CN104341730A - High toughness PBT (polybutylene terephthalate)/PET (polyethylene terephthalate) alloy and preparation method - Google Patents
High toughness PBT (polybutylene terephthalate)/PET (polyethylene terephthalate) alloy and preparation method Download PDFInfo
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- CN104341730A CN104341730A CN201310324709.2A CN201310324709A CN104341730A CN 104341730 A CN104341730 A CN 104341730A CN 201310324709 A CN201310324709 A CN 201310324709A CN 104341730 A CN104341730 A CN 104341730A
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Abstract
The invention discloses a high toughness PBT (polybutylene terephthalate)/PET (polyethylene terephthalate) alloy and a preparation method. The high toughness PBT/PET alloy comprises the following components by mass: 20%-60% of PBT, 20%-60% of PET, 15%-20% of a toughening agent, 0.1%-1% of a chain extender, 0.1%-1% of a compound nucleating agent, 1%-3% of an anti hydrolysis agent, 0.5%-2% of a lubricant and 0.1%-1% of an antioxidant. The beneficial effect of the high toughness PBT/PET alloy is in that, compared with the existing technology, the prepared PBT/PET alloy not only has the respective advantages of PBT and PET, makes up for the defects of single component performance, and is low in cost, the obtained product is low in shrinkage rate and good in heat resistance and impact toughness, the impact strength is up to 900J/m, and the cost is reduced. The preparation method of the PBT/PET alloy is simple and easy to operate.
Description
Technical field
The present invention relates to technical field of polymer materials, specifically a kind of high tenacity PBT/PET Alloy And Preparation Method.
Background technology
Polybutylene terephthalate (PBT) is a kind of engineering plastics developed rapidly in the 70's of 20th century, it has good over-all properties and heat-resisting fatigue performance, and crystallization velocity is fast, can crystallization rapidly under low temperature, good forming ability, be widely used in automobile, mechanical means, electric production, and become a member important in five large-engineering plastics.But PBT notched Izod impact strength is low, and molding shrinkage is large.
Polyethylene terephthalate (PET) is cheap and have the characteristics such as excellent thermotolerance, chemical proofing, electrical insulating property and mechanical property, is the engineering plastics that cost performance is higher.But PET fragility is comparatively large, and notch shock performance is poor, crystallization rate is slow, and application is restricted.
The consistency of research PBT/PET co-mixing system, the chemical structure of PBT and PET is similar, and therefore consistency is fine.By blended for PBT and PET can comprehensive both performance, learn from other's strong points to offset one's weaknesses, but also can reduce costs.But PBT/PET blend uses as engineering plastics, disadvantage is that notch sensitivity is strong, and notched Izod impact strength is low, significantly limit its application.Therefore, be necessary to carry out toughening modifying to PBT/PET alloy.
Summary of the invention
The object of the present invention is to provide a kind of high tenacity PBT/PET Alloy And Preparation Method.
The technical solution adopted for the present invention to solve the technical problems is: high tenacity PBT/PET alloy, and its component by mass percent proportioning is: PBT 20% ~ 60%, PET 20% ~ 60%, toughner 15% ~ 20%, chainextender 0.1% ~ 1%, composite nucleating agent 0.1% ~ 1%, hydrolysis-resisting agent 1% ~ 3%, lubricant 0.5% ~ 2%, oxidation inhibitor 0.1% ~ 1%.
Described PBT is polybutylene terephthalate, its intrinsic viscosity 0.8 ~ 1.0dL/g.
Described PET is polyethylene terephthalate, its intrinsic viscosity 0.9 ~ 1.05dL/g.
Described toughner is the one in maleic anhydride grafted ethene-octene copolymer (POE-g-MAH), glycidyl methacrylate graft ethylene-octene copolymer (POE-g-GMA), glycidyl methacrylate graft polystyrene (PS-g-GMA), maleic anhydride grafted ethene-vinyl acetate copolymer (EVA-g-MAH).
Described chainextender is pyromellitic dianhydride (PMDA) or triphenyl phosphite (TPPi).
Described composite nucleating agent is the compound of Sodium Benzoate and ethylene-methyl methacrylate sodium ion polymkeric substance.
Described hydrolysis-resisting agent is carbodiimide.
Described lubricant is TAS-2A or ethylene bis stearic amide (EBS).
Described oxidation inhibitor is the compound of hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168.
The preparation method of above-mentioned high tenacity PBT/PET alloy, comprise the following steps: take each component by weight ratio, add in high-speed mixer and stir 5 ~ 30 minutes, make fully to mix, add again in twin screw extruder, at 210 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product.
The invention has the beneficial effects as follows, compared with prior art, the PBT/PET alloy that the present invention obtains not only has PBT and PET advantage separately, compensate for the defect in one-component performance, cost is low, and the shrinking percentage of resulting product is low, thermotolerance and impelling strength good, shock strength reaches as high as 900J/m, can reduce costs simultaneously.Simple and the easy handling of the preparation method of high tenacity PBT/PET alloy provided by the invention.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.
