News Details
Polylactic plasticizer
2017-12-21 16:13:01
Polylactic plasticizer
Polylactic acid plasticizer polyethylene glycol (PEG) phthalate two formic acid two ester (DOP) and citric acid (TBC), three butyl phosphite three phenyl ester (TPPi) and sebacic acid butyl ester two (DBS) respectively with polylactic acid (PLA) blends, through the analysis of tensile performance test and DSC. Study on the several kinds of Polylactic Acid Plasticizer effect on tensile properties and thermal properties of PLA.
The results showed that TPPi and DBS had the best plasticizing effect in these polylactic acid plasticizers, and significantly reduced the glass transition temperature and melting temperature of PLA, and increased the elongation and crystallinity of PLA.
Poly (lactic acid) (PLA) is a kind of aliphatic polyester synthesized from natural starch. It has very good biocompatibility and degradability. Because of the PLA's crisp and poor thermal stability, its application in general plastic products is limited. At present, the toughening of PLA by plasticizer and toughening agent is more commonly used.
Next, the effects of polyethylene glycol (PEG), phthalic acid two phenyl ester (DOP), citric acid three butyl ester (TBC), phosphite three phenyl ester (TPPi) and sebacic acid two butyl ester (DBS) on the mechanical properties and thermal properties of PLA system are compared. The effect of polyethylene glycol (PEG) on the PLA system is discussed.
Raw material PLA, injection grade; PEG, analysis pure; DOP and TPPi, chemical pure; TBC, analysis pure; DBS, analysis pure.
Instrument and equipment XSS2300 type torque rheometer; XLB type plate vulcanization bed; SERIESIX type electronic tension tester; DSC27 differential scanning calorimeter.
PLA and plasticizer are fused on a torque rheometer. The melt temperature is 180, and the mixing time is 10min. The mixed material is hot pressed on the flat plate vulcanizing machine to be 200mm x 200mm x 1mm sheet, and then cut into dumbbell shaped spline with sample knife to test the tensile properties. The mixture obtained from the blending of torque rheometer and natural cooling can be directly used for DSC testing.
The tensile properties of the tensile test sheet specimens are tested by GB13022 - 91 standard, and the tensile speed is 50mm/min. The amount of 1.5 DSC samples was about 8mg, the temperature range was -40 to 200 c, the heating rate was 10 C /min, and N2 was protected.
Two octyl terephthalate (plasticizer DOTP) information:
Shipping port: Shanghai port
Price quotation validity: 15 days
Entry time: 15 days (inspection declaration)
Export authority: the company's right to import and export
Use of two octyl terephthalate (plasticizer DOTP)
1.DOTP has good electrical and thermal properties. It can be used to replace DOP in the sheath of PVC plastic wire and can also be used in the production of artificial leather membrane. In addition, with excellent compatibility, terephthalic acid ester is two PVC acrylonitrile derivatives plastic plasticizer, plasticizer, plasticizer, polyvinyl butyral nitrile rubber plasticizer, plasticizer for cellulose nitrate. The improvement of the product and plays the role of hardness and deformation, can be used as softener in NBR, chloroprene rubber, EPDM rubber and other products three. Especially for cable material, it has good plasticizing effect and low volatility. It is widely used in various products that require heat resistance and high insulation. It is an ideal plasticizer for producing 70 PVC cable material and other volatile resistant products.
2.DOTP is used for the PVC products in the car, which can solve the fog problem of the glass window. DOTP is also used for high quality lubricants or lubricant additives furniture and interior decoration paint, and precision instruments, nitro varnish additives, paper softener, biaxially oriented polyester amide membrane film, plastic bags and other crafts, plasma storage.
3. because the linear molecular structure of DOTP is similar to DOS and DOA, its cold resistance is also better.
The volume resistivity of 4.DOTP is 10-20 times higher than that of DOP, and its mobility is excellent.
5., because DOTP does not contain o-phthalate two formate, it is not an environmental friendly plasticizer in the range of 16 16 kinds of plasticizers containing o-phthalic acid in the European Union and other countries.
The mechanical properties of PEG plasticized PLA. The curves of tensile properties of PLA with different molecular weight PEG (PEG200 = 200 PEG, the same below) can be seen with the change of PEG dosage. The tensile strength decreases with the increase of PEG content. In general, the comprehensive index of the PEG6000 system is relatively high.
The PLA material itself is a rigid and rigid characteristic of high modulus, high strength and extremely low elongation (about 3%), and the fracture mode of the material is completely brittle fracture. When the 10% ~ 20% (mass fraction, the same) PEG and PLA melt blend, the material appears obvious yield phenomenon, which shows that PEG and PLA are partly compatible.
