CN105602112A - Preparation method of sisal-microcrystal-modified CaCO3/PP (polypropylene) wood-plastic composite material - Google Patents
Preparation method of sisal-microcrystal-modified CaCO3/PP (polypropylene) wood-plastic composite material Download PDFInfo
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- CN105602112A CN105602112A CN201610063343.1A CN201610063343A CN105602112A CN 105602112 A CN105602112 A CN 105602112A CN 201610063343 A CN201610063343 A CN 201610063343A CN 105602112 A CN105602112 A CN 105602112A
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- sisal
- sisal hemp
- plastic composite
- microcrystals
- hemp crystallite
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical class [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 21
- 229920001587 Wood-plastic composite Polymers 0.000 title claims abstract description 18
- 239000011155 wood-plastic composite Substances 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000004743 Polypropylene Substances 0.000 title abstract description 16
- 239000000463 material Substances 0.000 title abstract description 7
- -1 polypropylene Polymers 0.000 title abstract description 5
- 229920001155 polypropylene Polymers 0.000 title abstract description 4
- 244000198134 Agave sisalana Species 0.000 claims abstract description 42
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 25
- 229920000570 polyether Polymers 0.000 claims abstract description 25
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 238000001746 injection moulding Methods 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000001291 vacuum drying Methods 0.000 claims abstract description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims abstract description 8
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims abstract description 7
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 7
- BDAWXSQJJCIFIK-UHFFFAOYSA-N potassium methoxide Chemical compound [K+].[O-]C BDAWXSQJJCIFIK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008117 stearic acid Substances 0.000 claims abstract description 7
- 238000010992 reflux Methods 0.000 claims abstract description 6
- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 235000011624 Agave sisalana Nutrition 0.000 claims description 37
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 10
- 238000012986 modification Methods 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 10
- 239000002244 precipitate Substances 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 6
- 230000002051 biphasic effect Effects 0.000 claims description 5
- 239000008188 pellet Substances 0.000 claims description 5
- 238000005453 pelletization Methods 0.000 claims description 5
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000013081 microcrystal Substances 0.000 abstract 5
- 238000001914 filtration Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000002156 mixing Methods 0.000 abstract 2
- 238000005303 weighing Methods 0.000 abstract 2
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000005469 granulation Methods 0.000 abstract 1
- 230000003179 granulation Effects 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 241000746976 Agavaceae Species 0.000 description 1
- 244000099147 Ananas comosus Species 0.000 description 1
- 235000007119 Ananas comosus Nutrition 0.000 description 1
- 241001669679 Eleotris Species 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 239000003519 biomedical and dental material Substances 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000051 modifying effect Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 102220040412 rs587778307 Human genes 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
- C08G65/332—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof
- C08G65/3322—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof acyclic
Abstract
The invention discloses a preparation method of a sisal-microcrystal-modified CaCO3/PP (polypropylene) wood-plastic composite material. The preparation method comprises the following steps: mixing sisal microcrystals, tetrahydrofuran and potassium methoxide, heating to react for 1 hour under the protection of N2, adding dioxane and glycide, heating to react for 24-26 hours, adding methanol to terminate the reaction, precipitating, filtering, and carrying out vacuum drying for 24 hours to obtain hydroxyl-terminated hyperbranched polyether grafted sisal microcrystals; weighing the hydroxyl-terminated hyperbranched polyether grafted sisal microcrystals, stearic acid and a catalyst, adding into a three-neck flask, stirring to react under reflux for 11-13 hours under the protection of N2, carrying out precipitation separation, filtering, and carrying out vacuum drying to obtain stearate hyperbranched polyether grafted sisal microcrystals; and weighing PP, CaCO3 and the stearate hyperbranched polyether grafted sisal microcrystals, stirring and mixing uniformly, carrying out extrusion granulation in a double screw extruder, and carrying out injection molding by using a vertical injection machine to obtain the sisal-microcrystal-modified CaCO3/PP wood-plastic composite material.
Description
Technical field
The invention belongs to wood plastic composite modification preparing technical field, particularly relate to a kind of sisal hemp crystallite modification CaCO3The preparation method of/PP wood plastic composite.
Background technology
The appearance of PM2.5 index and more and more serious haze weather have beaten alarm bell to our environmental protection. Cause the reason of severe environmental pollution a lot, but the most primary or from the exhaust emission of enterprise, factory. The key of protection of the environment is to reduce the discharge of polluter, greatly develops ecological technique, and this is significant to Resources for construction saving, friendly environment society.
