CN101225218B - Polyester and polyamide blending modified plastic and preparation method therof - Google Patents
Polyester and polyamide blending modified plastic and preparation method therof Download PDFInfo
- Publication number
- CN101225218B CN101225218B CN2008100329047A CN200810032904A CN101225218B CN 101225218 B CN101225218 B CN 101225218B CN 2008100329047 A CN2008100329047 A CN 2008100329047A CN 200810032904 A CN200810032904 A CN 200810032904A CN 101225218 B CN101225218 B CN 101225218B
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- Prior art keywords
- ptt
- polyester
- preparation
- mah
- modified plastics
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
Abstract
The invention relates to a polyester and polyamide blend modified plastic and the preparation method; wherein the polyester and polyamide blend modified plastic comprises the PTT, the PA-6 and the PE-g-MAH; the preparation method is that (1) drying the PTT, the PA-6 and the PE-g-MAH; (2) the dried PTT, the PA-6 and the PE-g-MAH are well-mixed at the rate of 20 to 50: 80 to 50: 3 to 4 in mass; (3) the mixture is put in a double-screw extrusion equipment for extrusion pelletization after melt blending; (4) the particles are dried and the PTT/PA-6 blend modified plastic is got. The polyester and polyamide blend modified plastic has the advantages of lowed water absorption, improved mechanical stability, thereby is suitable in the engineering structure material industrial fields.
Description
Technical field
The invention belongs to polymer blended modification field, particularly relate to a kind of polyester and polyamide blended modified plastics and preparation method thereof.
Background technology
For obtaining the polymer materials of excellent combination property, except continuing development synthesizing new polymkeric substance, the blending and modifying of existing polymkeric substance has become a kind of fruitful approach of development polymer materials.
Poly(Trimethylene Terephthalate) (PTT), it is by dimethyl terephthalate (DMT) (DMT) or terephthalic acid (PTA) and 1, ammediol (1,3-PDO) polymerization and vibrin.As a kind of new polyester, PTT not only has good mechanical property, has simultaneously good crystal property, processing characteristics and extremely low water-intake rate etc. again.
Polycaprolactam (PA6), structural formula :-[NH-(CH
2)
5-CO] n-, be a kind of engineering plastics of widespread use, have good mechanical property, wear resistance, weathering resistance etc., but PA-6 has easy moisture absorption when making engineering plastics, shortcoming such as mechanics of materials poor stability after the moisture absorption.Be expected to obtain having concurrently the intermingling material of the two premium properties by melt blending, as favorable mechanical performance, lower water absorbability, mechanical stability etc. preferably.
Because the consistency of simple PTT/PA-6 co-mixing system is very poor, therefore have only and improve its consistency, could satisfy the productive life needs.Common compatibilizing method mainly contains: add chemical reaction increase-volume, the increase-volume of introducing interaction group, the increase-volume of cosolvent method, the increase-volume of IPN method in expanding material method, the mixing process.
Summary of the invention
The purpose of this invention is to provide a kind of polyester and polyamide blended modified plastics and preparation method thereof.This polyester is compared with the polycaprolactam plastics with polyamide blended modified plastics, and water-absorbent obviously reduces, and mechanical stability obviously improves, and therefore can be applicable to industrial circles such as structural timber.
Polyester of the present invention and polyamide blended modified plastics are by poly terephthalic acid-1, and ammediol ester (PTT), polycaprolactam (PA-6), polycthylene grafted maleic anhydride (PE-g-MAH) are formed.
Described poly terephthalic acid-1, ammediol ester, polycaprolactam, polycthylene grafted maleic anhydride mass ratio 20～50: 80～50: 3～4.
Described poly terephthalic acid-1, ammediol ester (PTT) intrinsic viscosity is 1.04, density is 1.35g/cm
3Polycaprolactam (PA-6) density is 1.15g/cm
3The percentage of grafting of polycthylene grafted maleic anhydride (PE-g-MAH) is 0.9%, melting index be 3.9g/10min (190 ℃ * 2.16kg).
Cardinal principle of the present invention is:
When PA-6 uses as plastic material, owing to contain strong polarity-CONH-group in the macromolecular chain, easy and H
2O forms hydrogen bond, and water-intake rate is very high, and the existence of moisture can influence its dimensional stability significantly, thereby makes the PA-6 macromole lax, influences its mechanical stability.Because the PTT water-intake rate is very low, thereby after a small amount of PTT adding, the polarity of PTT is bigger on the one hand, and the interaction of its polar group and PA-6 is strengthened, and has weakened the effect of water and PA-6, and PA-6 has been played the polarity shielding effect; In the PA-6 matrix, formed many PTT dispersion particles on the other hand, and the water-intake rate of PTT dispersion particle is lower, has blocked the infiltration of water molecules in the PA-6 matrix, has played structural shielding effect; Reduce the water-absorbent of material, and then improved the mechanical stability of material.