Embodiment 1:
A kind of high tenacity PBT/PET alloy, its component by mass percent proportioning is: the compound 0.7% of the compound 1% of PBT 40%, PET 36%, maleic anhydride grafted ethene-octene copolymer (POE-g-MAH) 18%, pyromellitic dianhydride (PMDA) 0.8%, Sodium Benzoate and ethylene-methyl methacrylate sodium ion polymkeric substance, carbodiimide 2%, TAS-2A 1.5%, hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168.Wherein, described PBT is polybutylene terephthalate, its intrinsic viscosity 0.8 ~ 1.0dL/g; Described PET is polyethylene terephthalate, its intrinsic viscosity 0.9 ~ 1.05dL/g.
Preparation method: take each component by weight ratio, adds in high-speed mixer and stirs 5 ~ 30 minutes, make fully to mix, then add in twin screw extruder, and at 210 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product.
Embodiment 2:
A kind of high tenacity PBT/PET alloy, its component by mass percent proportioning is: the compound 0.9% of the compound 1% of PBT 39%, PET 39%, glycidyl methacrylate graft ethylene-octene copolymer (POE-g-GMA) 15%, triphenyl phosphite (TPPi) 0.6%, Sodium Benzoate and ethylene-methyl methacrylate sodium ion polymkeric substance, carbodiimide 3%, ethylene bis stearic amide (EBS) 1.5%, hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168.Wherein, described PBT is polybutylene terephthalate, its intrinsic viscosity 0.8 ~ 1.0dL/g; Described PET is polyethylene terephthalate, its intrinsic viscosity 0.9 ~ 1.05dL/g.
Preparation method: take each component by weight ratio, adds in high-speed mixer and stirs 5 ~ 30 minutes, make fully to mix, then add in twin screw extruder, and at 210 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product.
Claims (8)
1. a high tenacity PBT/PET alloy, it is characterized in that, its component by mass percent proportioning is: PBT 20% ~ 60%, PET 20% ~ 60%, toughner 15% ~ 20%, chainextender 0.1% ~ 1%, composite nucleating agent 0.1% ~ 1%, hydrolysis-resisting agent 1% ~ 3%, lubricant 0.5% ~ 2%, oxidation inhibitor 0.1% ~ 1%.
2. high tenacity PBT/PET alloy according to claim 1, is characterized in that, described PBT is polybutylene terephthalate, its intrinsic viscosity 0.8 ~ 1.0dL/g.
3. high tenacity PBT/PET alloy according to claim 1, is characterized in that, described PET is polyethylene terephthalate, its intrinsic viscosity 0.9 ~ 1.05dL/g.
4. high tenacity PBT/PET alloy according to claim 1, it is characterized in that, described toughner is the one in maleic anhydride grafted ethene-octene copolymer (POE-g-MAH), glycidyl methacrylate graft ethylene-octene copolymer (POE-g-GMA), glycidyl methacrylate graft polystyrene (PS-g-GMA), maleic anhydride grafted ethene-vinyl acetate copolymer (EVA-g-MAH).
5. high tenacity PBT/PET alloy according to claim 1, is characterized in that, described chainextender is pyromellitic dianhydride (PMDA) or triphenyl phosphite (TPPi).
6. high tenacity PBT/PET alloy according to claim 1, is characterized in that, described composite nucleating agent is the compound of Sodium Benzoate and ethylene-methyl methacrylate sodium ion polymkeric substance.
7. high tenacity PBT/PET alloy according to claim 1, is characterized in that, described hydrolysis-resisting agent is carbodiimide.
8. the preparation method of high tenacity PBT/PET alloy according to claim 1, it is characterized in that, comprise the following steps: take each component by weight ratio, add in high-speed mixer and stir 5 ~ 30 minutes, make fully to mix, add in twin screw extruder, at 210 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310324709.2A CN104341730A (en) | 2013-07-30 | 2013-07-30 | High toughness PBT (polybutylene terephthalate)/PET (polyethylene terephthalate) alloy and preparation method |
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| CN201310324709.2A CN104341730A (en) | 2013-07-30 | 2013-07-30 | High toughness PBT (polybutylene terephthalate)/PET (polyethylene terephthalate) alloy and preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778443A (en) * | 2016-05-04 | 2016-07-20 | 无锡市嘉邦电力管道厂 | High-toughness corrosion-resistant PBT (Polybutylene Terephthalate)/PET (Polyethylene Terephthalate) alloy and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778443A (en) * | 2016-05-04 | 2016-07-20 | 无锡市嘉邦电力管道厂 | High-toughness corrosion-resistant PBT (Polybutylene Terephthalate)/PET (Polyethylene Terephthalate) alloy and preparation method thereof |
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Application publication date: 20150211 |