CN105602112B - Sisal hemp crystallite is modified CaCO3The preparation method of/PP wood plastic composites - Google Patents
Sisal hemp crystallite is modified CaCO3The preparation method of/PP wood plastic composites Download PDFInfo
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- CN105602112B CN105602112B CN201610063343.1A CN201610063343A CN105602112B CN 105602112 B CN105602112 B CN 105602112B CN 201610063343 A CN201610063343 A CN 201610063343A CN 105602112 B CN105602112 B CN 105602112B
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- sisal hemp
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- 244000198134 Agave sisalana Species 0.000 title claims abstract description 45
- 235000011624 Agave sisalana Nutrition 0.000 title claims abstract description 45
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 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
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 19
- 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
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 14
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000001291 vacuum drying Methods 0.000 claims abstract description 9
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005453 pelletization Methods 0.000 claims abstract description 6
- BDAWXSQJJCIFIK-UHFFFAOYSA-N potassium methoxide Chemical compound [K+].[O-]C BDAWXSQJJCIFIK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002244 precipitate Substances 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 239000008117 stearic acid Substances 0.000 claims abstract description 6
- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000010992 reflux Methods 0.000 claims abstract description 3
- 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
- 239000000047 product Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 7
- 239000003960 organic solvent Substances 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 230000002051 biphasic effect Effects 0.000 claims description 5
- 239000008188 pellet Substances 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
- 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
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004743 Polypropylene Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 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
- 238000002156 mixing Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 240000004246 Agave americana Species 0.000 description 1
- 235000008754 Agave americana Nutrition 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
- VXJPCEOTZNHHOA-UHFFFAOYSA-N [K].OC Chemical compound [K].OC VXJPCEOTZNHHOA-UHFFFAOYSA-N 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
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 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 kind of sisal hemp crystallite to be modified CaCO3The preparation method of/PP wood plastic composites.Sisal hemp crystallite, tetrahydrofuran and potassium methoxide are blended in N2After the lower h of temperature reaction 1 of protection, dioxane and glycidol are added, after heat temperature raising reacts 24 ~ 26h, methanol terminating reaction is added, precipitates, filtering, be dried in vacuo 24h, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite is made；Superbrnaching end-hydroxy polyether grafting sisal hemp crystallite, stearic acid and catalyst is weighed to add in three-necked flask in N211 ~ 13h of reaction is stirred at reflux under protection, precipitation separation, is filtered, vacuum drying, stearate hyperbranched polyether grafting sisal hemp crystallite is made；Weigh PP, CaCO3Mix and mix with stearate hyperbranched polyether grafting sisal hemp crystallite, the extruding pelletization in double screw extruder, be injection moulded with vertical injection molding machine, that is, sisal hemp crystallite is made and is modified CaCO3/ PP wood plastic composites.
Description
Technical field
The invention belongs to wood plastic composite to be modified preparing technical field, is modified more particularly to a kind of sisal hemp crystallite
CaCO3The preparation method of/PP wood plastic composites.
Background technology
The appearance of PM2.5 indexs and increasingly severe haze weather have beaten alarm bell to our environmental protection.Make
The reason for into severe environmental pollution, is a lot, but the still exhaust emission from enterprise, factory the most primary.Environmental protection
Key is to reduce the discharge of polluter, greatly develops ecological technique, this is to Resources for construction saving, friendly environment society's meaning
It is great.
In this context, wood plastic composite this advantages of can playing each component in material, and can is fully sharp
With discarded timber and plastics, reduce environmental pollution, reduce the environment-friendly materials of production cost more and more by the extensive pass of people
Note.Wood plastic composite had both had the formability of thermoplastic, has the secondary workability of similar wood again, is widely used in
The fields such as packaging industry, railroad sleeper, building trade, garden courtyard and automobile inner decorative piece.Cellulose is that reserves are most abundant
Natural polymer, be inexhaustible natural reproducible resource.Sisal hemp also known as pineapple fibre, belong to American aloe
Section, is perennial leaf fibre crop, and a kind of hard fibre that world today's dosage is maximum, widest in area, its chemical composition
It is made up of cellulose, lignin, three big component of hemicellulose and a small amount of extract.Because hard fibre characteristic has pure white, matter
Ground tough and tensile (pulling force is strong), springiness, sea water resistance leaching, rub resistance, it is not easy cataclasm, and colloid is few, and the characteristic such as be not easy to skid, and is system
The high-quality raw material of standby wood plastic composite.
