News Details
Plastic chain extender
2017-2-22 17:43:30
Plastic chain extender, thermoplastic aliphatic polyester poly butyl diacid butyl glycol ester (PBS) has good biological compatibility and biological absorbability, in use process performance is stable, can use after such as compost, soil, water and activated sludge environment is broken down by microorganisms or animal and plant enzymes in the body, the end products for carbon dioxide and water.
PBS is good full biodegradable material, but because of the low molecular weight, low characteristic viscosity.methods, melt flow rate is high, in the actual process is not easy to use process such as extrusion and blowing molding processing, greatly hindered the application of it. Due to containing end hydroxyl and end carboxyl, can find a suitable small molecule chain extender chain extension modification, in order to increase the molecular weight and improve the viscosity.
Currently used chain extender on the polyester chain extender with epoxy, isocyanate and acid anhydride, etc. USES the new type of chain extender ADR - 4370 on PBS chain extension, 9 of each ADR - 4370 molecular reactive epoxy group, can and the reaction of the thermoplastic engineering plastics group (hydroxyl, carboxyl, amino, sulfide) linking reaction, improve its viscosity, so as to improve its mechanical properties, etc.
PBS softness is strong, but the tensile strength and modulus are relatively low, so need to take the method of blending the modification, is to some extent compensate for single-component full biodegradable material defects, and shall not affect the degradation of material properties.
Polylactic acid (PLA) is a kind of excellent biocompatibility and biodegradability of synthetic polymer materials, has high modulus and tensile strength, but low elongation at break, poor toughness. Through the PBS/PLA blend, choose the best matching, improves performance of the PBS. Using two kinds of technology blending with chain extension: after PBS and PLA blending; At the same time in the blending of in-place compatibilizing modified extender chain.
With the increase of the content of chain extender agent ADR - 4370 MFR of PBS system gradually reduce, balance torque increases, and gradually stabilized. This is due to the ADR - 4370 with PBS carboxyl of linking reaction, PBS molecular weight increase, the system viscosity; But with the increase of chain extender, carboxyl content gradually reduce, until completely reaction, maximum system viscosity, then continue to join the chain extender little impact on the system viscosity.
With the increase of the content of chain extender TDI system MFR falling rapidly, balance torque increases, that the addition of TDI can effectively promote the link reaction, improve the PBS molecular weight, viscosity increasing system.
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
With the increase of the content of chain extender agent BOZ system of MFR rise rapidly, balance torque reduction. This may be due to the machining process, the reaction temperature is lower than BOZ optimal reactive temperature, chain extension reaction did not occur, small molecule BOZ plasticizing effect instead, cause the system viscosity reduced rapidly. Also may be only a BOZ ring with carboxyl reaction, consumes carboxyl, but has no contribution extender chain.
By comparison, chain extender ADR - 4370 and TDI in the case of continuous processing, can better improve the PBS the defects of low molecular weight and viscosity.
Chain extender for polyurethane elastomer for in-depth research the influence of performance, the chain extender polyurethane elastomer mechanical performance adjustment is a common method of polyurethane industry. Butyl hydroxy propellant is a kind of stuffed with ammonium perchlorate (AP), aluminum (Al) packing polyurethane elastomer, such as the application of chain extender is bound to the regulation of mechanical properties for its provides an effective method.
As chain extender is generally contain two functional groups active hydrogen substances, it will react with butyl hydroxy propellant of curing agent diisocyanate, so it is butyl hydroxy propellant is an important component in the curing system.
The experiment with the propellant main components: the AP is 69.5%; Al is 17.0%; Sebacate diisooctyl (DOS) is 3.3%; "HTPB + IPDI + chain extender CE" is 9.54%; The other 0.66%. These components of HTPB and IPDI, CE ratio according to the different solidification parameters RrI and chain extender species adjust to change.
