News Details
Chain extender effects on mechanical properties
2017-2-22 17:44:36
Chain extender effects on mechanical properties, the experiment shows that with the increase of the content of chain extender agent ADR - 4370 tensile strength rising rapidly declined slightly after first, the content is 0.8%, the tensile strength is 29% higher than the pure PBS; The impact strength first increases, then tends to be stable.
This is due to join the appropriate chain extender to small molecule chain link, the molecular weight increased, the tensile force and impact force in the rising trend, but the excessive small molecule chain extender in the extender chain at the same time, improve the degree of negative reaction, discrete the cohesion between the molecules, the overall performance for the tensile strength decreased.
Along with the increase of the content of chain extender agent BOZ tensile strength is slightly increased, the impact strength change is not obvious, this may be due to not BOZ molecules at room temperature and the reaction of a ring BOZ residues eutectic, lead to physical tangles from happening, or BOZ since together, make its mechanical properties improved.
By comparison, chain extender ADR - 4370 and TDI can effectively improve the mechanical properties of PBS, the ADR - 4370 effect is obvious.
PLA on the mechanical behavior of PBS. PLA on the mechanical behavior of PBS. Polyolefin-g-mah/as you can see, with the PLA's joining, the tensile strength of the whole is on the rise, this is because the tensile strength of the PLA is higher, with the increase of the content of PLA blending system increased the tensile strength, therefore, the PLA's join can effectively improve the tensile strength of the PBS.
With the PLA's joining, the impact of polyolefin-g-mah/performance is on the decline. The less content of PLA, the dispersivity is good, has good compatibility with PBS, have little influence on the impact of the blending system. Increase with the content of PLA, blending system compatibility, the PLA began to affect the performance of the blend system, due to the PLA's toughness is poor, resulting in a decline in the impact strength of the polyolefin-g-mah.
The PLA's influence on PBS liquidity. The PLA's impact on PBS melt flow rate. Polyolefin-g-mah/MFR began to change, this is because a small amount of PLA scattered in the system, by PBS packages, for a little effects on the liquidity of the system; Along with the increase of the content of PLA polyolefin-g-mah/MFR drops rapidly, finally tends to be stable, it is because of the PLA's high melt viscosity, viscosity, so that the blending system when PLA content higher than 30%, their impact on the system viscosity decreases, and thus polyolefin-g-mah/MFR basically remain unchanged.
In order to get better performance of the alloy, choose chain extender ADR - 4370 modification on PBS. Polyolefin-g-mah/considering the performance of the proposed PBS: PLA = 70:30 as the basis of the formula, using two kinds of blending process: one is extender chain after blending, the other is on the capacity of blending extender chain, comparing the influence of different process of polyolefin-g-mah/performance.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Polyolefin-g-mah/chain extension modification to improve the processing performance and mechanical performance is improved, the in situ blending their capacities than extender chain extender chain after blending can improve the performance of polyolefin-g-mah/better. At the same time in the blending of chain extender, chain extender ADR - 4370 on PBS and PLA at the same time, improve the effect of the blending system modification.
(1) the chain extender was studied the changes of the performance of the modified PBS, TDI and chain extender new ADR - 4370 can effectively improve the processing properties of PBS, achieve reinforced adhesion effect, mechanical properties improved. ADR - 4370 content modification works best when 0.8%, compared with TDI, non-toxic, non-polluting, can promote the use.
(2) with the increase of PLA, PBS processing performance is improved, the tensile strength increased, but the impact strength is reduced, the comprehensive consideration, PBS/PLA optimal proportion of 70:30. (3) using extender chain blend and on-site compatibilizing blending extender chain again after two kinds of process of blending, through the performance comparison, on the expansion ratio of mixed extender chain extender chain after blending can better improve the performance of polyolefin-g-mah.
Due to the increase of the hydrophilic particles of water swelling properties make particle size increases, the swelling more obvious with the increase of hydrophilic. As a result, the relationship between the carboxyl content and particle size are the result of comprehensive factors, the overall effect is to make the latex particle size decreases with increasing the content of carboxyl group. So look from the appearance, emulsion become more transparent.