Dissaving polymer is a kind of novel high polymer material to grow up nearest decades, the three of its almost spherical shape
Dimension space molecular structure to tangle between strand it is less, thus with low viscosity, to be not easy crystallization and good fluidity etc. excellent
Physical and chemical performance more.Dissaving polymer can be synthesized by the method for " treating different things alike ", without carefully separation, operating process
Simply, preparation that can be extensive and inexpensive.Meanwhile this highly branched structure can be by chemical modification with a large amount of
Active function groups, there is important application in fields such as nano material, photoelectric material, bio-medical material and supramolecular materials
Value.
The present invention proposes, using stearate hyperbranched polyether grafting sisal hemp crystallite modified polypropylene resin, to prepare into
This is low, environmental pollution is small and the ecological wood-plastic composite of excellent performance.It is mainly manifested in that to improve its heat endurance, interface compatible
Property and rheological performance, and there is obvious toughening modifying to act on to composite.The research has no document report at present.
The content of the invention
It is an object of the invention to provide a kind of sisal hemp crystallite to be modified CaCO3The preparation method of/PP wood plastic composites.
Concretely comprise the following steps：
(1) 0.16 ~ 0.32g sisal hemps crystallite, 10 ~ 20ml tetrahydrofurans and 40 ~ 80ul potassium methoxides are weighed, is sequentially added
In 250ml three-necked flask, N2Be warming up to 50 ~ 60 DEG C under protection, after the h of isothermal reaction 1, add 20 ~ 40ml dioxane and
1.8 ~ 4ml glycidols, after being heated to 92 ~ 95 DEG C of 24 ~ 26h of reaction, 3 ~ 5ml methanol terminating reactions are added, are finally poured into
Precipitate, filter in 50ml organic solvents, be dried in vacuo 24h, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite is made.
(2) raw material is weighed according to following mass ratio, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite made from step (1):
Stearic acid:Catalyst=1:22~45:0.28 ~ 0.56, the raw material weighed is added in three-necked flask in N2In 120 ~ 130 under protection
11 ~ 13h of reaction is stirred at reflux at DEG C, after reaction terminates, product is poured into precipitation point in the beaker equipped with 40 ~ 50ml organic solvents
From filtering, vacuum drying, products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) 60g PP, 40g CaCO are weighed3With 2 ~ 4g steps (2) made from stearate hyperbranched polyether grafting sisal hemp
Crystallite mixes, and is stirred and evenly mixed with 600 ~ 1000r/min speed, then the extruding pelletization in double screw extruder, twin-screw squeeze
The rotating speed for going out machine is arranged to 30 r/min, five from charging aperture to discharging opening section temperature be respectively set to 185 DEG C, 190 DEG C, 190
DEG C, 190 DEG C and 180 DEG C, then using vertical injection molding machine by pellet double injection molding, wherein, shot pressure is arranged to
90 bar, injection speed are 80 mm/bar, and biphasic injection pressure is arranged to 90 bar, and injection speed is 50 mm/bar, from entering
Material mouth is respectively set to 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding to four sections of temperature of discharging opening, that is, is made
Sisal hemp crystallite is modified CaCO3/ PP wood plastic composites.
The organic solvent is one or both of ethanol and acetone.
The catalyst is the one or more in phosphoric acid, boric acid, p-methyl benzenesulfonic acid and sulfuric acid.
The inventive method has advantages below：
(1) raw material resources are enriched, cheap, and environmental pollution is small.
(2) preparation process is simple, is easy to large-scale production.
(3) interface compatibility, mechanical property and the processing rheological property of the wood plastic composite obtained by obtain significantly
Improve.
Embodiment
Primary raw material used in following examples：Precipitated calcium carbonate（CaCO3, food-grade）, polypropylene (PP, T30S), firmly
Resin acid（SA, 1801), sisal hemp crystallite（MCC, white powder）, glycidol（GLD, analysis are pure）, methanol potassium solution (CH3OK, point
Analyse pure), tetrahydrofuran（Chemistry is pure）, dioxane（Chemistry is pure）, methanol（Chemistry is pure）, acetone（Chemistry is pure）.
Embodiment 1：
(1) 0.16g sisal hemps crystallite, 15ml tetrahydrofurans and 40ul potassium methoxides are weighed, sequentially adds 250ml three mouthfuls of burnings
In bottle, N2It is warming up to 55 DEG C under protection, after the h of isothermal reaction 1, adds 20ml dioxane and 1.8ml glycidols, heats
After being warming up to 95 DEG C of reaction 24h, 3ml methanol terminating reactions are added, finally pours into 50ml acetone and precipitates, are filtered, vacuum drying
24h, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite is made.