Under such background, this advantage that can bring into play each component in material of wood plastic composite, can make full use of again discarded timber and plastics, reduces environmental pollution, and the environment-friendly materials that reduce production costs more and more get more and more people's extensive concerning. Wood plastic composite had both had the formability of thermoplastic, had again the secondary workability of similar wood, was widely used in the fields such as packaging industry, railroad sleeper, building trade, garden courtyard and automobile inner decorative piece. Cellulose is the natural polymer that reserves are the abundantest, is inexhaustible natural reproducible resource. Sisal hemp has another name called pineapple fibre, belongs to Agavaceae, is perennial leaf fibre crop, Ye Shi world today consumption maximum, and a kind of hard fibre widest in area, its chemical composition is made up of cellulose, lignin, the large component of hemicellulose three and a small amount of extract. Soak because hard fibre characteristic has pure white, strong but pliable in texture (pulling force is strong), springiness, sea water resistance, rub resistance, be difficult for cataclasmly, and colloid is few, and the characteristic such as be difficult for skidding, is the high-quality raw material of preparing wood plastic composite.
Dissaving polymer is the class novel high polymer material growing up nearest decades, the three dimensions molecular structure of its almost spherical shape makes to tangle between strand less, thereby has low viscosity, is difficult for the superior physical and chemical performance such as crystallization and good fluidity. Dissaving polymer can be synthetic by the method for " treating different things alike ", and without careful separation, operating process is simple, can prepare on a large scale and cheaply. Meanwhile, this highly branched structure can, by chemical modification with a large amount of active function groups, have important using value in fields such as nano material, photoelectric material, bio-medical material and supramolecular materials.
The present invention proposes to utilize stearate hyperbranched polyether grafting sisal hemp crystallite modified polypropylene resin, can prepare that cost is low, environmental pollution is little and the ecological wood-plastic composite of excellent performance. Be mainly manifested in and improve its heat endurance, interface compatibility and processing rheological characteristic, and composite is had to obvious toughening modifying effect. This research has no bibliographical information at present.
Summary of the invention
The object of this invention is to provide a kind of sisal hemp crystallite modification CaCO3The preparation method of/PP wood plastic composite.
Concrete steps are:
(1) weigh 0.16 ~ 0.32g sisal hemp crystallite, 10 ~ 20ml oxolane and 40 ~ 80ul potassium methoxide, add successively in the there-necked flask of 250ml N2Under protection, be warming up to 50 ~ 60 DEG C; after isothermal reaction 1h; add again 20 ~ 40ml dioxane and 1.8 ~ 4ml glycidol; be heated to after 92 ~ 95 DEG C of reaction 24 ~ 26h; add 3 ~ 5ml methyl alcohol cessation reaction, finally pour in 50ml organic solvent and precipitate, filter; vacuum drying 24h, makes superbrnaching end-hydroxy polyether grafting sisal hemp crystallite.
(2) take raw material according to following mass ratio, the superbrnaching end-hydroxy polyether grafting sisal hemp crystallite that step (1) makes: stearic acid: catalyst=1:22 ~ 45:0.28 ~ 0.56, the raw material taking adds in there-necked flask at N2Under protection, at 120 ~ 130 DEG C, stirring and refluxing is reacted 11 ~ 13h, after reaction finishes, product is poured into precipitate and separate in the beaker that 40 ~ 50ml organic solvent is housed, filter, and vacuum drying, products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) take 60gPP, 40gCaCO3The stearate hyperbranched polyether grafting sisal hemp crystallite making with 2 ~ 4g step (2) mixes, speed with 600 ~ 1000r/min stirs and evenly mixs, then extruding pelletization in double screw extruder, the rotating speed of double screw extruder is set to 30r/min, five sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C and 180 DEG C, then use vertical injection molding machine by pellet double injection molding, wherein, shot pressure is set to 90bar, injection speed is 80mm/bar, biphasic injection pressure is set to 90bar, injection speed is 50mm/bar, four sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, make sisal hemp crystallite modification CaCO3/ PP wood plastic composite.
Described organic solvent is one or both in ethanol and acetone.
Described catalyst is one or more in phosphoric acid, boric acid, p-methyl benzenesulfonic acid and sulfuric acid.
The inventive method has the following advantages:
(1) raw material resources are abundant, and cheap, environmental pollution is little.
(2) preparation process is simple, is convenient to large-scale production.
(3) interface compatibility of prepared wood plastic composite, mechanical property and processing rheological property are significantly improved.