Synthesized from PTMG/MDI polyurethane elastomer many articles have been published on the morphological structure of report, and system of PTMG/MDI type casting polyurethane elastomer mechanical properties of the article is less.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
This is due to join the appropriate chain extender to small molecule chain link, the molecular weight increased, the tensile force and impact force in the rising trend, but the excessive small molecule chain extender in the extender chain at the same time, improve the degree of negative reaction, discrete the cohesion between the molecules, the overall performance for the tensile strength decreased.
Along with the increase of the content of chain extender agent BOZ tensile strength is slightly increased, the impact strength change is not obvious, this may be due to not BOZ molecules at room temperature and the reaction of a ring BOZ residues eutectic, lead to physical tangles from happening, or BOZ since together, make its mechanical properties improved.
By comparison, chain extender ADR - 4370 and TDI can effectively improve the mechanical properties of PBS, the ADR - 4370 effect is obvious.
PLA on the mechanical behavior of PBS. PLA on the mechanical behavior of PBS. Polyolefin-g-mah/as you can see, with the PLA's joining, the tensile strength of the whole is on the rise, this is because the tensile strength of the PLA is higher, with the increase of the content of PLA blending system increased the tensile strength, therefore, the PLA's join can effectively improve the tensile strength of the PBS.
With the PLA's joining, the impact of polyolefin-g-mah/performance is on the decline. The less content of PLA, the dispersivity is good, has good compatibility with PBS, have little influence on the impact of the blending system. Increase with the content of PLA, blending system compatibility, the PLA began to affect the performance of the blend system, due to the PLA's toughness is poor, resulting in a decline in the impact strength of the polyolefin-g-mah.
The PLA's influence on PBS liquidity. The PLA's impact on PBS melt flow rate. Polyolefin-g-mah/MFR began to change, this is because a small amount of PLA scattered in the system, by PBS packages, for a little effects on the liquidity of the system; Along with the increase of the content of PLA polyolefin-g-mah/MFR drops rapidly, finally tends to be stable, it is because of the PLA's high melt viscosity, viscosity, so that the blending system when PLA content higher than 30%, their impact on the system viscosity decreases, and thus polyolefin-g-mah/MFR basically remain unchanged.
In order to get better performance of the alloy, choose chain extender ADR - 4370 modification on PBS. Polyolefin-g-mah/considering the performance of the proposed PBS: PLA = 70:30 as the basis of the formula, using two kinds of blending process: one is extender chain after blending, the other is on the capacity of blending extender chain, comparing the influence of different process of polyolefin-g-mah/performance.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Polyolefin-g-mah/chain extension modification to improve the processing performance and mechanical performance is improved, the in situ blending their capacities than extender chain extender chain after blending can improve the performance of polyolefin-g-mah/better. At the same time in the blending of chain extender, chain extender ADR - 4370 on PBS and PLA at the same time, improve the effect of the blending system modification.
(1) the chain extender was studied the changes of the performance of the modified PBS, TDI and chain extender new ADR - 4370 can effectively improve the processing properties of PBS, achieve reinforced adhesion effect, mechanical properties improved. ADR - 4370 content modification works best when 0.8%, compared with TDI, non-toxic, non-polluting, can promote the use.
(2) with the increase of PLA, PBS processing performance is improved, the tensile strength increased, but the impact strength is reduced, the comprehensive consideration, PBS/PLA optimal proportion of 70:30. (3) using extender chain blend and on-site compatibilizing blending extender chain again after two kinds of process of blending, through the performance comparison, on the expansion ratio of mixed extender chain extender chain after blending can better improve the performance of polyolefin-g-mah.
Due to the increase of the hydrophilic particles of water swelling properties make particle size increases, the swelling more obvious with the increase of hydrophilic. As a result, the relationship between the carboxyl content and particle size are the result of comprehensive factors, the overall effect is to make the latex particle size decreases with increasing the content of carboxyl group. So look from the appearance, emulsion become more transparent.
Synthesized from PTMG/MDI polyurethane elastomer many articles have been published on the morphological structure of report, and system of PTMG/MDI type casting polyurethane elastomer mechanical properties of the article is less.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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