CN1191298C - Rectorte/polypropylene nano comoposite material and its preparing method - Google Patents
Rectorte/polypropylene nano comoposite material and its preparing method Download PDFInfo
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- CN1191298C CN1191298C CNB021393397A CN02139339A CN1191298C CN 1191298 C CN1191298 C CN 1191298C CN B021393397 A CNB021393397 A CN B021393397A CN 02139339 A CN02139339 A CN 02139339A CN 1191298 C CN1191298 C CN 1191298C
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- polypropylene
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Abstract
The present invention relates to a rectorite/polypropylene nanometer composite material and a preparation method thereof. The preparation method belongs to the field of polymer processing. Polypropylene has the disadvantages of poor impact resisting performance, poor low temperature performance, poor size stability, high forming shrinkage rate, insufficient abrasion resistance, low heat denaturation temperature, etc. owing to the aspects of structure, technology, etc. In the present invention, the rectorite/polypropylene nanometer composite material is prepared from the polypropylene, organic rectorite and an auxiliary agent with a melt blending method. The rectorite/polypropylene nanometer composite material of the present invention has the advantages of polypropylene rigidity improvement, proper toughness improvement of the polypropylene, and heat resistance improvement of the polypropylene.
Description
Technical field:
The invention belongs to the manufacture field of polymkeric substance, is a kind of rectorite leng/nanometer composite polypropylene material and preparation method thereof specifically.
Background technology:
China's polypropylene industrial develops rapidly along with the emergence of petrochemical complex, and because acrylic plastering has the every field that advantages such as light weight, the ratio of performance to price are superior are widely used in national product.But in China, polypropylene is because aspects such as structure and technologies, and performance and kind can not satisfy the demand of domestic market, and particularly high-performance, the high value-added product trade mark are few.For example, polypropylene exist to be resisted defectives such as performance, low-temperature performance and dimensional stability be relatively poor, also exists molding shrinkage big simultaneously, wear resistance deficiency, shortcoming such as thermal denaturation temperature is lower.All these hinders polyacrylic development, makes polypropylene be difficult to satisfy product to flexural strength and the requirement of shock strength isostatic in a lot of fields, so MODIFICATION OF POLYPROPYLENE just becomes a research focus.
On polyacrylic toughening modifying, traditional method has three kinds, and the first adopts copolymerization, the method that changes the polypropylene chains structure is carried out modification, it two is adopt to add nucleator, changes the microfacies structure and carries out toughening modifying, and it three is to adopt blend method to carry out toughening modifying.Wherein, the blending method toughening modifying is that the bar cost is low, the method for instant effect.
Polypropene blended toughening modifying method is general to be adopted and moulds-mould toughening modifying and rubber-mould two kinds of methods of toughening modifying.Mould-mould toughening modifying and adopt high density polyethylene(HDPE) and new LDPE (film grade) and its blend; Rubber-mould toughening modifying then adopts elastomerics such as ethylene-propylene rubber(EPR) (EPR), terpolymer EP rubber (EPDM), styrene-butadiene-styrene terpolymer elastomericss and polypropene blended such as (SBS).Adopt elastomerics or rubber toughened modification, though polyacrylic toughness is improved, the intensity of material can obtain very big decline, and thermotolerance also can be affected simultaneously.
Summary of the invention:
The object of the present invention is to provide a kind of rectorite leng/nanometer composite polypropylene material with higher intensity, excellent thermotolerance and heat-resistant aging and a kind of direct, simple, pollution-free, suitability is wide, the simple preparation method of operating procedure.
For achieving the above object, the technical solution used in the present invention is:
A kind of rectorite leng/nanometer composite polypropylene material is characterized in that: the composition of raw materials component (by weight) of described nano composite material is:
Polypropylene 500-1000 part
Organic rectorite clay 5-50 part
Auxiliary agent 0.5-5 part
Above-mentioned raw materials is mixed, adopt melt-blending process can prepare rectorite leng/nanometer composite polypropylene material.
Above-mentioned polypropylene is universal homo-polypropylene or Co-polypropylene.
Above-mentioned organic rectorite clay is quaternary ammonium salt organic rectorite or diamine organic rectorite.
Above-mentioned auxiliary agent can be oxidation inhibitor, photostabilizer, static inhibitor, transparent base.
