CN101747557A - Polybutadiene Nano powder rubber toughening polypropylene composite and preparation method thereof - Google Patents

Polybutadiene Nano powder rubber toughening polypropylene composite and preparation method thereof Download PDF

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Publication number
CN101747557A
CN101747557A CN200810209722A CN200810209722A CN101747557A CN 101747557 A CN101747557 A CN 101747557A CN 200810209722 A CN200810209722 A CN 200810209722A CN 200810209722 A CN200810209722 A CN 200810209722A CN 101747557 A CN101747557 A CN 101747557A
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China
Prior art keywords
nano powder
polybutadiene
powder rubber
polypropylene
weight
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Pending
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CN200810209722A
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Chinese (zh)
Inventor
刘宇光
侯静
张学全
高德玉
董伟
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Technical Physics Institute Heilongjiang Academy Of Sciences
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Technical Physics Institute Heilongjiang Academy Of Sciences
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Priority to CN200810209722A priority Critical patent/CN101747557A/en
Publication of CN101747557A publication Critical patent/CN101747557A/en
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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
    • B29C48/25—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
    • 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
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention relates to a polybutadiene nano powder rubber toughening polypropylene composite and a preparation method thereof; at present, the correlational research that the polybutadiene nano powder rubber is used for modifying polypropylene in a blending way; the composite comprises the following ingredients by weight parts: 90-99.5 parts of polypropylene and 0.5-10 parts of nano powder rubber; the nano powder rubber comprises polybutadiene nano powder rubber latex with a complete cross-linked structure and crosslinking sensitizing agents, in the weight part ratio of the nano powder rubber, the polybutadiene nano powder rubber latex and the crosslinking sensitizing agents are 95-99.99 parts and 0.01-5 parts respectively by weight part, in the weight part ratio of the polybutadiene nano powder rubber latex, butadiene and styrene are 95-100 parts and 0-5 parts respectively by weight parts; the polybutadiene nano powder rubber toughening polypropylene composite is used for remodeling polypropylene.

Description

The composition and method of making the same of polybutadiene Nano powder rubber toughening polypropylene
Technical field:
The present invention relates to a kind of polypropylene of retrofiting is the composition of polybutadiene Nano powder rubber toughening polypropylene and the preparation method of said composition thereof.
Background technology:
Polypropylene (PP) is that output is only second to one of three big plastics of polyethylene and polyvinyl chloride.Have good heat-resisting, resistance to chemical attack and electrical insulating property, and have good processing properties and be widely used in fields such as machinery, chemical industry, electric power and transportation.But, because crystalling propylene degree height, spherulite size are thick, cause poor toughness, breach sensitivity, especially low-temperature flexibility poorer (embrittlement temperature only is 8 ℃), thereby limited it in the more application of wide spectrum.Therefore, polyacrylic toughening modifying research is the focus that domestic and international this area is studied always.
Blending and modifying is the effective way of tenacity-increased profax.Utilize the principle of compatibility between components or reactive blending, two or more polymkeric substance and auxiliary agent carried out mechanical blending at a certain temperature, finally form a kind of macroscopical homogeneous phase and the novel material of microcosmic phase-splitting.With ethylene-propylene rubber(EPR) (EPR) and terpolymer EP rubber (EPDM) and polyolefin elastomer (POE)] polypropylene blending modified its over-all properties that can make is improved greatly, be because the backbone structure of these polyolefin elastomers is similar to polypropylene, thereby blend has certain consistency, handle through dynamic vulcanization again can reduce the phase region size, the phase-stable area distributes and effectively inhibitory phase separate.But polyolefin elastomer then is to be cost to sacrifice its mechanical property (modulus) and thermotolerance to the improvement of Properties of Polypropylene.Its toughening modifying pattern is based on " increment is toughness reinforcing ", and promptly tough sex ratio is in elastomeric consumption, so flexible improves must cause modulus and stable on heating reduction.
