CN105176035A - Nylon powder / poly propylene carbonate composite material and preparation method thereof - Google Patents
Nylon powder / poly propylene carbonate composite material and preparation method thereof Download PDFInfo
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- CN105176035A CN105176035A CN201510485502.2A CN201510485502A CN105176035A CN 105176035 A CN105176035 A CN 105176035A CN 201510485502 A CN201510485502 A CN 201510485502A CN 105176035 A CN105176035 A CN 105176035A
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Abstract
The present invention provides a nylon powder and poly propylene carbonate composite material, which comprises nylon powder and poly propylene carbonate in the mass ratio of 0.1-4:100. The composite powder is prepared from blending nylon powder and poly propylene carbonate by solution blending or melt blending method. The composite material provided by the present invention has good performance, and uses cheap and easily available raw materials; and the preparation process is simple and easy to implement.
Description
Technical field
The invention belongs to technical field of composite materials, be specifically related to a kind of nylon powder/polypropylene carbonate composite material and preparation method thereof.
Background technology
Poly (propylene carbonate) (PPC) is the alternating copolymer of carbonic acid gas and propylene oxide, there is because of it many excellent performances such as biodegradability, biocompatibility, high-clarity, snappiness and barrier properties for gases, make its prospect that is widely used in the field such as field of medicaments and wrapping material.In addition, in poly (propylene carbonate) preparation process, effectively GHG carbon dioxide is secured.Therefore, poly (propylene carbonate) receives much concern in recent years.But glass transition temperature of poly (propylene carbonate) is low, thermostability and mechanical strength poor, strongly limit its mass-producing application.
For improving the performance of poly (propylene carbonate), in external, in succession carry out the study on the modification of poly (propylene carbonate).Wherein, physical blending is one of effective way improving poly (propylene carbonate) performance, and this method is simple to equipment requirements, easy to operate, thus obtains and studies widely.Poly (propylene carbonate) and natural macromolecular are as compounds such as chitosan, ramie, starch, Mierocrystalline cellulose and xylogen, as blended in polystyrene, polyvinyl alcohol, poly(lactic acid) and poly butylene succinate etc. with the macromolecular material of synthetic, with inorganic materials as glass fibre, nano-calcium carbonate, polynite, rectorite leng, Nano-meter SiO_2
2, carbon nanotube and graphite oxide etc. carry out composite etc. all has bibliographical information.These work performance that improve poly (propylene carbonate) all in various degree.Generally, just good modified effect can be played when modified component adds many.As the reports such as Chen adopt glass fibre to carry out blending and modifying (JournalofReinforcedPlasticsandComposites to poly (propylene carbonate), 2010,29 (10): 1545-1550.), add the glass fibre of 10%, the tensile strength of gained matrix material improves 25.43MPa from 17.32MPa, maximum heat decomposition temperature improves 293.2 DEG C from 290.8 DEG C, but elongation at break but significantly have decreased to 8.86% from 255.03%.Chinese patent CN104327477A discloses poly (propylene carbonate)/cellulose composite material and preparation method thereof, when Mierocrystalline cellulose amount ratio is more, just there is good modified effect, such as, 60g wood pulp cellulose and 40g poly (propylene carbonate) blended, the second-order transition temperature of gained matrix material is 48 DEG C from 32 DEG C, its tensile strength improves 34MPa from 19MPa, and with the wood pulp cellulose of 5g and 95g poly (propylene carbonate) blended, the second-order transition temperature of gained matrix material is only 34 DEG C, and tensile strength is 24MPa.Chinese patent CN103540113A discloses the method that calcium carbonate filling modification improves poly (propylene carbonate) mechanical property, and effect is similar.Gao etc. adopt nanoscale graphite to carry out modification (JournalofMaterialsChemistry to poly (propylene carbonate), 2011,21,17627 – 17630.), add the mechanical property that a small amount of nanoscale graphite just can significantly improve poly (propylene carbonate).But these fillers are expensive, thus limit promoting the use of of this kind of matrix material.
Nylon powder and polyamide powder are a kind of common powder body materials.Nylon powder maintains the excellent properties of original nylon, there is the premium propertiess such as good mechanical property, wear resistance, self-lubricating, oil resistant, electrical insulating property be good, and it is nonpoisonous and tasteless, be widely used in the fields such as powder coating, tamanori, medicine, makeup, become a kind of very promising macromolecular material.But, nylon powder is used as macromolecular material weighting agent thus modification rarely seen report is carried out to macromolecular material.
Summary of the invention
Based on this, the object of the invention is to provide a kind of nylon powder/polypropylene carbonate composite material and preparation method thereof.
Nylon powder/polypropylene carbonate composite material provided by the present invention is made up of nylon powder and poly (propylene carbonate) (PPC), and wherein, the mass ratio of nylon powder and poly (propylene carbonate) is 0.1 ~ 4:100.