The preparation method of polyester of the present invention and polyamide blended modified plastics comprises the following steps:
(1) gets PTT section, PA-6 section, PE-g-MAH section, drying;
(2) (PTT, PA-6, PE-g-MAH mass ratio are 20～50: 80～50: 3～4) mix by prescription for drying is good PTT section, PA-6 section, PE-g-MAH section;
(3) section that will mix places twin screw extrusion equipment, melt blending, extruding pelletization;
(4) with the oven dry of gained particle, oven dry promptly gets PTT/PA-6 blending and modifying plastic granule.
100～120 ℃ of drying temperatures in the described step (1), 20～28 hours time, the section water ratio is less than 50ppm.
The screw speed of the twin screw extrusion equipment in the described step (3) is 20～60 rev/mins, and melt blending is 200～260 ℃ of blend 5～8 minutes.
Oven dry in the described step (4) is 100～120 ℃ of dryings 20～28 hours.
Beneficial effect of the present invention:
(1) polyester of the present invention is compared consistency with polyamide blended modified plastics and conventional polyester with polyamide blended plastics comparatively significantly raising;
(2) water-absorbent of polyester of the present invention and polyamide blended modified plastics obviously reduces than polycaprolactam plastics;
(3) mechanical stability of polyester of the present invention and polyamide blended modified plastics has clear improvement than polycaprolactam plastics.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
Get PTT, PA-6, PE-g-MAH section, be placed in the baking oven following dry 24 hours in 120 ℃.PTT, PA-6, three kinds of sections of PE-g-MAH are even by 20: 80: 4 mixed.Add from the charging opening of twin screw extruder, continue feeding by gravity, keep charging opening airtight in the blend extrusion, screw speed is controlled at 40 rev/mins.Twin screw extruder is followed successively by by feed end to six warm area temperature of head: 235 ℃, and 250 ℃, 255 ℃, 260 ℃, 260 ℃, 235 ℃.After the melt blending, extrude,, introduce the tablets press granulation through tank by head.With the gained particle be placed in the baking oven in 120 ℃ dry 24 hours down, promptly get PTT/PA-6 blending and modifying plastic granule.Molded to the blending and modifying pellet, record following 24 hours water-intake rates of room temperature and tensile strength and see Table 1; Compare with polycaprolactam, the water-intake rate of blend sample obviously reduces, and the mechanical stability under the dried hygrometric state obviously improves.
Table 1
| Performance | Dry state tensile strength (MPa) | Hygrometric state tensile strength (MPa) | The tensile strength rate of descent | Water-intake rate |
| Polycaprolactam blend sample | 73.469.2 | 45.360.3 | 38.3％12.9％ | 2.63％1.18％ |
Embodiment 2
Get PTT, PA-6, PE-g-MAH section, be placed in the baking oven following dry 24 hours in 120 ℃.PTT, PA-6, three kinds of sections of PE-g-MAH are even by 30: 70: 4 mixed.Add from the charging opening of twin screw extruder, continue feeding by gravity, keep charging opening airtight in the blend extrusion, screw speed is controlled at 40 rev/mins.Twin screw extruder is followed successively by by feed end to six warm area temperature of head: 230 ℃, and 240 ℃, 245 ℃, 235 ℃, 230 ℃, 225 ℃.After the melt blending, extrude,, introduce the tablets press granulation through tank by head.With the gained particle be placed in the baking oven in 120 ℃ dry 24 hours down, promptly get PTT/PA-6 blending and modifying plastic granule.Molded to the blending and modifying pellet, record following 24 hours water-intake rates of room temperature and tensile strength and see Table 2; Compare with polycaprolactam, the water-intake rate of blend sample obviously reduces, and the mechanical stability under the dried hygrometric state obviously improves.
Table 2
| Performance | Dry state tensile strength (MPa) | Hygrometric state tensile strength (MPa) | The tensile strength rate of descent | Water-intake rate |
| Polycaprolactam blend sample | 73.472.2 | 45.365.1 | 38.3％9.8％ | 2.63％0.55％ |
Embodiment 3
Get PTT, PA-6, PE-g-MAH section, be placed in the baking oven following dry 24 hours in 120 ℃.PTT, PA-6, three kinds of sections of PE-g-MAH are even by 50: 50: 4 mixed.Add from the charging opening of twin screw extruder, continue feeding by gravity, keep charging opening airtight in the blend extrusion, screw speed is controlled at 40 rev/mins.Twin screw extruder is followed successively by by feed end to six warm area temperature of head: 230 ℃, and 240 ℃, 245 ℃, 235 ℃, 230 ℃, 225 ℃.After the melt blending, extrude,, introduce the tablets press granulation through tank by head.With the gained particle be placed in the baking oven in 120 ℃ dry 24 hours down, promptly get PTT/PA-6 blending and modifying plastic granule.Molded to the blending and modifying pellet, record following 24 hours water-intake rates of room temperature and tensile strength and see Table 3; Compare with polycaprolactam, the water-intake rate of blend sample obviously reduces, and the mechanical stability under the dried hygrometric state obviously improves.