Polyhutadiene (PB) is the synthetic rubber of big kind, (as EPR, EPDM and POE) compares with conventional polypropylene modified material, not only has tangible price advantage, and also has lower second-order transition temperature (Tg,-110), therefore, as can not only improving polyacrylic low-temperature flexibility, and be expected to use in the very low temperature field with its alternative modification.Yet polyhutadiene and polypropylene compatible are poor, are difficult to blend.Reason is that on the one hand the two mutual solubility is poor, viscosity differences reaches greatly a little less than the interface interaction, easily is separated to cause the increase of phase region size; Be to contain two keys in the polybutadiene configuration on the other hand, thermal stability is poor, in the blend process because of uncertain factors such as heat cross-linking increase, make that the physical and mechanical properties of blend is relatively poor.
At present, though existing research report [Qiao Jinliang etc.] about the Nano powder rubber toughening modified polypropene does not appear in the newspapers with the correlative study of polybutadiene Nano powder rubber blended and modified polypropylene.
Though with rubber toughened plastics is to improve especially flexible universal method of its mechanical property.But because group partition inter-capacitive is poor, interface interaction is little, is difficult to realize the stress transmission; Simultaneously, dispersing uniformity is poor, and the phase region size is big, poor stability, and be easy to produce and be separated.So, adopt traditional method of modifying to be difficult to realize with polybutadiene rubber to polyacrylic toughening modifying.Therefore, the focus that polyhutadiene and polyacrylic blending and modifying technology are this area researches always, but relevant nanostructure original position Study on Compatibility achievement is not appeared in the newspapers so far.
In rubber-plastic blend modification, for incompatible system, normally earlier a certain component is carried out modification, again with its as compatilizer to increase the effect between the co-mixing system median surface, though this can improve mechanical property on certain program, but owing to be uniformly dispersed, stability and phase region size problems such as (micron or submicron), make toughening efficiency low, modified technique complexity, melt temperature height and energy consumption are big.
Summary of the invention:
The purpose of this invention is to provide a kind of remodeling polypropylene--the composition and method of making the same of-polybutadiene Nano powder rubber toughening polypropylene, in blending and modifying is used, realize and the direct blend of polypropylene, simplified modified technique, improved toughening efficiency.
Above-mentioned purpose realizes by following technical scheme:
The composition of polybutadiene Nano powder rubber toughening polypropylene, its composition comprises: polypropylene and Nano powder rubber, its ratio of weight and number are polypropylene 90-99.5 part, Nano powder rubber 0.5-10 part; Described Nano powder rubber comprises polybutadiene Nano powder latex and the crosslinking sensitizer with complete crosslinking structure, and the ratio of weight and number of polybutadiene Nano powder latex and crosslinking sensitizer is polybutadiene Nano powder latex 95-99.99 part and crosslinking sensitizer 0.01-5 part in the shared described ratio of weight and number of Nano powder rubber; Divinyl and cinnamic ratio of weight and number are divinyl 95-100 part in the shared ratio of weight and number of polybutadiene Nano powder latex, vinylbenzene 0-5 part.
The composition of described polybutadiene Nano powder rubber toughening polypropylene, described crosslinking sensitizer are n-BMA or trimethylolpropane trimethacrylate or Viscoat 295 or n-butyl acrylate.
The preparation of compositions method of polybutadiene Nano powder rubber toughening polypropylene, get polybutadiene Nano powder latex 95-99.99 part and crosslinking sensitizer 0.01-5 part uniform mixing by ratio of weight and the number of copies, at ambient temperature, make Nano powder rubber with cobalt source or electron accelerator irradiation and drying, take by weighing described Nano powder rubber 0.5-10 part and the blend in 180-210 ℃ temperature range in twin screw extruder of polypropylene 90-99.5 part, extrude, granulation gets final product.