The number-average molecular weight of described poly (propylene carbonate) is 1.5 × 10
4~ 3 × 10
5, molecular weight distribution is 1.3 ~ 7.5.
Described nylon powder can be any one or two or more mixtures in nylon 3, nylon 6, nylon66 fiber, nylon 46, nylon 1010, nylon 11 and nylon 12.
The granularity of described nylon powder is more than 200 orders.
A kind of preparation method of above-mentioned nylon powder/polypropylene carbonate composite material, it adopts the method for solution blending to obtain, be specially: poly (propylene carbonate) is dissolved in appropriate solvent and obtains solution a, nylon powder is scattered in appropriate solvent and obtains solution b, then by admixed together for solution a and solution b, be stirred to solvent evaporates (about needing 4 ~ 12h), drying at room temperature 8 ~ 16h, then vacuum-drying 24 ~ 48h.
Concrete, described solvent is one or more the mixture in methylene dichloride, trichloromethane, acetone, tetrahydrofuran (THF), ethyl acetate and dioxane.The addition of solvent thinks that 5 ~ 15 times of poly (propylene carbonate)/nylon powder weight are advisable.
The another kind of preparation method of above-mentioned nylon powder/polypropylene carbonate composite material, also the method for melt blending can be adopted to obtain, be specially: get poly (propylene carbonate) and nylon powder in proportion, be then placed in mixing equipment in 130 ~ 180 DEG C of melt blending 5 ~ 30min, cool and obtain product.Also as required, gained matrix material can be pressed into sheet material further.
Concrete, melt blending mixing equipment used is Banbury mixer, single screw extrusion machine or twin screw extruder etc.
Matrix material provided by the present invention has excellent performance, and the performance of the performance index such as thermal characteristics and mechanical property is excellent.Preparation method is simple, effective, good economy performance.Concrete embodiment can be obtained from the following aspects:
1) gained matrix material has excellent thermal characteristics and mechanical property, and filler controls just can reach reasonable modified effect when less consumption;
2) nylon powder is cheap and easy to get;
3) nylon powder/PPC matrix material adopts the mode of solution blending or melt blending to prepare, and blending method is low for equipment requirements, simple to operate, is convenient to implement.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited thereto.
nylon powder/polypropylene carbonate composite material >
Nylon powder/polypropylene carbonate composite material provided by the present invention adopts nylon powder to carry out blending and modifying as properties-correcting agent to poly (propylene carbonate).The mass ratio of described nylon powder and poly (propylene carbonate) is 0.1 ~ 4:100, preferably uses 0.1 ~ 2:100.
The number-average molecular weight of poly (propylene carbonate) selected by the present invention is 1.5 × 10
4~ 3 × 10
5, molecular weight distribution is 1.3 ~ 7.5.Be preferably 2 × 10 by number-average molecular weight
4~ 2.5 × 10
5, component is distributed as 1.5 ~ 4.5.
Nylon powder order number selected by the present invention requires more than 200 orders, and as preferably, the order number of nylon powder is between 400 ~ 1000.
Nylon powder selected by the present invention is any one or two or more mixtures in nylon 3, nylon 6, nylon66 fiber, nylon 46, nylon 1010, nylon 11 and nylon 12.Preferably, nylon powder of the present invention is selected from nylon 3, nylon 6, nylon66 fiber and nylon 46.
preparation method >
The preparation method of nylon powder/polypropylene carbonate composite material provided by the present invention comprises solution blending and melt blending.As preferably, the present invention preferentially selects the method for melt blending.
The temperature of described melt blending is 130 ~ 180 DEG C, and preferred molten blending temperature is 150 ~ 170 DEG C, and the melt blending time is 5 ~ 30min, and the preferred blended time is 8 ~ 20min.
embodiment 1-8
By 50g poly (propylene carbonate), (PPC, number-average molecular weight is 2.2 × 10
4, molecular weight distributing index 3.8) and the nylon powder of Different adding amount in Banbury mixer under certain temperature melt blending certain hour, cooling, obtains nylon powder/polypropylene carbonate composite material product.The processing parameters such as concrete nylon powder kind, nylon powder and PPC mass ratio in embodiment 1 to 8, melt blending temperature and blended time refer to table 1.
comparative example 1 and 2
By 50g poly (propylene carbonate), (PPC, number-average molecular weight is 2.2 × 10
4, molecular weight distributing index 3.8) respectively with nylon 3 powder of 0.025g, 3g in Banbury mixer in 180 DEG C of melt blending 10min, cooling, obtains nylon powder/polypropylene carbonate composite material product.Concrete visible table 1.
Each processing parameter in table 1, different embodiment
< testing method >
Above-described embodiment 1 to 8 and comparative example 1,2 gained matrix material are hot pressed into the film of 1mm left and right thickness respectively on vulcanizer in 100 DEG C.Gained film is carried out the test of differential scanning calorimeter, thermogravimetric analyzer and static stretch.The results are shown in Table 2.
