CN105602078B - A kind of expansion type flame-retarding eva foam composite and its preparation method and application - Google Patents

A kind of expansion type flame-retarding eva foam composite and its preparation method and application Download PDF

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CN105602078B
CN105602078B CN201610082974.8A CN201610082974A CN105602078B CN 105602078 B CN105602078 B CN 105602078B CN 201610082974 A CN201610082974 A CN 201610082974A CN 105602078 B CN105602078 B CN 105602078B
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retarding
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foam composite
eva foam
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CN105602078A (en
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郑玉婴
连汉青
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Fuzhou University
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    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2497/00—Characterised by the use of lignin-containing materials
    • C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a kind of expansion type flame-retarding eva foam composite and preparation method thereof and use, the foamed composite is formed by EVA, intumescent compound flame retardant, foaming agent, crosslinking agent, stearic acid, zinc stearate and zinc oxide mixing crosslinked foaming；Described intumescent compound flame retardant is：Using APP derivative as acid source and source of the gas, expansible graphite is as synergist, and wood powder is as carbon source, APP derivative, expansible graphite and wood powder in mass ratio 1 ~ 4:1:3 compounding compositions；Described APP derivative is obtained by APP and reacting ethylenediamine.Relative to traditional fire-retardant eva foam composite, expansion type flame-retarding eva foam composite prepared by the present invention has more preferable flame retardant effect, oxygen index (OI) is 26.3% ~ 27.6%, the grades of UL 94 are V 0, the carbon residue layer that burns is more fine and close, there is more preferable processing characteristics simultaneously, there is extensive social and economic benefit.