The preparation of compositions method of described polybutadiene Nano powder rubber toughening polypropylene, divinyl and cinnamic ratio of weight and number are divinyl 95-100 part in the shared ratio of weight and number of described polybutadiene Nano powder latex, vinylbenzene 0-5 part; Described crosslinking sensitizer is n-BMA or trimethylolpropane trimethacrylate or Viscoat 295 or n-butyl acrylate.
Beneficial effect of the present invention:
1. the quantum size effect that adopts the advantage of the polyhutadiene blended and modified polypropylene of nanometer powderization to be embodied in its nanoparticle can significantly be improved interface compatibility, because the good dispersiveness of nanoparticle not only makes the phase region size dwindle, and itself and basal body interface effect are strengthened, interfacial phase increases; Simultaneously, also because the distinctive complete crosslinking structure of this nanoparticle (gel fraction 〉=97%), Heat stability is good, so can get rid of unfavorable factor such as crosslinked in the blend process, realization is to polypropylene toughness-increasing modified purpose.
2. adopt cobalt-60 radiosterilize to polybutadiene Nano powder latex radiation vulanization, and add sensitizing agent (bifunctional or polyfunctional group reactive monomer) reduction radiation dose, making particle diameter behind vacuum spray drying is that 50-100nm vulcanizes polybutadiene Nano powder rubber (gel fraction 〉=97%) entirely.On the one hand, because the highly cross-linked structure of full sulfuration polyhutadiene powdered rubber can effectively suppress interparticle adhesion; On the other hand, polar group contained in the sensitizing agent molecular structure has also increased interparticle coulombic repulsion, has both helped preventing reuniting, and helps particle homodisperse in matrix again.Therefore, prepared polybutadiene Nano powder rubber and the direct blend of polypropylene of available present method can realize toughness reinforcing enhanced modification purpose.
3. prepare toughening compositions with Nano powder rubber and polypropylene fusion blend,, be widely used because Nano powder rubber homodisperse in polypropylene can make toughened polypropylene composition have good low-temperature flexibility.
4. utilization of the present invention 60Co gamma-radiation or rumbatron electron beam carry out pre-radiation crosslinking to polybutadiene latex, the full sulfuration of preparation polybutadiene Nano powder rubber behind vacuum spray drying.And adopt the reactive monomer sensitizing agent to reduce the radiation vulanization required dosage, reduce degraded.Because the full crosslinking structure of nanometer powder can suppress interparticle reunion, the sensitizing agent component polarity that can improve particle more helps it and disperses in polymeric matrix in addition.Nanometer size effect obviously improves interface compatibility, is uniformly dispersed, improved stability, and toughening efficiency significantly improves.Therefore, can realize polyhutadiene and the direct blend of polypropylene, need not dynamic vulcanization and can simplify modified technique, reduce blending temperature, improve toughening efficiency through the nanometer powder processing.
5. process characteristic of the present invention: the system consistency is improved, and can interact with matrix owing to the height of nanoparticle surface atom is unsaturated and improve interface compatibility, makes inconsistent polyhutadiene/polypropylene system realize the blending technology modification; Blending technology is simplified, and the dispersiveness that nanoparticle is good increases homogeneity, and the phase region size is dwindled, and interfacial phase concentration increases, and can need not dynamic vulcanization and handle the purpose that reaches the phase-stable area.Simultaneously, also because the distinctive complete crosslinking structure of this nanoparticle (gel fraction 〉=97%), Heat stability is good, so can get rid of unfavorable factor such as crosslinked in the blend process, realization is to polypropylene toughness-increasing modified purpose.