A kind of preparation method of rectorite leng/nanometer composite polypropylene material, its special character is: organic rectorite 5-50 part of polypropylene 500-1000 part and other auxiliary agents and aequum after mixing 2-5min on the high speed kneader, is melt extruded on twin screw extruder again; Extruder temperature is controlled to be: leading portion 160-180 ℃ stage casing 180-190 ℃ back segment 190-210 ℃, granulation promptly gets the OREC/PP pellet then.
The present invention is with respect to prior art, and advantage of the present invention is:
Rectorite leng/nanometer composite polypropylene material of the present invention makes that also polyacrylic toughness is suitably improved except can improving polyacrylic rigidity, thermotolerance is improved.
Rectorite leng/nanometer composite polypropylene material of the present invention also has good barrier performance, can make container, case and bag and automobile component with it.
Melt-blending process of the present invention neither needs solvent, also is not subjected to the restriction of polymer dissolution, is the most direct, the simplest, pollution-free a kind of, suitability is wide, operating procedure simply prepares organic-inorganic nanocomposite method.
Description of drawings:
Fig. 1 is technological process of production figure of the present invention;
Embodiment:
Rectorite leng (REC) is a kind of nonmetal mineral reserve with regular interstratified structure, and similar with polynite be a kind of layered silicate, interlayer has tradable hydrated cation.REC is one of natural minerals of easily separated one-tenth nano level microplate few in number, and through suitably handling, the REC interstratified structure is separable into class mica and class montmorillonite nano particulate.The singularity of its crystalline structure and the superiority of physicochemical property have determined it can be used widely in a lot of fields.Unmodified rectorite leng belongs to hydrophilic and oleophobic, and rectorite leng and organism after the organic cation exchange have good surperficial affinity.
The method for preparing clay nanocomposites is a lot, and sol-gel method, solution polymer graft process, solution/suspension in-situ monomer intercalation polymerization, polymer melt graft process etc. are arranged.The polymer melt intercalation compounding neither needs solvent, also is not subjected to the restriction of polymer dissolution, is the most direct, the simplest, pollution-free a kind of, suitability is wide, operating procedure simply prepares organic-inorganic nanocomposite novel method.Someone adopts this method to prepare composite nanometer-level polypropylene/montmorillonoid material, polystyrene/clay nano composite material etc.
The present invention be exactly select for use through modification be easy to dispersive clay of laminar silicate rectorite leng and polypropylene blending modified, prepare the nano composite material that impact property and rigidity are improved simultaneously.
Polypropylene (PP) has than excellent comprehensive performances as a kind of general-purpose plastics.Shortcomings such as but simultaneous interpretation systems engineering plastics are compared, and exist intensity and Young's modulus lower, and weathering resistance is poor, and shrinking percentage is big.For many years, people explore the number of chemical method and physical method carries out modification to it, to enlarge its range of application, increase the service life.In recent years, because the development of nano material, the research of inorganic laminated silicate/polymer nanocomposites becomes focus.Because nanoscale effect, under the less condition of inorganic content, the intensity of polymer composites, rigidity, thermotolerance and processing characteristics etc. greatly improve, and its impelling strength can keep again substantially simultaneously, thereby is considered to novel high-performance matrix material of new generation.
Referring to Fig. 1, the present invention with polypropylene 500-1000 part (by weight) and auxiliary agent and organic rectorite 5-50 part after mixing 2-5min on the high speed kneader, on twin screw extruder, melt extrude again; Extruder temperature is controlled to be: leading portion 160-180 ℃ stage casing 180-190 ℃ back segment 190-210 ℃, granulation promptly gets the OREC/PP pellet then.
Above-mentioned polypropylene is universal homo-polypropylene or Co-polypropylene; Above-mentioned organic rectorite clay is quaternary ammonium salt organic rectorite or diamine organic rectorite; Above-mentioned auxiliary agent can be oxidation inhibitor, photostabilizer, static inhibitor, transparent base.
The addition of above-mentioned auxiliary agent is very little, and consumption is 0.5-5 part as oxidation inhibitor, and photostabilizer is generally 0.5-3 part, and the general consumption of static inhibitor is at 0.5 part, and the general consumption of transparent base is less than 0.5 part
Embodiment 1:
10 parts of the organic rectorites of 100 parts of universal homo-polypropylene and other auxiliary agents and aequum after mixing 5min on the high speed kneader, are melt extruded on twin screw extruder again.Extruder temperature control: 170 ℃ of leading portions, 180 ℃ in stage casing, 210 ℃ of back segments, granulation promptly gets the nano composite material pellet then.