Table 3
| Performance | Dry state tensile strength (MPa) | Hygrometric state tensile strength (MPa) | The tensile strength rate of descent | Water-intake rate |
| Polycaprolactam blend sample | 73.443.2 | 45.341.5 | 38.3％3.9％ | 2.63％0.33％ |
Claims (5)
1. a polyester and polyamide blended modified plastics, it is characterized in that: this polyester and polyamide blended modified plastics are by poly terephthalic acid-1, ammediol ester PTT, polycaprolactam PA-6, polycthylene grafted maleic anhydride PE-g-MAH form; Wherein, poly terephthalic acid-1, the mass ratio of ammediol ester, polycaprolactam, polycthylene grafted maleic anhydride are 20～50: 80～50: 3～4.
2. the preparation method of a polyester and polyamide blended modified plastics comprises the following steps:
(1) gets poly terephthalic acid-1, ammediol ester PTT, polycaprolactam PA-6, polycthylene grafted maleic anhydride PE-g-MAH, drying;
(2) drying is good PTT, PA-6, PE-g-MAH are 20～50: 80～50 by mass ratio: 3～4 mix;
(3) mixture is placed twin screw extrusion equipment, melt blending, extruding pelletization;
(4) with the oven dry of gained particle, oven dry promptly gets PTT/PA-6 blending and modifying plastic granule.
3. the preparation method of polyester according to claim 2 and polyamide blended modified plastics is characterized in that: the drying in the described step (1) is 100～120 ℃ of dryings 20～28 hours, and the water ratio of raw material is less than 50ppm.
4. the preparation method of polyester according to claim 2 and polyamide blended modified plastics is characterized in that:
The screw speed of the twin screw extrusion equipment in the described step (3) is 20～60 rev/mins, and melt blending is 200～260 ℃ of blend 5～8 minutes.
5. the preparation method of polyester according to claim 2 and polyamide blended modified plastics is characterized in that: the oven dry in the described step (4) is 100～120 ℃ of dryings 20～28 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100329047A CN101225218B (en) | 2008-01-22 | 2008-01-22 | Polyester and polyamide blending modified plastic and preparation method therof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100329047A CN101225218B (en) | 2008-01-22 | 2008-01-22 | Polyester and polyamide blending modified plastic and preparation method therof |
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| Publication Number | Publication Date |
|---|---|
| CN101225218A CN101225218A (en) | 2008-07-23 |
| CN101225218B true CN101225218B (en) | 2011-04-27 |
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| CN2008100329047A Expired - Fee Related CN101225218B (en) | 2008-01-22 | 2008-01-22 | Polyester and polyamide blending modified plastic and preparation method therof |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087508A (en) * | 2011-11-01 | 2013-05-08 | 力鹏企业股份有限公司 | Thermoplastic elastomer composition and thermoplastic elastomer |
| CN103087509A (en) * | 2011-11-01 | 2013-05-08 | 力鹏企业股份有限公司 | Thermoplastic elastomer tire composition and thermoplastic elastomer tire material |
| CN103087507A (en) * | 2011-11-01 | 2013-05-08 | 力鹏企业股份有限公司 | Thermoplastic elastomer shoe material composition and thermoplastic elastomer shoe material |
| CN108314882B (en) * | 2018-01-24 | 2020-06-19 | 苏州赛伍应用技术股份有限公司 | Film for photovoltaic cell backboard and preparation method and use method thereof |
| CN108587154B (en) * | 2018-04-27 | 2020-10-02 | 黑龙江鑫达企业集团有限公司 | Modified PA66 composite material and preparation method thereof |
| CN113320043A (en) * | 2021-07-16 | 2021-08-31 | 江西省铭新科技有限公司 | High-strength regenerated polyamide plastic particles and preparation method thereof |
| CN113580412A (en) * | 2021-08-05 | 2021-11-02 | 安徽强茗塑业科技有限公司 | Polyester and polyamide blending modified plastic and preparation method thereof |
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Granted publication date: 20110427 Termination date: 20140122 |