The tensile properties of poly (lactic acid) are plasticized by an ester plasticizer. The effect of 4 plasticizer dosage on PLA strength and elongation is generally similar, that is, the strength decreases with the increase of plasticizer dosage, and the elongation at break is the maximum when the plasticizer content is 15%. When the content of TBC and DOP changed from 0 to 10%, the elongation at break of PLA almost had no change or change very much, almost the same as that of pure PLA, and the tensile strength of PLA decreased slightly.
When the content of TBC and DOP changed from 10% to 15%, the tensile strength of PLA decreased significantly, while the elongation at break increased significantly, reaching the highest value at the content of 15%. While increasing the content of plasticizer, the elongation at break and tensile strength are decreasing, but the final value of elongation at break is still higher than that of the 10% system. However, when the dosage of TPPi and DBS is low, the elongation at break of PLA is obviously improved. This shows that the plasticizing efficiency of TPPi and DBS is higher than that of TBC and DOP.
Thermal performance analysis. Because of the best plasticizing effect of TPPi and DBS in several plasticizers, the effects of plasticizers on the thermal properties of PLA are discussed only by TPPi and DBS.
The glass transition, cold crystallization and melting peak of PLA are very obvious. With the increase of plasticizer addition, the glass transition peak moves below room temperature, and the melting peak shifts to low temperature, and the cold crystallization peak moves to low temperature or even disappear. The role of TPPi is more obvious. The characteristic values of plasticized PLA obtained by the DSC curve are as follows: glass transition temperature (TG), melting point (TM), crystallinity (Xc), cold crystallization enthalpy (delta Hc) and melting enthalpy (delta Hm). It can be seen that with the increase of plasticizer content, TG and TM both decrease and Xc increases, but with the increase of TPPi content, the decrease and increase of TG, TM and Xc of PLA are much higher than those of DBS. The decrease of TG and TM of PLA increased from 31.4% to about 70% from more than 20 degrees. The optimum mass fraction of PEG plasticized PLA is 10% to 15%, and the effect of PEG on the plasticizing and toughening of the relative molecular weight is better than that of 6000~10000.
When the mass fraction of DOP, TBC, TPPi and DBS4 plasticizers is about 15%, the elongation at break of plasticized PLA reaches the maximum value, and PLA exhibits ductile fracture behavior, of which TPPi and DBS have the best plasticizing effect. Both TPPi and DBS can significantly reduce the glass transition temperature of PL A, and have the effect of nucleating agent on PLA, especially TPPi can significantly accelerate PLA crystallization and increase its crystallinity.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polylactic acid plasticizer polyethylene glycol (PEG) phthalate two formic acid two ester (DOP) and citric acid (TBC), three butyl phosphite three phenyl ester (TPPi) and sebacic acid butyl ester two (DBS) respectively with polylactic acid (PLA) blends, through the analysis of tensile performance test and DSC. Study on the several kinds of Polylactic Acid Plasticizer effect on tensile properties and thermal properties of PLA.
The results showed that TPPi and DBS had the best plasticizing effect in these polylactic acid plasticizers, and significantly reduced the glass transition temperature and melting temperature of PLA, and increased the elongation and crystallinity of PLA.
Poly (lactic acid) (PLA) is a kind of aliphatic polyester synthesized from natural starch. It has very good biocompatibility and degradability. Because of the PLA's crisp and poor thermal stability, its application in general plastic products is limited. At present, the toughening of PLA by plasticizer and toughening agent is more commonly used.
Next, the effects of polyethylene glycol (PEG), phthalic acid two phenyl ester (DOP), citric acid three butyl ester (TBC), phosphite three phenyl ester (TPPi) and sebacic acid two butyl ester (DBS) on the mechanical properties and thermal properties of PLA system are compared. The effect of polyethylene glycol (PEG) on the PLA system is discussed.
Raw material PLA, injection grade; PEG, analysis pure; DOP and TPPi, chemical pure; TBC, analysis pure; DBS, analysis pure.
Instrument and equipment XSS2300 type torque rheometer; XLB type plate vulcanization bed; SERIESIX type electronic tension tester; DSC27 differential scanning calorimeter.
PLA and plasticizer are fused on a torque rheometer. The melt temperature is 180, and the mixing time is 10min. The mixed material is hot pressed on the flat plate vulcanizing machine to be 200mm x 200mm x 1mm sheet, and then cut into dumbbell shaped spline with sample knife to test the tensile properties. The mixture obtained from the blending of torque rheometer and natural cooling can be directly used for DSC testing.
The tensile properties of the tensile test sheet specimens are tested by GB13022 - 91 standard, and the tensile speed is 50mm/min. The amount of 1.5 DSC samples was about 8mg, the temperature range was -40 to 200 c, the heating rate was 10 C /min, and N2 was protected.