Embodiment 2:
5 parts of the organic rectorites of 100 parts of atactic copolymerized polypropenes and other auxiliary agents and aequum after mixing 4min on the high speed kneader, are melt extruded on twin screw extruder again.Extruder temperature control: 160 ℃ of leading portions, 170 ℃ in stage casing, 190 ℃ of back segments, granulation promptly gets the nano composite material pellet then.
Nano composite material performance characterization of the present invention is as follows:
The processibility of table 1 organic rectorite/polymer composites and mechanical property
PP OREC/PP1 OREC/PP2 OREC/PP3
Melt flow 3.81 3.79 3.51 3.15
Index
g/10min
Tensile strength 20 26.5 28.0 25.3
MPa
Modulus in flexure 600 680 720 715
MPa
As can be seen from the above table, the Properties of Polypropylene after organic rectorite modified is greatly improved, and the not too big change of the melt flow index of material.So organic rectorite can be used for polyacrylic enhancing.
The thermal characteristics of table 2 organic rectorite/polymer composites.
Matrix material PP OREC/PP
Vicat softening point ℃ 145 146.5
Initial heat decomposition temperature ℃ 300.5 341.8
The temperature of maximum weight loss rate correspondence ℃ 345.8 401.6
Maximum weight loss rate % 87.0 75.2
As can be seen from Table 2, the not too big variation of the Vicat softening point of matrix material, a lot of but temperature of initial decomposition improves, the also corresponding minimizing of maximum weight loss rate.The thermotolerance that matrix material is described obtains bigger raising.
Proportioning of the present invention and processing method are suitable for the modification of general polypropylene and Co-polypropylene.Resulting modified polypropene can be used to make the pipeline, packing bag, Turnover Box in bumper, chemical building field etc.
Claims (4)
1, rectorite leng/nanometer composite polypropylene material is characterized in that: the composition of raw materials component of described nano composite material is by weight:
Polypropylene 500-1000 part
Organic rectorite clay 5-50 part
Auxiliary agent 0.5-5 part
Auxiliary agent is oxidation inhibitor, photostabilizer, static inhibitor or transparent base,
Above-mentioned raw materials is mixed, adopt melt-blending process can prepare rectorite leng/nanometer composite polypropylene material.
2, rectorite leng/polypropylene composite material according to claim 1 is characterized in that: described polypropylene is universal homo-polypropylene or Co-polypropylene.
3, rectorite leng/nanometer composite polypropylene material according to claim 1 and 2 is characterized in that: described organic rectorite clay is quaternary ammonium salt organic rectorite or diamine organic rectorite.
4, the preparation method of rectorite leng/nanometer composite polypropylene material is characterized in that:
Organic rectorite 5-50 part of polypropylene 500-1000 part and other auxiliary agents and aequum after mixing 2-5min on the high speed kneader, is melt extruded on twin screw extruder again; Extruder temperature is controlled to be: leading portion 160-180 ℃ stage casing 180-190 ℃ back segment 190-210 ℃, granulation promptly gets organic rectorite/polypropylene granules then, and other above-mentioned auxiliary agents are oxidation inhibitor, photostabilizer, static inhibitor or transparent base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021393397A CN1191298C (en) | 2002-08-08 | 2002-08-08 | Rectorte/polypropylene nano comoposite material and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021393397A CN1191298C (en) | 2002-08-08 | 2002-08-08 | Rectorte/polypropylene nano comoposite material and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1473872A CN1473872A (en) | 2004-02-11 |
| CN1191298C true CN1191298C (en) | 2005-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021393397A Expired - Fee Related CN1191298C (en) | 2002-08-08 | 2002-08-08 | Rectorte/polypropylene nano comoposite material and its preparing method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375761C (en) * | 2005-12-22 | 2008-03-19 | 武汉理工大学 | Resin/clay nano composite material and preparation process thereof |
| CN102352097B (en) * | 2011-09-15 | 2012-12-19 | 西北工业大学 | Organic rectorite/polyurea nanocomposite |
| CN115340729B (en) * | 2022-09-05 | 2024-02-02 | 万华化学（宁波）有限公司 | High-toughness polypropylene material for 3D printing and preparation method thereof |
| CN115895040B (en) * | 2022-12-30 | 2023-12-29 | 联塑科技发展(贵阳)有限公司 | Modified layered nano material and application thereof in preparation of PPR material |
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2002
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| CN1473872A (en) | 2004-02-11 |
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