Detailed description of the invention
The primary raw material that following examples are used: precipitated calcium carbonate (CaCO3, food stage), polypropylene (PP, T30S), stearic acid (SA, 1801), sisal hemp crystallite (MCC, white powder), glycidol (GLD analyzes pure), potassium methoxide solution (CH3OK, analyzes pure), oxolane (chemical pure), dioxane (chemical pure), methyl alcohol (chemical pure), acetone (chemical pure).
Embodiment 1:
(1) weigh 0.16g sisal hemp crystallite, 15ml oxolane and 40ul potassium methoxide, add successively in the there-necked flask of 250ml N2Under protection, be warming up to 55 DEG C; after isothermal reaction 1h; add again 20ml dioxane and 1.8ml glycidol; be heated to after 95 DEG C of reaction 24h; add 3ml methyl alcohol cessation reaction, finally pour in 50ml acetone and precipitate, filter; vacuum drying 24h, makes superbrnaching end-hydroxy polyether grafting sisal hemp crystallite.
(2) take raw material according to following mass ratio, the superbrnaching end-hydroxy polyether grafting sisal hemp crystallite that step (1) makes: stearic acid: p-methyl benzenesulfonic acid=1:22:0.28, the raw material taking adds in there-necked flask at N2Under protection, at 130 DEG C, stirring and refluxing is reacted 11h, after reaction finishes, product is poured into precipitate and separate in the beaker that 40ml acetone is housed, filter, and vacuum drying, products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) take 60gPP, 40gCaCO3The stearate hyperbranched polyether grafting sisal hemp crystallite making with 2g step (2) mixes, speed with 800r/min stirs and evenly mixs, then extruding pelletization in double screw extruder, the rotating speed of double screw extruder is set to 30r/min, five sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C and 180 DEG C, then use vertical injection molding machine by pellet double injection molding, wherein, shot pressure is set to 90bar, injection speed is 80mm/bar, biphasic injection pressure is set to 90bar, injection speed is 50mm/bar, four sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, make sisal hemp crystallite modification CaCO3/ PP wood plastic composite.
The heat decomposition temperature of the composite that the present embodiment makes is brought up to 474 DEG C by 358 DEG C, and melt index is brought up to 3.50g/10min by 1.71g/10min, and impact strength is by 19.1KJ/m2Bring up to 38.3KJ/m2, toughness is by 112.5J/m3Bring up to 1255.8J/m3。
Embodiment 2:
(1) weigh 0.24g sisal hemp crystallite, 15ml oxolane and 50ul potassium methoxide, add successively in the there-necked flask of 250ml N2Under protection, be warming up to 55 DEG C; after isothermal reaction 1h; add again 30ml dioxane and 3ml glycidol; be heated to after 92 DEG C of reaction 26h; add 3.5ml methyl alcohol cessation reaction, finally pour in 50ml acetone and precipitate, filter; vacuum drying 24h, makes superbrnaching end-hydroxy polyether grafting sisal hemp crystallite.
(2) take raw material according to following mass ratio, the superbrnaching end-hydroxy polyether grafting sisal hemp crystallite that step (1) makes: stearic acid: p-methyl benzenesulfonic acid=1:30:0.38, the raw material taking adds in there-necked flask at N2Under protection, at 125 DEG C, stirring and refluxing is reacted 12h, after reaction finishes, product is poured into precipitate and separate in the beaker that 45ml acetone is housed, filter, and vacuum drying, products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) take 60gPP, 40gCaCO3The stearate hyperbranched polyether grafting sisal hemp crystallite making with 3g step (2) mixes, speed with 800r/min stirs and evenly mixs, then extruding pelletization in double screw extruder, the rotating speed of double screw extruder is set to 30r/min, five sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C and 180 DEG C, then use vertical injection molding machine by pellet double injection molding, wherein, shot pressure is set to 90bar, injection speed is 80mm/bar, biphasic injection pressure is set to 90bar, injection speed is 50mm/bar, four sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, make sisal hemp crystallite modification CaCO3/ PP wood plastic composite.
The heat decomposition temperature of the composite that the present embodiment makes is brought up to 476 DEG C by 358 DEG C, and melt index is brought up to 4.14g/10min by 1.71g/10min, and impact strength is by 19.1KJ/m2Bring up to 55.8KJ/m2, toughness is by 112.5J/m3Bring up to 1750.1J/m3。
Embodiment 3:
(1) weigh 0.32g sisal hemp crystallite, 20ml oxolane and 80ul potassium methoxide, add successively in the there-necked flask of 250ml N2Under protection, be warming up to 55 DEG C; after isothermal reaction 1h; add again 40ml dioxane and 4ml glycidol; be heated to after 93.5 DEG C of reaction 25h; add 4ml methyl alcohol cessation reaction, finally pour in 50ml acetone and precipitate, filter; vacuum drying 24h, makes superbrnaching end-hydroxy polyether grafting sisal hemp crystallite.