Two octyl terephthalate (plasticizer DOTP) information:
Shipping port: Shanghai port
Price quotation validity: 15 days
Entry time: 15 days (inspection declaration)
Export authority: the company's right to import and export
Use of two octyl terephthalate (plasticizer DOTP)
1.DOTP has good electrical and thermal properties. It can be used to replace DOP in the sheath of PVC plastic wire and can also be used in the production of artificial leather membrane. In addition, with excellent compatibility, terephthalic acid ester is two PVC acrylonitrile derivatives plastic plasticizer, plasticizer, plasticizer, polyvinyl butyral nitrile rubber plasticizer, plasticizer for cellulose nitrate. The improvement of the product and plays the role of hardness and deformation, can be used as softener in NBR, chloroprene rubber, EPDM rubber and other products three. Especially for cable material, it has good plasticizing effect and low volatility. It is widely used in various products that require heat resistance and high insulation. It is an ideal plasticizer for producing 70 PVC cable material and other volatile resistant products.
2.DOTP is used for the PVC products in the car, which can solve the fog problem of the glass window. DOTP is also used for high quality lubricants or lubricant additives furniture and interior decoration paint, and precision instruments, nitro varnish additives, paper softener, biaxially oriented polyester amide membrane film, plastic bags and other crafts, plasma storage.
3. because the linear molecular structure of DOTP is similar to DOS and DOA, its cold resistance is also better.
The volume resistivity of 4.DOTP is 10-20 times higher than that of DOP, and its mobility is excellent.
5., because DOTP does not contain o-phthalate two formate, it is not an environmental friendly plasticizer in the range of 16 16 kinds of plasticizers containing o-phthalic acid in the European Union and other countries.
The mechanical properties of PEG plasticized PLA. The curves of tensile properties of PLA with different molecular weight PEG (PEG200 = 200 PEG, the same below) can be seen with the change of PEG dosage. The tensile strength decreases with the increase of PEG content. In general, the comprehensive index of the PEG6000 system is relatively high.
The PLA material itself is a rigid and rigid characteristic of high modulus, high strength and extremely low elongation (about 3%), and the fracture mode of the material is completely brittle fracture. When the 10% ~ 20% (mass fraction, the same) PEG and PLA melt blend, the material appears obvious yield phenomenon, which shows that PEG and PLA are partly compatible.
The tensile properties of poly (lactic acid) are plasticized by an ester plasticizer. The effect of 4 plasticizer dosage on PLA strength and elongation is generally similar, that is, the strength decreases with the increase of plasticizer dosage, and the elongation at break is the maximum when the plasticizer content is 15%. When the content of TBC and DOP changed from 0 to 10%, the elongation at break of PLA almost had no change or change very much, almost the same as that of pure PLA, and the tensile strength of PLA decreased slightly.
When the content of TBC and DOP changed from 10% to 15%, the tensile strength of PLA decreased significantly, while the elongation at break increased significantly, reaching the highest value at the content of 15%. While increasing the content of plasticizer, the elongation at break and tensile strength are decreasing, but the final value of elongation at break is still higher than that of the 10% system. However, when the dosage of TPPi and DBS is low, the elongation at break of PLA is obviously improved. This shows that the plasticizing efficiency of TPPi and DBS is higher than that of TBC and DOP.
Thermal performance analysis. Because of the best plasticizing effect of TPPi and DBS in several plasticizers, the effects of plasticizers on the thermal properties of PLA are discussed only by TPPi and DBS.
The glass transition, cold crystallization and melting peak of PLA are very obvious. With the increase of plasticizer addition, the glass transition peak moves below room temperature, and the melting peak shifts to low temperature, and the cold crystallization peak moves to low temperature or even disappear. The role of TPPi is more obvious. The characteristic values of plasticized PLA obtained by the DSC curve are as follows: glass transition temperature (TG), melting point (TM), crystallinity (Xc), cold crystallization enthalpy (delta Hc) and melting enthalpy (delta Hm). It can be seen that with the increase of plasticizer content, TG and TM both decrease and Xc increases, but with the increase of TPPi content, the decrease and increase of TG, TM and Xc of PLA are much higher than those of DBS. The decrease of TG and TM of PLA increased from 31.4% to about 70% from more than 20 degrees. The optimum mass fraction of PEG plasticized PLA is 10% to 15%, and the effect of PEG on the plasticizing and toughening of the relative molecular weight is better than that of 6000~10000.
When the mass fraction of DOP, TBC, TPPi and DBS4 plasticizers is about 15%, the elongation at break of plasticized PLA reaches the maximum value, and PLA exhibits ductile fracture behavior, of which TPPi and DBS have the best plasticizing effect. Both TPPi and DBS can significantly reduce the glass transition temperature of PL A, and have the effect of nucleating agent on PLA, especially TPPi can significantly accelerate PLA crystallization and increase its crystallinity.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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