(2) raw material is weighed according to following mass ratio, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite made from step (1):
Stearic acid:P-methyl benzenesulfonic acid=1:22:0.28, the raw material weighed is added in three-necked flask in N2Stirred under protection at 130 DEG C
Back flow reaction 11h, after reaction terminates, product is poured into separation is precipitated in the beaker equipped with 40ml acetone, filtered, vacuum drying,
Products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) 60g PP, 40g CaCO are weighed3With 2g steps (2) made from stearate hyperbranched polyether grafting sisal hemp it is micro-
Crystalline substance mixing, is stirred and evenly mixed, then the extruding pelletization in double screw extruder with 800r/min speed, and double screw extruder turns
Speed is arranged to 30 r/min, five from charging aperture to discharging opening section temperature be respectively set to 185 DEG C, 190 DEG C, 190 DEG C, 190
DEG C and 180 DEG C, then using vertical injection molding machine by pellet double injection molding, wherein, shot pressure is arranged to 90 bar,
Injection speed is 80 mm/bar, and biphasic injection pressure is arranged to 90 bar, and injection speed is 50 mm/bar, from charging aperture to going out
Four sections of temperature of material mouth are respectively set to 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, that is, sisal hemp crystallite is made
Modified CaCO3/ PP wood plastic composites.
The heat decomposition temperature of composite made from the present embodiment brings up to 474 DEG C by 358 DEG C, and melt index is by 1.71g/
10min brings up to 3.50g/10min, and impact strength is by 19.1KJ/m2Bring up to 38.3KJ/m2, toughness is by 112.5J/m3Improve
To 1255.8 J/m3。
Embodiment 2：
(1) 0.24g sisal hemps crystallite, 15ml tetrahydrofurans and 50ul potassium methoxides are weighed, sequentially adds 250ml three mouthfuls of burnings
In bottle, N2It is warming up to 55 DEG C under protection, after the h of isothermal reaction 1, adds 30ml dioxane and 3ml glycidols, heating rises
After temperature reacts 26h to 92 DEG C, 3.5ml methanol terminating reactions are added, finally pours into 50ml acetone and precipitates, filtered, vacuum drying
24h, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite is made.
(2) raw material is weighed according to following mass ratio, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite made from step (1):
Stearic acid:P-methyl benzenesulfonic acid=1:30:0.38, the raw material weighed is added in three-necked flask in N2Stirred under protection at 125 DEG C
Back flow reaction 12h, after reaction terminates, product is poured into separation is precipitated in the beaker equipped with 45ml acetone, filtered, vacuum drying,
Products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) 60g PP, 40g CaCO are weighed3With 3g steps (2) made from stearate hyperbranched polyether grafting sisal hemp it is micro-
Crystalline substance mixing, is stirred and evenly mixed, then the extruding pelletization in double screw extruder with 800r/min speed, and double screw extruder turns
Speed is arranged to 30 r/min, five from charging aperture to discharging opening section temperature be respectively set to 185 DEG C, 190 DEG C, 190 DEG C, 190
DEG C and 180 DEG C, then using vertical injection molding machine by pellet double injection molding, wherein, shot pressure is arranged to 90 bar,
Injection speed is 80 mm/bar, and biphasic injection pressure is arranged to 90 bar, and injection speed is 50 mm/bar, from charging aperture to going out
Four sections of temperature of material mouth are respectively set to 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, that is, sisal hemp crystallite is made
Modified CaCO3/ PP wood plastic composites.
The heat decomposition temperature of composite made from the present embodiment brings up to 476 DEG C by 358 DEG C, and melt index is by 1.71g/
10min brings up to 4.14g/10min, and impact strength is by 19.1KJ/m2Bring up to 55.8KJ/m2, toughness is by 112.5J/m3Improve
To 1750.1 J/m3。
Embodiment 3：
(1) 0.32g sisal hemps crystallite, 20ml tetrahydrofurans and 80ul potassium methoxides are weighed, sequentially adds 250ml three mouthfuls of burnings
In bottle, N2It is warming up to 55 DEG C under protection, after the h of isothermal reaction 1, adds 40ml dioxane and 4ml glycidols, heating rises
After temperature reacts 25h to 93.5 DEG C, 4ml methanol terminating reactions are added, finally pours into 50ml acetone and precipitates, filtered, vacuum drying
24h, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite is made.