(2) take raw material according to following mass ratio, the superbrnaching end-hydroxy polyether grafting sisal hemp crystallite that step (1) makes: stearic acid: p-methyl benzenesulfonic acid=1:45:0.56, the raw material taking adds in there-necked flask at N2Under protection, at 120 DEG C, stirring and refluxing is reacted 13h, after reaction finishes, product is poured into precipitate and separate in the beaker that 50ml acetone is housed, filter, and vacuum drying, products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) take 60gPP, 40gCaCO3The stearate hyperbranched polyether grafting sisal hemp crystallite making with 4g step (2) mixes, speed with 800r/min stirs and evenly mixs, then extruding pelletization in double screw extruder, the rotating speed of double screw extruder is set to 30r/min, five sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C and 180 DEG C, then use vertical injection molding machine by pellet double injection molding, wherein, shot pressure is set to 90bar, injection speed is 80mm/bar, biphasic injection pressure is set to 90bar, injection speed is 50mm/bar, four sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, make sisal hemp crystallite modification CaCO3/ PP wood plastic composite.
The heat decomposition temperature of the composite that the present embodiment makes is brought up to 475 DEG C by 358 DEG C, and melt index is brought up to 5.23g/10min by 1.71g/10min, and impact strength is by 19.1KJ/m2Bring up to 64.7KJ/m2, toughness is by 112.5J/m3Bring up to 2186.7J/m3。
Claims (1)
1. a sisal hemp crystallite modification CaCO3The preparation method of/PP wood plastic composite, is characterized in that concrete steps are:
(1) weigh 0.16 ~ 0.32g sisal hemp crystallite, 10 ~ 20ml oxolane and 40 ~ 80ul potassium methoxide, add successively in the there-necked flask of 250ml N2Under protection, be warming up to 50 ~ 60 DEG C, after isothermal reaction 1h, add again 20 ~ 40ml dioxane and 1.8 ~ 4ml glycidol, be heated to after 92 ~ 95 DEG C of reaction 24 ~ 26h, add 3 ~ 5ml methyl alcohol cessation reaction, finally pour in 50ml organic solvent and precipitate, filter, vacuum drying 24h, makes superbrnaching end-hydroxy polyether grafting sisal hemp crystallite;
(2) take raw material according to following mass ratio, the superbrnaching end-hydroxy polyether grafting sisal hemp crystallite that step (1) makes: stearic acid: catalyst=1:22 ~ 45:0.28 ~ 0.56, the raw material taking adds in there-necked flask at N2Under protection, at 120 ~ 130 DEG C, stirring and refluxing is reacted 11 ~ 13h, after reaction finishes, product is poured into precipitate and separate in the beaker that 40 ~ 50ml organic solvent is housed, filter, and vacuum drying, products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite;
(3) take 60gPP, 40gCaCO3The stearate hyperbranched polyether grafting sisal hemp crystallite making with 2 ~ 4g step (2) mixes, speed with 600 ~ 1000r/min stirs and evenly mixs, then extruding pelletization in double screw extruder, the rotating speed of double screw extruder is set to 30r/min, five sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C and 180 DEG C, then use vertical injection molding machine by pellet double injection molding, wherein, shot pressure is set to 90bar, injection speed is 80mm/bar, biphasic injection pressure is set to 90bar, injection speed is 50mm/bar, four sections of temperature from charging aperture to discharging opening are set to respectively 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, make sisal hemp crystallite modification CaCO3/ PP wood plastic composite;
Described organic solvent is one or both in ethanol and acetone;
Described catalyst is one or more in phosphoric acid, boric acid, p-methyl benzenesulfonic acid and sulfuric acid.
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| CN201610063343.1A CN105602112B (en) | 2016-01-31 | 2016-01-31 | Sisal hemp crystallite is modified CaCO3The preparation method of/PP wood plastic composites |
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| CN201610063343.1A CN105602112B (en) | 2016-01-31 | 2016-01-31 | Sisal hemp crystallite is modified CaCO3The preparation method of/PP wood plastic composites |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359157A (en) * | 2018-02-02 | 2018-08-03 | 桂林理工大学 | A kind of preparation method of polyethylene/calcium carbonate/sisal fiber crystallite composite material |
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