The test condition of differential scanning calorimeter is: adopt Mettler-ToledoDSC822e differential scanning calorimeter to test.First at 70 DEG C of constant temperature 5min, eliminate thermal history, fast cooling, to-30 DEG C, is then warming up to 70 DEG C with the temperature rise rate of 20 DEG C/min, record second-order transition temperature.
The test condition of thermogravimetric analyzer is: adopt Mettler-ToledoTGA/SDTA851e thermogravimetric analyzer to test.Atmosphere is nitrogen, and temperature rise rate is 10 DEG C/min, and scanning temperature range is 25 DEG C ~ 550 DEG C.
Static stretch experiment is tested according to ASTM standard, and rate of extension is 50mm/min.Instronl185 instrument is adopted to test.
The test result of table 2, different embodiment gained matrix material
As can be seen from Table 2: add the performance that a small amount of nylon powder filler just can improve poly (propylene carbonate) preferably.And due to nylon powder consumption less, gained matrix material also has reasonable light transmission, can be used as wrapping material use.
Claims (8)
1. nylon powder/polypropylene carbonate composite material, is characterized in that, this matrix material is made up of nylon powder and poly (propylene carbonate), and wherein, the mass ratio of nylon powder and poly (propylene carbonate) is 0.1 ~ 4:100.
2. nylon powder/polypropylene carbonate composite material according to claim 1, is characterized in that: the number-average molecular weight of described poly (propylene carbonate) is 1.5 × 10
4~ 3 × 10
5, molecular weight distribution is 1.3 ~ 7.5.
3. nylon powder/polypropylene carbonate composite material according to claim 1, is characterized in that, described nylon powder is one or more the mixture in nylon 3, nylon 6, nylon66 fiber, nylon 46, nylon 1010, nylon 11 and nylon 12.
4. nylon powder/polypropylene carbonate composite material according to claim 1, is characterized in that, the granularity of described nylon powder is more than 200 orders.
5. the preparation method of the arbitrary described nylon powder/polypropylene carbonate composite material of Claims 1-4, it is characterized in that, the method of solution blending is adopted to obtain, be specially: poly (propylene carbonate) is dissolved in appropriate solvent and obtains solution a, nylon powder is scattered in appropriate solvent and obtains solution b, then by admixed together for solution a and solution b, be stirred to solvent evaporates, drying at room temperature 8 ~ 16h, then vacuum-drying 24 ~ 48h.
6. the preparation method of nylon powder/polypropylene carbonate composite material according to claim 5, it is characterized in that, described solvent is one or more the mixture in methylene dichloride, trichloromethane, acetone, tetrahydrofuran (THF), ethyl acetate and dioxane.
7. the preparation method of the arbitrary described nylon powder/polypropylene carbonate composite material of Claims 1-4, it is characterized in that, the method of melt blending is adopted to obtain, be specially: get poly (propylene carbonate) and nylon powder in proportion, then be placed in mixing equipment in 130 ~ 180 DEG C of melt blending 5 ~ 30min, cool and obtain product.
8. the preparation method of nylon powder/polypropylene carbonate composite material according to claim 7, it is characterized in that, melt blending mixing equipment used is Banbury mixer, single screw extrusion machine or twin screw extruder.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110283312A (en) * | 2018-12-13 | 2019-09-27 | 杭州师范大学 | A kind of in-situ modified poly (propylene carbonate) of poly-lactam and preparation method thereof |
| US10865274B2 (en) | 2016-05-31 | 2020-12-15 | Lg Chem, Ltd. | Poly(alkylene carbonate) resin composition, preparation method thereof, molded article formed therefrom, and preparation method of molded article using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102341455A (en) * | 2009-03-03 | 2012-02-01 | 巴斯夫欧洲公司 | Method for producing polymer mixtures |
| CN102471473A (en) * | 2009-07-05 | 2012-05-23 | 诺沃梅尔公司 | Structurally precise poly(propylene carbonate) compositions |
-
2015
- 2015-08-10 CN CN201510485502.2A patent/CN105176035A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102341455A (en) * | 2009-03-03 | 2012-02-01 | 巴斯夫欧洲公司 | Method for producing polymer mixtures |
| CN102471473A (en) * | 2009-07-05 | 2012-05-23 | 诺沃梅尔公司 | Structurally precise poly(propylene carbonate) compositions |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10865274B2 (en) | 2016-05-31 | 2020-12-15 | Lg Chem, Ltd. | Poly(alkylene carbonate) resin composition, preparation method thereof, molded article formed therefrom, and preparation method of molded article using the same |
| CN110283312A (en) * | 2018-12-13 | 2019-09-27 | 杭州师范大学 | A kind of in-situ modified poly (propylene carbonate) of poly-lactam and preparation method thereof |
| CN110283312B (en) * | 2018-12-13 | 2021-12-28 | 杭州师范大学 | Polylactam in-situ modified polypropylene carbonate and preparation method thereof |
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Application publication date: 20151223 |