(2) raw material is weighed according to following mass ratio, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite made from step (1):
Stearic acid:P-methyl benzenesulfonic acid=1:45:0.56, the raw material weighed is added in three-necked flask in N2Stirred under protection at 120 DEG C
Back flow reaction 13h, after reaction terminates, product is poured into separation is precipitated in the beaker equipped with 50ml acetone, filtered, vacuum drying,
Products therefrom is stearate hyperbranched polyether grafting sisal hemp crystallite.
(3) 60g PP, 40g CaCO are weighed3With 4g steps (2) made from stearate hyperbranched polyether grafting sisal hemp it is micro-
Crystalline substance mixing, is stirred and evenly mixed, then the extruding pelletization in double screw extruder with 800r/min speed, and double screw extruder turns
Speed is arranged to 30 r/min, five from charging aperture to discharging opening section temperature be respectively set to 185 DEG C, 190 DEG C, 190 DEG C, 190
DEG C and 180 DEG C, then using vertical injection molding machine by pellet double injection molding, wherein, shot pressure is arranged to 90 bar,
Injection speed is 80 mm/bar, and biphasic injection pressure is arranged to 90 bar, and injection speed is 50 mm/bar, from charging aperture to going out
Four sections of temperature of material mouth are respectively set to 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, that is, sisal hemp crystallite is made
Modified CaCO3/ PP wood plastic composites.
The heat decomposition temperature of composite made from the present embodiment brings up to 475 DEG C by 358 DEG C, and melt index is by 1.71g/
10min brings up to 5.23g/10min, and impact strength is by 19.1KJ/m2Bring up to 64.7KJ/m2, toughness is by 112.5J/m3Improve
To 2186.7 J/m3。
Claims (1)
1. a kind of sisal hemp crystallite is modified CaCO3The preparation method of/PP wood plastic composites, it is characterised in that concretely comprise the following steps：
(1) 0.16 ~ 0.32g sisal hemps crystallite, 10 ~ 20mL tetrahydrofurans and 40 ~ 80 μ L potassium methoxides are weighed, sequentially add 250mL
Three-necked flask in, N2Be warming up to 50 ~ 60 DEG C under protection, after the h of isothermal reaction 1, add 20 ~ 40mL dioxane and 1.8 ~
4mL glycidols, after being heated to 92 ~ 95 DEG C of 24 ~ 26h of reaction, 3 ~ 5mL methanol terminating reactions are added, finally pour into 50mL
Precipitate, filter in organic solvent, be dried in vacuo 24h, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite is made；
(2) raw material is weighed according to following mass ratio, superbrnaching end-hydroxy polyether grafting sisal hemp crystallite made from step (1):It is stearic
Acid:Catalyst=1:22~45:0.28 ~ 0.56, the raw material weighed is added in three-necked flask in N2Under protection at 120 ~ 130 DEG C
11 ~ 13h of reaction is stirred at reflux, after reaction terminates, product is poured into separation is precipitated in the beaker equipped with 40 ~ 50mL organic solvents,
Filtering, vacuum drying, products therefrom are stearate hyperbranched polyether grafting sisal hemp crystallite；
(3) 60g PP, 40g CaCO are weighed3With 2 ~ 4g steps (2) made from stearate hyperbranched polyether grafting sisal hemp crystallite mix
Close, stirred and evenly mixed with 600 ~ 1000r/min speed, then the extruding pelletization in double screw extruder, double screw extruder
Rotating speed is arranged to 30 r/min, five from charging aperture to discharging opening section temperature be respectively set to 185 DEG C, 190 DEG C, 190 DEG C,
190 DEG C and 180 DEG C, then using vertical injection molding machine by pellet double injection molding, wherein, shot pressure is arranged to 90
Bar, injection speed are 80 mm/bar, and biphasic injection pressure is arranged to 90 bar, and injection speed is 50 mm/bar, from charging aperture
Four sections of temperature to discharging opening are respectively set to 185 DEG C, 190 DEG C, 190 DEG C and 50 DEG C, after double injection molding, that is, sisal hemp is made
Crystallite is modified CaCO3/ PP wood plastic composites；
The organic solvent is one or both of ethanol and acetone；
The catalyst is the one or more in phosphoric acid, boric acid, p-methyl benzenesulfonic acid and sulfuric acid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN105602112B true CN105602112B (en) | 2018-04-10 |
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