extender chain reaction regeneration after PC. In comparison, the chain extender ADR - 4368 no significant impact on the regeneration of the PC melt torque, the RPS - 1005 after adding amount is more than 013%, regeneration of the PC melt balance torque increased significantly. The results show that the RPS - 1005 extender chain effect is better than that of ADR - 4368.
Chain extender on the thermal performance of regenerative PC. The TGA analysis of two different chain extender and modified regenerative thermal stability of PC. Comparison shows that modified with two kinds of chain extender recycled PC increased, the thermal stability of the RPS - 1005 is better.
This research mainly through the chain extension regeneration PC on the mechanical, rheological and thermal properties before and after comparison and analysis to discuss two different types of chain extender on recycled PC extender chain effect, and looking for better add quantity, so as to improve the use of recycled PC performance.
Chain extender appearance density (g/cm3) molecular weight/MwTg/e/e thermal decomposition temperature
Testing machine; By torque rheometer sample at a certain speed and temperature of torque - time relationship, and characterization of viscosity change. Rheometer parameter Settings: set to a temperature of 250 e, the speed of 80 r/m.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Chain extender on the mechanical behavior of recycled PC. The size of the mechanical properties of polycarbonate depends on its molecular weight. To a certain extent, the higher the molecular weight of its mechanical performance is good, the better toughness. So on macroscopic mechanical properties of high and low molecular weight also reflects the PCS.
Chain extender ADR - 4368 PC of the increase of tensile strength than the RPS - 1005. The tensile strength of the initial recycled PC almost with ADR - 4368 is increased with the increase of adding amount of; Adding amount was 1.5%, the tensile strength of about 64 mpa, higher than the unmodified regeneration PC 215 mpa.
The results show that the ADR - 4368 PC of the molecular chain of certain coupling effect, the effective tensile strength improved. The RPS - 1005 PC of the tensile strength increase is not obvious, this may react with it and PC molecular chains exist in the form of grafting, after lead to free volume to increase between PC molecular chains, the weakening of molecular inter-atomic forces. When the RPS - 1005 amount to 0.9%, the tensile strength of the recycled PC is highest, after more than the critical value, the tensile strength and decreased with the increase of the content instead. May be not involved in the reaction of chain extender on the material in lubrication.
RPS - 1005 PC of the impact strength of improved significantly, improve the nearly seven times, and the pure PC, its optimum adding amount at around 016%. While the impact strength of ADR - 4368 PC of increase is smaller. That type epoxy chain extender on recycled PC toughness increase more significantly. Chain extender PC glass transition temperature of thermal analysis results with the influence of the mechanical properties and rheological properties of consistent results, further confirmed that the two kinds of chain extender for regeneration effects of different extender chain of PC, but the reason it remains to be further analysis and research.
With different adding amount of RPS - 1005 chain extension modification of recycled PC DSC test, the glass transition temperature (Tg) data curve as shown in figure 4. With the increase of the content of RPS - 1005 recycled PC Tg gradually increase; But more than 019% after Tg instead begin to decline. Suggests that the right amount of chain extender can to a certain extent, improve the regeneration of PC, molecular weight reduce polymer molecular chain peristalsis ability, Tg increased; And add the chain extender can reduce Tg instead of excessive, adverse to heat resistance.
The activity of the experimental results show that different chain extender and modification effects of adding quantity of recycled PC have varying degrees of impact. ADR - 4368 mainly is to increase the tensile strength of the material, and the improvement of impact strength is not obvious; Regeneration and RPS - 1005 greatly improve the impact strength of PC, but the improvement of the tensile strength is not obvious.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Rheological study, chain extender RPS - 1005 PC of the viscosity of the increase is more obvious. DSC and TGA analysis results show that two kinds of chain extender were increased regeneration PC viscosity and heat resistance, but the content is more than a certain value on the material's thermal stability. Among them, the RPS - 1005 PC of improving the thermal stability of the effect is more prominent.
Chain extender effects on regeneration PC rheological properties. Two kinds of chain extender to join all the balance of regeneration of the PC melt torque increased to different extent, prove that the viscosity of the extender chain reaction regeneration after PC. In comparison, the chain extender ADR - 4368 no significant impact on the regeneration of the PC melt torque, the RPS - 1005 after adding amount is more than 013%, regeneration of the PC melt balance torque increased significantly. The results show that the RPS - 1005 extender chain effect is better than that of ADR - 4368.
Chain extender on the thermal performance of regenerative PC. The TGA analysis of two different chain extender and modified regenerative thermal stability of PC. Comparison shows that modified with two kinds of chain extender recycled PC increased, the thermal stability of the RPS - 1005 is better.
This research mainly through the chain extension regeneration PC on the mechanical, rheological and thermal properties before and after comparison and analysis to discuss two different types of chain extender on recycled PC extender chain effect, and looking for better add quantity, so as to improve the use of recycled PC performance.
Chain extender appearance density (g/cm3) molecular weight/MwTg/e/e thermal decomposition temperature
Testing machine; By torque rheometer sample at a certain speed and temperature of torque - time relationship, and characterization of viscosity change. Rheometer parameter Settings: set to a temperature of 250 e, the speed of 80 r/m.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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