6. the present invention is equipped with polybutadiene Nano powder rubber with the radiation vulanization legal system, and particle diameter is nanoscale and distributes (50-100nm) gel content height (gel fraction is more than 97%); Polyhutadiene is through the nanometer powder processing, significantly improve the consistency of itself and crystalline polymer, and inhibitory phase separates; The constructional feature of nanoparticle makes it need not dynamic vulcanization in modification and gets final product stabilising rubber phase site size, and blending technology is simplified, and energy consumption is low; Polybutadiene Nano powder rubber toughening efficient height, consumption is few, and the loss of composition modulus is little; Can realize regulation and control to material mechanical performance by adjusting the blend components ratio, and make toughness of material adjustable continuously, method of modifying is simple and easy to do, is suitable for the design and the exploitation of different mechanical properties material especially.The mechanical property of product of the present invention: tensile strength: greater than 30MPa; Elongation at break: greater than 15%; Shock strength (23 ℃): greater than 15kJ/m 2Shock strength (20 ℃): greater than 2.8kJ/m 2
Embodiment:
Embodiment 1:
The composition of polybutadiene Nano powder rubber toughening polypropylene, its composition comprises: polypropylene and Nano powder rubber, its parts by weight are polypropylene 90-99.5 kilogram, Nano powder rubber 0.5-10 kilogram; Described Nano powder rubber comprises polybutadiene Nano powder latex and the crosslinking sensitizer with complete crosslinking structure, and the ratio of weight and number of polybutadiene Nano powder latex and crosslinking sensitizer is polybutadiene Nano powder latex 95-99.99 part and crosslinking sensitizer 0.01-5 part in the shared described parts by weight of Nano powder rubber; Divinyl and cinnamic ratio of weight and number are divinyl 95-100 part in the shared ratio of weight and number of polybutadiene Nano powder latex, vinylbenzene 0-5 part.
Embodiment 2:
The composition of described polybutadiene Nano powder rubber toughening polypropylene, described crosslinking sensitizer are n-BMA or trimethylolpropane trimethacrylate or Viscoat 295 or n-butyl acrylate.
Embodiment 3:
The preparation of compositions method of polybutadiene Nano powder rubber toughening polypropylene, get polybutadiene Nano powder latex 95-99.99 kilogram and crosslinking sensitizer 0.01-5 kilogram uniform mixing by ratio of weight and the number of copies, at ambient temperature, make Nano powder rubber with the sulfuration of cobalt source or electron accelerator irradiation and through vacuum spray drying, take by weighing described Nano powder rubber 0.5-10 kilogram and the blend in 180-210 ℃ temperature range in twin screw extruder of polypropylene 90-99.5 kilogram, extrude, granulation gets final product.Adopt cobalt-60 radiosterilize to the pre-radiation vulanization of polybutadiene Nano powder latex, and add reactive monomer sensitizing agent (bifunctional or polyfunctional group reactive monomer) reduction radiation dose, reduce degraded.Making particle diameter behind vacuum spray drying is the full sulfuration polybutadiene Nano powder rubber (gel fraction 〉=97%) of 50-100nm, and radiation dose is less than 50kGy.This Nano powder rubber is to pass through after including the polybutadiene latex uniform mixing of sensitizing agent 60Co gamma-radiation or accelerator electron beam irradiation and drying prepare.The toughening modifying that is used for crystalline polymers such as polypropylene, consumption 0.5-10%.
Embodiment 4:
The preparation of compositions method of above-mentioned polybutadiene Nano powder rubber toughening polypropylene, divinyl and cinnamic ratio of weight and number are divinyl 95-100 part in the shared parts by weight of described polybutadiene Nano powder latex, vinylbenzene 0-5 part; Described crosslinking sensitizer is n-BMA or trimethylolpropane trimethacrylate or Viscoat 295 or n-butyl acrylate.
Embodiment 5:
With 0.117ml (density: 0.895g/cm 3) unsaturated monomer (as: n-BMA) join 100ml (solid content: 42%) in the polybutadiene latex (ratio of weight and number is 0.25: 99.75), behind the thorough mixing, in air ambient, under the room temperature condition, with cobalt source or electron accelerator irradiation, absorption dose is controlled at 30kGy.Latex behind the irradiation is made polybutadiene Nano powder rubber after with vacuum spraying device drying.Its size distribution is 26-100nm, and gel fraction is 99.5%.