Due to the increase of the hydrophilic particles of water swelling also can make the particle size increases significantly. When DMPA content is low, therefore, content of hydrophilic group increase cause hydrophilicity enhanced particle size is the major factor, the emulsion viscosity change is not obvious, but when the DMPA content is higher, with the increase of content of hydrophilic group, electric double layer thickness increases and water swelling factors dominate, emulsion viscosity increases significantly.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
PBS is good full biodegradable material, but because of the low molecular weight, low characteristic viscosity.methods, melt flow rate is high, in the actual process is not easy to use process such as extrusion and blowing molding processing, greatly hindered the application of it. Due to containing end hydroxyl and end carboxyl, can find a suitable small molecule chain extender chain extension modification, in order to increase the molecular weight and improve the viscosity.
Currently used chain extender on the polyester chain extender with epoxy, isocyanate and acid anhydride, etc. USES the new type of chain extender ADR - 4370 on PBS chain extension, 9 of each ADR - 4370 molecular reactive epoxy group, can and the reaction of the thermoplastic engineering plastics group (hydroxyl, carboxyl, amino, sulfide) linking reaction, improve its viscosity, so as to improve its mechanical properties, etc.
PBS softness is strong, but the tensile strength and modulus are relatively low, so need to take the method of blending the modification, is to some extent compensate for single-component full biodegradable material defects, and shall not affect the degradation of material properties.
Polylactic acid (PLA) is a kind of excellent biocompatibility and biodegradability of synthetic polymer materials, has high modulus and tensile strength, but low elongation at break, poor toughness. Through the PBS/PLA blend, choose the best matching, improves performance of the PBS. Using two kinds of technology blending with chain extension: after PBS and PLA blending; At the same time in the blending of in-place compatibilizing modified extender chain.
With the increase of the content of chain extender agent ADR - 4370 MFR of PBS system gradually reduce, balance torque increases, and gradually stabilized. This is due to the ADR - 4370 with PBS carboxyl of linking reaction, PBS molecular weight increase, the system viscosity; But with the increase of chain extender, carboxyl content gradually reduce, until completely reaction, maximum system viscosity, then continue to join the chain extender little impact on the system viscosity.
With the increase of the content of chain extender TDI system MFR falling rapidly, balance torque increases, that the addition of TDI can effectively promote the link reaction, improve the PBS molecular weight, viscosity increasing system.
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
With the increase of the content of chain extender agent BOZ system of MFR rise rapidly, balance torque reduction. This may be due to the machining process, the reaction temperature is lower than BOZ optimal reactive temperature, chain extension reaction did not occur, small molecule BOZ plasticizing effect instead, cause the system viscosity reduced rapidly. Also may be only a BOZ ring with carboxyl reaction, consumes carboxyl, but has no contribution extender chain.
By comparison, chain extender ADR - 4370 and TDI in the case of continuous processing, can better improve the PBS the defects of low molecular weight and viscosity.
Chain extender for polyurethane elastomer for in-depth research the influence of performance, the chain extender polyurethane elastomer mechanical performance adjustment is a common method of polyurethane industry. Butyl hydroxy propellant is a kind of stuffed with ammonium perchlorate (AP), aluminum (Al) packing polyurethane elastomer, such as the application of chain extender is bound to the regulation of mechanical properties for its provides an effective method.
As chain extender is generally contain two functional groups active hydrogen substances, it will react with butyl hydroxy propellant of curing agent diisocyanate, so it is butyl hydroxy propellant is an important component in the curing system.
The experiment with the propellant main components: the AP is 69.5%; Al is 17.0%; Sebacate diisooctyl (DOS) is 3.3%; "HTPB + IPDI + chain extender CE" is 9.54%; The other 0.66%. These components of HTPB and IPDI, CE ratio according to the different solidification parameters RrI and chain extender species adjust to change.
Due to the increase of the hydrophilic particles of water swelling also can make the particle size increases significantly. When DMPA content is low, therefore, content of hydrophilic group increase cause hydrophilicity enhanced particle size is the major factor, the emulsion viscosity change is not obvious, but when the DMPA content is higher, with the increase of content of hydrophilic group, electric double layer thickness increases and water swelling factors dominate, emulsion viscosity increases significantly.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian