CN101456984B - Method for preparing polyethylene blown film filled with coal slack powder - Google Patents
Method for preparing polyethylene blown film filled with coal slack powder Download PDFInfo
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- CN101456984B CN101456984B CN2009100580294A CN200910058029A CN101456984B CN 101456984 B CN101456984 B CN 101456984B CN 2009100580294 A CN2009100580294 A CN 2009100580294A CN 200910058029 A CN200910058029 A CN 200910058029A CN 101456984 B CN101456984 B CN 101456984B
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Abstract
The invention discloses a preparation method for coal refuse powder padding polyethylene blow molding film. The method is that at first maleic anhydride graft polyolefine is dissolved by a hydrocarbon solvent to prepare a surface treatment agent and then the maleic anhydride graft polyolefine treatment agent is added into dried coal refuse powder according to weight ratio of 2 to 10:100, and then stirring and mixing with high speed are carried out, then polyethylene is premixed with the dried coal refuse powder according to weight ratio of 10 to 45:100 and finally is put into a screw extruder at the temperature of 160 DEG C to 240 DEG C for melting and then is extruded, then blow molding is carried out to form the film by using a film blowing machine. since the maleic anhydride graft polyolefine surface treatment agent used by the invention is amphotericity giant molecules with responsivity, dispersed state of the coal refuse powder in the complex materials can be effectively improved and adjusted, thus improving interface combining ability, keeping relatively large adding amount of the coal refuse powder, meanwhile keeping fine comprehensive pressure performance of the film blowing molding thereof. The preparation method for coal refuse powder padding polyolefine complex material has the advantages of simple technology, convenient operation and low energy consumption.
Description
Technical field
The invention belongs to the preparing technical field of inorganic mineral filler filled high polymer material blown film, be specifically related to a kind of preparation method of polyethylene blown film filled with coal slack powder.
Background technology
Polyethylene film is a class wide application, the great product of consumption, comprises that the worker uses film such as packing film etc., agricultural film such as insulation film, awning film and covering with plastic film, civilian film such as rainproof film and refuse bag film etc.Because polyethylene is to be the synthetic resins that raw material is made with the oil, and oil is non-renewable disposable natural resources, along with skyrocketing of oil price, poly price can be in any more always yet, thereby utilize the filler filled polyethylene to prepare film not only can effectively to reduce cost and save petroleum resources, also might improve some use properties of film.
At present, come filled polyethylene with mineral fillers such as lime carbonate, talcum powder and prepare film to have obtained certain effect.In " research of composite degradation film preparation of PE-talcum powder and performance " (" plastics " (6) P47-49 in 2004), introduce when using the talcum powder filled polyethylene to prepare film as people such as writing styles, talcum powder content is in 20%, the transverse strength of film, horizontal and vertical elongation at break are all better, but content increases and then can cause the performances such as toughness of film significantly to descend.People such as Lu Guina are at " nanometer CaCO
3The research of modification LDPE film dynamic performance " nano-calcium carbonate introduced in (" plastics science and technology " (3) P14-17 in 2004) after handling with surface treatment agent fills new LDPE (film grade); when addition is 2%; film has preferable mechanical property; its horizontal stroke, vertical two to the comparable pure low density polyethylene films of tensile strength improve 18.3% and 14.4%; elongation at break improves 8.4% and 3.3% respectively; but when addition surpassed this and is worth, mechanical properties in films also had decline by a relatively large margin.
Coal gangue is the rock with the coal association, is the solid waste that is separated in coal mining and dressing of coal by washing process, is present quantity discharged and the industrial solid castoff that causes the environmental pollution maximum, at present China to the utilization ratio of coal gangue less than 30%.If the depleted colliery powder can be used as mineral filler and can not only make full use of mineral wealth, reduce product cost, can also effectively reduce pollution to environment, reach the purpose that turns waste into wealth.But since directly fragmentation obtain the colliery powder filled polymer time it is dispersed and interface binding power is all relatively poor, easily in film, reunite or the formation hole when preparing especially for blown film, have a strong impact on film quality even cause can't blown film, thereby do not see that so far the colliery powder filled polyethylene prepares the practical application of film.
But its dispersed and all relatively poor problem of interface combination when improving the colliery powder filled polymer, people contain SiO according to coal gangue
2, Al
2O
3With class carbon black material, its surface has silicon hydroxyl (Si-OH), aluminium hydroxyl reactable groups such as (Al-OH), having attempted elder generation on the one hand calcines colliery powder, with small molecules properties-correcting agent it is carried out surface modification then and solve, attempted also that on the other hand calcining coal gangue powder is not directly carried out surface modification with small molecules properties-correcting agent and solved.In " applied research of silica-alumina carbon black (SAC) filled polypropylene " (" plastics science and technology " (2) P27-31 in 1991), just introduced the coupling agent modified method for preparing matrix material through incinerating colliery powder filled polypropylene of multiple small molecules of using as people such as Wang Jikui.Though its effect is better than pearl filler, and the thermotolerance of matrix material and processing fluidity obviously improve, and intensity and toughness all reduce rapidly with the increase of filler.People such as He Suqin have introduced the employing melt-blending process and have prepared polymkeric substance/coal gangue matrix material in " coal gangue is filled the structure and the performance study of polyamide 6 composite material " (" Chinese plastics " (7) P35-39 in 2006), though adding on a small quantity without the incinerating coal gangue to make the intensity of material and modulus that to a certain degree increase is arranged, but the coal gangue addition increases at 25% o'clock, and tangible decline promptly appears in the intensity of material and modulus.After and for example people such as Li Ying has introduced in " research of colliery powder filling modified polypropylene material " (" plastics " (5) P81-83 in 2007) and with the small molecules titanic acid ester colliery powder has been handled, adopt melt-blending process to prepare polypropylene/colliery powder matrix material, the tensile strength and the shock strength of material have some improvement, but when the colliery powder consumption reached 20%, tangible decline promptly appearred in its tensile strength.
In addition, the patent No. is that ZL's 200410081329.1 disclose in " composite polyolefine material of filling with modified gangue powder and preparation method thereof " and prepares composite polyolefine material with high-molecular weight polydiolefin rubber ring oxidation water-based emulsion as the surface treatment agent of coal gangue, this matrix material is with respect to the matrix material of the preparation of being untreated, its intensity, modulus and toughness improve to some extent, the processing fluidity of matrix material also increases simultaneously, and with respect to the matrix material through low molecular weight surfactant treatment agent Processing of Preparation, its over-all properties has clear improvement.But because of what use is the water-base emulsion treatment agent, colliery powder water content after the processing is big, and water more easily causes the structural changess such as bonding reunion of colliery powder intergranular, and then the performance of meeting remarkably influenced material, so need the colliery powder after handling is carried out strict drying to remove moisture, this makes operating process and complex process undoubtedly, and energy consumption increases.
And above-mentionedly all be not used for blown film with modified gangue filled polyolefin gained matrix material.
Summary of the invention
The objective of the invention is deficiency at existing colliery powder processing mode and surface modification, provide a kind of raw material sources convenient, technology is simple, easy to operate, do not cause the high-molecular weight maleic anhydride graft polyolefine of environmental hazard to handle colliery powder, and with this colliery powder and the compound method for preparing blown film of polyethylene.
The preparation method of polyethylene blown film filled with coal slack powder provided by the invention, the processing step and the condition of this method are as follows:
(1) the maleic anhydride graft polyolefine being joined carbonatoms by weight 1: 1～2 is in 18～30 the varsol, and is heated to 100～130 ℃ and makes its dissolving make treatment agent;
(2) particle diameter 〉=300 purpose colliery powders are dried to water content≤0.1%;
(3) (1) step is prepared maleic anhydride graft polyolefine treatment agent adds in the hot coal spoil powder high-speed stirring mixing 7～10min while hot by weight 2～10: 100;
(4) polyethylene and the colliery powder handled are 100: 10～45 premixs by weight after, adding screw extrusion press melt extrudes at 160～240 ℃, directly with inflation film manufacturing machine blowing film forming, polyethylene is preferably 100: 20 with the weight ratio of the colliery powder of having handled～and 30.
The polyolefinic percentage of grafting of maleic anhydride graft used in the aforesaid method is 1～5%, and is preferred 1～3%, and number-average molecular weight is 1～30,000.
Used maleic anhydride graft polyolefine is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene in the aforesaid method.
Used carbonatoms is that 18～30 varsol is whiteruss or industrial white oil in the aforesaid method.
In the aforesaid method with the film forming processing condition of inflation film manufacturing machine blowing be: blown film is than 2～4, pulling speed 25～30m/min, screw speed 35～40r/min.
The present invention has the following advantages:
1, because the maleic anhydride graft polyolefin surfaces treatment agent that the present invention adopts is reactive both sexes macromole, be the existing sucking action strong nonpolar segment similar to polyethylene, have with the hydroxyl isopolarity group interaction on colliery powder surface stronger again, even can react and reach the anhydride group of Chemical bond effect, thereby can effectively improve and regulate the dispersion state of colliery powder in composite polyethylene material, and the interface binding ability of raising colliery powder and matrix resin, reduced of the influence of defectives such as reunion and hole, enabled to adopt conventional technology blowing film forming the blown film process.
2, owing to the selected polyolefinic molecular weight of maleic anhydride graft of the present invention is big, and be industrialized product, also can conveniently make by oneself, thereby compare with the small molecules treatment agent, not only reduced loss, the toughness of film has been strengthened to some extent, can avoid the phenomenon of material micromolecular migration and film performance deterioration of causing thus when life-time service film strength, and raw material is easy to get low price.
3, the maleic anhydride graft polyolefine of selecting for use owing to the present invention can not only be dissolved in the mineral wet goods varsol preferably, and in colliery powder, has an easy dispersion, the characteristics that mix, thereby not only saved and used organic agent must remove the process of desolvating or using water base treatment agent dry to dewater, simplify technology, made things convenient for operation, reduced energy consumption, and consumption is few, and is little to environment and human influence.
4, because the colliery powder that the present invention handles with the maleic anhydride graft polyolefine can be without calcining, and all be directly to carry out next step operation while hot after the preparation of treatment agent, the surface treatment of colliery powder, thereby further reduced operation, and reduced energy consumption, production cost is reduced greatly.
5, because the maleic anhydride graft polyolefin surfaces treatment agent that the present invention uses has easy dispersion, consumption is few, mix, can improve the characteristics of the interface binding ability of colliery powder and matrix resin, thereby the colliery powder of wherethrough reason can not only be dispersed in the polyethylene matrix preferably, improve intensity, rigidity, toughness and the thermal characteristics of film effectively, and can improve the addition of colliery powder, reduce the film cost.
6, because the film that the colliery powder filled polyethylene that the maleic anhydride graft polyolefine that the inventive method is selected for use makes after handling makes, with respect to handle the polyethylene film that makes through the small molecules treatment agent, its tear strength can improve 10～20%, tensile strength can improve 10～30%, elongation at break can improve 20～60%, sees accompanying drawing 1～6; Appearance of films and qualification rate all have remarkable improvement.
7, because the used colliery powder of the present invention is black gray, thereby filled polyethylene not only can significantly reduce expensive amount of pigment such as carbon black, and help preparing the preparation of agricultural films such as dark color and black thin film, particularly Insulation Mulch Film and dark packing bag.
Description of drawings
Fig. 1 is the film of the embodiment of the invention 2,4,6,7 usefulness maleic anhydride graft polyolefine macromole modified gangue powder filled polyethylenes preparation and the machine direction tear and the colliery powder relation with contents graphic representation of the film for preparing with the hard ester acid of small molecules modified gangue powder filled polyethylene;
Fig. 2 is the film of the embodiment of the invention 2,4,6,7 usefulness maleic anhydride graft polyolefine macromole modified gangue powder filled polyethylenes preparation and the longitudinal tensile strength and the colliery powder relation with contents graphic representation of the film for preparing with the hard ester acid of small molecules modified gangue powder filled polyethylene;
Fig. 3 is the film of the embodiment of the invention 2,4,6,7 usefulness maleic anhydride graft polyolefine macromole modified gangue powder filled polyethylenes preparation and the longitudinal fracture elongation and the colliery powder relation with contents graphic representation of the film for preparing with the hard ester acid of small molecules modified gangue powder filled polyethylene;
Fig. 4 is the film of the embodiment of the invention 2,4,6,7 usefulness maleic anhydride graft polyolefine macromole modified gangue powder filled polyethylenes preparation and the cross direction tear strength and the colliery powder relation with contents graphic representation of the film for preparing with the hard ester acid of small molecules modified gangue powder filled polyethylene;
Fig. 5 is the film of the embodiment of the invention 2,4,6,7 usefulness maleic anhydride graft polyolefine macromole modified gangue powder filled polyethylenes preparation and the transverse tensile strength and the colliery powder relation with contents graphic representation of the film for preparing with the hard ester acid of small molecules modified gangue powder filled polyethylene;
Fig. 6 is the film of the embodiment of the invention 2,4,6,7 usefulness maleic anhydride graft polyolefine macromole modified gangue powder filled polyethylenes preparation and the transverse breakage elongation and the colliery powder relation with contents graphic representation of the film for preparing with the hard ester acid of small molecules modified gangue powder filled polyethylene.
Embodiment
Provide embodiment below so that the present invention will be described in more detail; it is important to point out that following examples can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field still belongs to protection scope of the present invention according to the invention described above content to some nonessential improvement and the adjustment that the present invention makes.
In addition, what deserves to be explained is, below tear strength, tensile strength and the elongation at break of each embodiment gained film be to record according to the method for QB/T1130-91, GB13022-91 and GB13022-91 defined respectively.
Embodiment 1
With percentage of grafting is 1%, and to be 30,000 maleic anhydride inoculated polypropylene join carbonatoms by weight 1: 1 ratio to number-average molecular weight is in 18～30 the whiteruss, and is heated to 100 ℃ and makes its dissolving; Simultaneously particle diameter 〉=300 purpose colliery powders being stirred and are heated to 100 ℃ in homogenizer is dried to material moisture and is lower than 0.1%; Be that 2: 100 ratio adds in the colliery powder of high-speed stirring blending dispersion 7min with the maleic anhydride inoculated polypropylene treatment solution for preparing in maleic anhydride inoculated polypropylene dry and colliery powder weight ratio while hot subsequently.
After polyethylene and the colliery powder handled be 100: 10 premixs by weight, add screw extrusion press and melt extrude at 160～240 ℃, and directly add inflation film manufacturing machine at blown film than 2, pulling speed 30m/min, blowing film forming under the screw speed 35r/min.The machine direction tear of gained film is 57.8N/mm, and longitudinal tensile strength is 5.9MPa, and the longitudinal fracture elongation is 140%, and cross direction tear strength is 65.8N/mm, and transverse tensile strength is 4.5MPa, and the transverse breakage elongation is 25%.
With percentage of grafting is 3%, and to be 1.3 ten thousand maleic anhydride grafted polyethylene join carbonatoms by weight 1: 1.2 ratio to number-average molecular weight is in 18～30 the industrial white oil, and is heated to 120 ℃ and makes its dissolving; Simultaneously particle diameter 〉=300 purpose colliery powders being stirred and are heated to 100 ℃ in homogenizer is dried to material moisture and is lower than 0.1%; Be that 6: 100 ratio adds in the colliery powder of high-speed stirring blending dispersion 10min with the maleic anhydride inoculated polypropylene treatment solution for preparing in maleic anhydride inoculated polypropylene dry and colliery powder weight ratio while hot subsequently.
After polyethylene and the colliery powder handled be 100: 10 premixs by weight, add screw extrusion press and melt extrude at 160～240 ℃, and directly add inflation film manufacturing machine at blown film than 4, pulling speed 30m/min, blowing film forming under the screw speed 40r/min.The machine direction tear of gained film is 58.9N/mm, and longitudinal tensile strength is 6.1MPa, and the longitudinal fracture elongation is 142%, and cross direction tear strength is 66.3N/mm, and transverse tensile strength is 4.6MPa, and the transverse breakage elongation is 24%.
Embodiment 3
With percentage of grafting is 4%, and to be 1.1 ten thousand maleic anhydride grafted polyethylene join carbonatoms by weight 1: 1.5 ratio to number-average molecular weight is in 18～30 the whiteruss, and is heated to 110 ℃ and makes its dissolving; Simultaneously particle diameter 〉=300 purpose colliery powders being stirred and are heated to 100 ℃ in homogenizer is dried to material moisture and is lower than 0.1%; Be that 5: 100 ratio adds in the colliery powder of high-speed stirring blending dispersion 8min with the maleic anhydride inoculated polypropylene treatment solution for preparing in maleic anhydride inoculated polypropylene dry and colliery powder weight ratio while hot subsequently.
After polyethylene and the colliery powder handled be 100: 15 premixs by weight, add screw extrusion press and melt extrude at 160～240 ℃, and directly add inflation film manufacturing machine at blown film than 3, pulling speed 25m/min, blowing film forming under the screw speed 40r/min.The machine direction tear of gained film is 60.9N/mm, and longitudinal tensile strength is 6.2MPa, and the longitudinal fracture elongation is 130%, and cross direction tear strength is 61.2N/mm, and transverse tensile strength is 4.6MPa, and the transverse breakage elongation is 25%.
Embodiment 4
With percentage of grafting is 3%, and to be 1.2 ten thousand maleic anhydride grafted polyethylene join carbonatoms by weight 1: 2 ratio to number-average molecular weight is in 18～30 the whiteruss, and is heated to 130 ℃ and makes its dissolving; Simultaneously particle diameter 〉=300 purpose colliery powders being stirred and are heated to 100 ℃ in homogenizer is dried to material moisture and is lower than 0.1%; Be that 6: 100 ratio adds in the colliery powder of high-speed stirring blending dispersion 7min with the maleic anhydride inoculated polypropylene treatment solution for preparing in maleic anhydride inoculated polypropylene dry and colliery powder weight ratio while hot subsequently.
After polyethylene and the colliery powder handled be 100: 20 premixs by weight, add screw extrusion press and melt extrude at 160～240 ℃, and directly add inflation film manufacturing machine at blown film than 2, pulling speed 30m/min, blowing film forming under the screw speed 35r/min.The machine direction tear of gained film is 63.3N/mm, and longitudinal tensile strength is 6.2MPa, and the longitudinal fracture elongation is 128%, and cross direction tear strength is 56.9N/mm, and transverse tensile strength is 4.7MPa, and the transverse breakage elongation is 26%.
Embodiment 5
With percentage of grafting is 2%, and to be 1.8 ten thousand maleic anhydride grafted polyethylene join carbonatoms by weight 1: 1.6 ratio to number-average molecular weight is in 18～30 the whiteruss, and is heated to 120 ℃ and makes its dissolving; Simultaneously particle diameter 〉=300 purpose colliery powders being stirred and are heated to 100 ℃ in homogenizer is dried to material moisture and is lower than 0.1%; Be that 8: 100 ratio adds in the colliery powder of high-speed stirring blending dispersion 8min with the maleic anhydride inoculated polypropylene treatment solution for preparing in maleic anhydride inoculated polypropylene dry and colliery powder weight ratio while hot subsequently.
After polyethylene and the colliery powder handled be 100: 25 premixs by weight, add screw extrusion press and melt extrude at 160～240 ℃, and directly add inflation film manufacturing machine at blown film than 3, pulling speed 25m/min, blowing film forming under the screw speed 35r/min.The machine direction tear of gained film is 68.5N/mm, and longitudinal tensile strength is 6.6MPa, and the longitudinal fracture elongation is 116%, and cross direction tear strength is 52.3N/mm, and transverse tensile strength is 4.7MPa, and the transverse breakage elongation is 27%.
Embodiment 6
With percentage of grafting is 5%, and to be 1.5 ten thousand maleic anhydride grafted polyethylene join carbonatoms by weight 1: 1.8 ratio to number-average molecular weight is in 18～30 the industrial white oil, and is heated to 100 ℃ and makes its dissolving; Simultaneously particle diameter 〉=300 purpose colliery powders being stirred and are heated to 100 ℃ in homogenizer is dried to material moisture and is lower than 0.1%; Be that 10: 100 ratio adds in the colliery powder of high-speed stirring blending dispersion 9min with the maleic anhydride inoculated polypropylene treatment solution for preparing in maleic anhydride inoculated polypropylene dry and colliery powder weight ratio while hot subsequently.
After polyethylene and the colliery powder handled be 100: 30 premixs by weight, add screw extrusion press and melt extrude at 160～240 ℃, and directly add inflation film manufacturing machine at blown film than 4, pulling speed 30m/min, blowing film forming under the screw speed 40r/min.The machine direction tear of gained film is 73.7N/mm, and longitudinal tensile strength is 7.4MPa, and the longitudinal fracture elongation is 108%, and cross direction tear strength is 47.8N/mm, and transverse tensile strength is 4.8MPa, and the transverse breakage elongation is 28%.
Embodiment 7
With percentage of grafting is 3%, and to be 2.2 ten thousand maleic anhydride grafted polyethylene join carbonatoms by weight 1: 1.3 ratio to number-average molecular weight is in 18～30 the industrial white oil, and is heated to 110 ℃ and makes its dissolving; Simultaneously particle diameter 〉=300 purpose colliery powders being stirred and are heated to 100 ℃ in homogenizer is dried to material moisture and is lower than 0.1%; Be that 10: 100 ratio adds in the colliery powder of high-speed stirring blending dispersion 10min with the maleic anhydride inoculated polypropylene treatment solution for preparing in maleic anhydride inoculated polypropylene dry and colliery powder weight ratio while hot subsequently.
After polyethylene and the colliery powder handled be 100: 45 premixs by weight, add screw extrusion press and melt extrude at 160～240 ℃, and directly add inflation film manufacturing machine at blown film than 2, pulling speed 30m/min, blowing film forming under the screw speed 40r/min.The machine direction tear of gained film is 71.8N/mm, and longitudinal tensile strength is 7.2MPa, and the longitudinal fracture elongation is 60%, and cross direction tear strength is 40.3N/mm, and transverse tensile strength is 4.6MPa, and the transverse breakage elongation is 20%.
Claims (5)
1. the preparation method of a polyethylene blown film filled with coal slack powder, the processing step and the condition of this method are as follows:
(1) the maleic anhydride graft polyolefine being joined carbonatoms by weight 1: 1～2 is in 18～30 the varsol, and is heated to 100～130 ℃ and makes its dissolving make treatment agent;
(2) particle diameter 〉=300 purpose colliery powders are dried to water content≤0.1%;
(3) (1) step is prepared maleic anhydride graft polyolefine treatment agent adds in the hot coal spoil powder high-speed stirring mixing 7～10min while hot by weight 2～10: 100;
(4) polyethylene and the colliery powder handled are 100: 10～45 premixs by weight after, add screw extrusion press and melt extrude at 160～240 ℃, directly use inflation film manufacturing machine blowing film forming,
The polyolefinic percentage of grafting of wherein used maleic anhydride graft is 1～5%, and number-average molecular weight is 1～30,000; Used carbonatoms is that 18～30 varsol is whiteruss or industrial white oil.
2. the preparation method of polyethylene blown film filled with coal slack powder according to claim 1, polyethylene is 100: 20～30 with the weight ratio of the colliery powder of having handled in this method.
3. the preparation method of polyethylene blown film filled with coal slack powder according to claim 1 and 2, the polyolefinic percentage of grafting of maleic anhydride graft used in this method is 1～3%, number-average molecular weight is 1～30,000.
4. the preparation method of polyethylene blown film filled with coal slack powder according to claim 1 and 2, used maleic anhydride graft polyolefine is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene in this method.
5. the preparation method of polyethylene blown film filled with coal slack powder according to claim 3, used maleic anhydride graft polyolefine is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene in this method.
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Citations (3)
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|---|---|---|---|---|
| EP0216479A1 (en) * | 1985-08-12 | 1987-04-01 | Ciba Specialty Chemicals Water Treatments Limited | Polymeric thickeners and their production |
| CN1074452A (en) * | 1992-01-15 | 1993-07-21 | 阎志平 | A kind of production method of plastics |
| CN1631956A (en) * | 2004-11-26 | 2005-06-29 | 四川大学 | Polyolefin composite material filled with modified gangue powder and method for preparing same |
-
2009
- 2009-01-05 CN CN2009100580294A patent/CN101456984B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216479A1 (en) * | 1985-08-12 | 1987-04-01 | Ciba Specialty Chemicals Water Treatments Limited | Polymeric thickeners and their production |
| CN1074452A (en) * | 1992-01-15 | 1993-07-21 | 阎志平 | A kind of production method of plastics |
| CN1631956A (en) * | 2004-11-26 | 2005-06-29 | 四川大学 | Polyolefin composite material filled with modified gangue powder and method for preparing same |
Non-Patent Citations (4)
| Title |
|---|
| Guan Gong et al.Mechanical properties and fracture behavior of injection and compression molded polypropylene/coal gangue powder composites with and without a polymeric coupling agent.《Composites: Part A: applied science and manufacturing》.2007,第38卷(第7期),图表7,第1684页2.1Materials. * |
| 刘颖.煤矸石填充热塑性聚合物复合材料的制备及断裂破坏行为研究.《中国优秀硕士学位论文全文数据库》.2008,(第5期),第54和57页. * |
| 李莹等.煤矸石粉填充改性聚丙烯材料的研究.《塑料》.2007,第36卷(第5期),81-83. * |
| 龚关等.煤矸石粉填充聚丙烯复合材料的性能.《塑料工业》.2004,第32卷(第11期),13-15,45. * |
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