Take by weighing above-mentioned polybutadiene Nano powder rubber 2g, behind 98g polypropylene (ratio of weight and number 2: 98) and 0.49g antioxidant 1010 (account for polypropylene quality 0.5%) mixing, blend under 190 ℃ of-210 ℃ of temperature program(me)s in twin screw extruder, extrude, granulation; After 100 ℃ of oven dry, with injection moulding machine injection moulding batten and by GB G B/T 1042-92, G B/T 1043-93, G B 1633-79 method is carried out performance test.
The respective performances analytical results is respectively:
Tensile strength: 28.5MPa;
Elongation at break: 263%;
Shock strength (23 ℃): 21.6kJ/m2;
Shock strength (20 ℃): 2.8kJ/m2.

Claims (4)

1. the composition of a polybutadiene Nano powder rubber toughening polypropylene, its composition comprises: polypropylene and Nano powder rubber is characterized in that: its ratio of weight and number is polypropylene 90-99.5 part, Nano powder rubber 0.5-10 part; Described Nano powder rubber comprises polybutadiene Nano powder latex and the crosslinking sensitizer with complete crosslinking structure, and the ratio of weight and number of polybutadiene Nano powder latex and crosslinking sensitizer is polybutadiene Nano powder latex 95-99.99 part and crosslinking sensitizer 0.01-5 part in the shared described ratio of weight and number of Nano powder rubber; Divinyl and cinnamic ratio of weight and number are divinyl 95-100 part in the shared ratio of weight and number of polybutadiene Nano powder latex, vinylbenzene 0-5 part.
2. the composition of polybutadiene Nano powder rubber toughening polypropylene according to claim 1, it is characterized in that: described crosslinking sensitizer is n-BMA or trimethylolpropane trimethacrylate or Viscoat 295 or n-butyl acrylate.
3. the preparation of compositions method of a polybutadiene Nano powder rubber toughening polypropylene, it is characterized in that: get polybutadiene Nano powder latex 95-99.99 part and crosslinking sensitizer 0.01-5 part uniform mixing by ratio of weight and the number of copies, at ambient temperature, make Nano powder rubber with cobalt source or electron accelerator irradiation and drying, take by weighing described Nano powder rubber 0.5-10 part and the blend in 180-210 ℃ temperature range in twin screw extruder of polypropylene 90-99.5 part, extrude, granulation gets final product.
4. the preparation of compositions method of polybutadiene Nano powder rubber toughening polypropylene according to claim 3, it is characterized in that: divinyl and cinnamic ratio of weight and number are divinyl 95-100 part in the shared ratio of weight and number of described polybutadiene Nano powder latex, vinylbenzene 0-5 part; Described crosslinking sensitizer is n-BMA or trimethylolpropane trimethacrylate or Viscoat 295 or n-butyl acrylate.
CN200810209722A 2008-12-17 2008-12-17 Polybutadiene Nano powder rubber toughening polypropylene composite and preparation method thereof Pending CN101747557A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103540019A (en) * 2013-10-28 2014-01-29 黑龙江省科学院技术物理研究所 Polypropylene blend with high melt strength and preparation method thereof
CN104559205A (en) * 2015-01-04 2015-04-29 沈阳化工大学 Preparation method of in-situ toughening polypropylene alloy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103540019A (en) * 2013-10-28 2014-01-29 黑龙江省科学院技术物理研究所 Polypropylene blend with high melt strength and preparation method thereof
CN103540019B (en) * 2013-10-28 2015-09-09 黑龙江省科学院技术物理研究所 One has high melt strength polypropylene blend and preparation method thereof
CN104559205A (en) * 2015-01-04 2015-04-29 沈阳化工大学 Preparation method of in-situ toughening polypropylene alloy
CN104559205B (en) * 2015-01-04 2017-09-05 沈阳化工大学 A kind of preparation method of in-situ flexible polypropylene alloy

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Open date: 20100623