Description

A kind of expansion type flame-retarding eva foam composite and its preparation method and application
Technical field
The invention belongs to technical field of polymer composite materials, and in particular to a kind of expansion type flame-retarding eva foam composite wood Material and its preparation method and application.
Background technology
There is ethylene-vinyl acetate copolymer (EVA) good mechanics, processing characteristics to have no lack of pliability and elasticity again. Therefore the fields such as packaging, building materials, sports equipment, footwear industry are widely used in.But because EVA foam easily burns, pole Limited oxygen index only reaches 18% or so, greatly limit its application.It is therefore desirable to carry out flame-retardant modified process to it.
The usage type of fire retardant can be divided into addition type and response type.Though reactive flame retardant possesses good anti-flammability, But its technological process is complex, and cost is higher, it is unfavorable for industrializing and application is more narrow；Its resistance of additive flame retardant Combustion process is relatively simple, and cost is relatively low, and the species of fire retardant is also more, and application is wider.Traditional additive flame retardant has Halogen system, heavy metal classes, though this two based flame retardants flame retardant effect is preferable, poisonous and hazardous gas can be produced during its is fire-retardant, It is unfavorable for applying and polluting environment.Inorganic based flame retardant cost is relatively low, and flame retardant effect is good, but its addition is excessive, and with The compatibility of macromolecule matrix is poor so that physical and mechanical properties is greatly reduced.Expansion type flame retardant avoids nuisance well Matter, and have good compatibility with macromolecule matrix, but flame retardant effect is also unstable, and therefore, addition intumescent is answered in EVA With fire retardant, it is highly significant to synthesize a kind of stable expansion type flame-retarding eva foam composite of flame retardant effect.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to the invention provides a kind of expansion type flame-retarding eva foam Composite and preparation method thereof.Obtained foamed composite has good fire resistance, processing characteristics and physical machine The advantages that tool performance.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of expansion type flame-retarding eva foam composite, its raw material composition are：
EVA：60~100 phr；
Intumescent compound flame retardant：10~40 phr；
Foaming agent：2~3 phr；
Crosslinking agent：0.5~1.5 phr；
Stearic acid (St)：0.5~1 phr；
Zinc stearate (ZnSt)：0.1~0.3 phr；
Zinc oxide (ZnO)：0.2~0.8 phr；
Described intumescent compound flame retardant is：With APP derivative (MAPP) for acid source and source of the gas, stone may expand Black (EG) is used as synergist, and wood powder (MF) is used as carbon source, MAPP, EG and MF in mass ratio 1 ~ 4:1:3 compounding compositions；Described is poly- Phosphoric acid ammonium derivative (MAPP) is APP (APP) and ethylenediamine (EDA) reaction gained.
Described foaming agent is azodicarbonamide (AC).
Described crosslinking agent is cumyl peroxide (DCP).
The preparation method of described intumescent compound flame retardant is：By wood powder (MF) and dioctyl phthalate (DOP) It is 5 according to mass ratio:1 is placed in high-speed kneading machine, and 10 min of stirring carry out plasticising processing；By APP derivative (MAPP) wood powder (MF) after, expansible graphite (EG) and plasticising are handled, which is placed in high-speed kneading machine, to be well mixed.
A kind of preparation method of expansion type flame-retarding eva foam composite as described above, specifically includes following steps：
（1）EVA and intumescent compound flame retardant are placed in the uniform min of banburying 5 of banbury, banburying condition is 100 DEG C, turns 25 rpm/min of speed；
（2）To step（1）Foaming agent, crosslinking agent, stearic acid, zinc stearate and oxygen are added in well mixed material Change zinc, discharged after continuing the min of banburying 10, banburying condition is 100 DEG C, the rpm/min of rotating speed 25；
（3）By step（2）The material mixed be transferred to while hot in open type dual-roller cylinder mill be pressed into thickness for 3 ~ 5mm thin slice, is cut into square sheets；
（4）By step（3）The sheet material of cutting is placed in plate vulcanization machine die preheated in advance and carried out at moulded from foam Reason, expansion type flame-retarding eva foam composite is made, moulded from foam treatment conditions are the MPa of pressure 10,180 DEG C of temperature, exchange Foam 10 min.
Described expansion type flame-retarding eva foam composite is applied to packaging, building materials, sports equipment and footwear industry field.
The beneficial effects of the present invention are：Expansion type flame-retarding eva foam composite produced by the present invention and tradition are fire-retardant EVA foam is compared, and has more preferable flame retardant effect, and oxygen index (OI) is that 26.3% ~ 27.6%, UL-94 grades are V-0；And pass Fire-retardant EVA foam of uniting is compared, and has more preferable processing characteristics and physical and mechanical properties, is had extensive market prospects and is shown The economic results in society of work.
Brief description of the drawings
Fig. 1 is the carbon residue ESEM of expansion type flame-retarding eva foam composite and common fire-retardant eva foam composite Figure；
Fig. 2 is the HRR curves and THR of expansion type flame-retarding eva foam composite and common fire-retardant eva foam composite Curve；
Fig. 3 is the tensile strength song of expansion type flame-retarding eva foam composite and common fire-retardant eva foam composite Line.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but the present invention is not limited only to these embodiments.
Comparative example
A kind of eva foam composite, its raw material composition are：
EVA：80 phr；
AC：2.5 phr；
DCP：0.9 phr；
St：0.5 phr；
ZnSt：0.1 phr；
ZnO：0.5 phr；
The preparation process of eva foam composite is as follows：
（1）By EVA and AC, DCP, St, ZnSt, ZnO, the uniform min of banburying 15 of banbury is placed in, banburying condition is 100 DEG C, the rpm/min of rotating speed 25；
（2）It is 4mm that the material that step (1) mixes is transferred in open type dual-roller cylinder mill while hot and is pressed into thickness Thin slice, be cut into square sheets；
（3）The sheet material that step (2) is cut is placed in plate vulcanization machine die preheated in advance and carried out at moulded from foam Reason, eva foam composite is made, moulded from foam treatment conditions are the MPa of pressure 10,180 DEG C of temperature, 10 min of exchange foaming.
Embodiment 1
A kind of expansion type flame-retarding eva foam composite, its raw material composition are：
EVA：60 phr；
Intumescent compound flame retardant：10 phr；
AC：2 phr；
DCP：0.5 phr；
St：0.7 phr；
ZnSt：0.2 phr；
ZnO：0.2 phr；
The preparation method of described intumescent compound flame retardant is：MAPP is made in APP and EDA reactions；By MF and DOP according to Mass ratio is 5:1 is placed in high-speed kneading machine, and 10 min of stirring carry out plasticising processing；Obtained MAPP, EG and plasticising are handled MF afterwards（MAPP, EG and MF mass ratio are 1:1:3）It is placed in high-speed kneading machine and is well mixed.
A kind of preparation method of expansion type flame-retarding eva foam composite as described above, specifically includes following steps：
（1）EVA and intumescent compound flame retardant are placed in the uniform min of banburying 5 of banbury, banburying condition is 100 DEG C, turns 25 rpm/min of speed；
（2）To step（1）AC, DCP, St, ZnSt and ZnO are added in well mixed material, continues banburying 10 Discharged after min；
（3）By step（2）It is 3mm that the material mixed is transferred in open type dual-roller cylinder mill and is pressed into thickness while hot Thin slice, be cut into square sheets；
（4）By step（3）The sheet material of cutting is placed in plate vulcanization machine die preheated in advance and carried out at moulded from foam Reason, expansion type flame-retarding eva foam composite is made, moulded from foam treatment conditions are the MPa of pressure 10,180 DEG C of temperature, exchange Foam 10 min..
Embodiment 2
A kind of expansion type flame-retarding eva foam composite, its raw material composition are：
EVA：80 phr；
Intumescent compound flame retardant：20 phr；
AC：2.5 phr；
DCP：0.9 phr；
St：0.5 phr；
ZnSt：0.1 phr；
ZnO：0.5 phr；
The preparation method of described intumescent compound flame retardant is：MAPP is made in APP and EDA reactions；By MF and DOP according to Mass ratio is 5:1 is placed in high-speed kneading machine, and 10 min of stirring carry out plasticising processing；Obtained MAPP, EG and plasticising are handled MF afterwards（MAPP, EG and MF mass ratio are 2:1:3）It is placed in high-speed kneading machine and is well mixed.
A kind of preparation method of expansion type flame-retarding eva foam composite as described above, specifically includes following steps：
（1）EVA and intumescent compound flame retardant are placed in the uniform min of banburying 5 of banbury, banburying condition is 100 DEG C, turns 25 rpm/min of speed；
（2）To step（1）AC, DCP, St, ZnSt and ZnO are added in well mixed material, continues banburying 10 Discharged after min；
（3）By step（2）It is 4mm that the material mixed is transferred in open type dual-roller cylinder mill and is pressed into thickness while hot Thin slice, be cut into square sheets；
（4）By step（3）The sheet material of cutting is placed in plate vulcanization machine die preheated in advance and carried out at moulded from foam Reason, expansion type flame-retarding eva foam composite is made, moulded from foam treatment conditions are the MPa of pressure 10,180 DEG C of temperature, exchange Foam 10 min.
Embodiment 3
A kind of expansion type flame-retarding eva foam composite, its raw material composition are：
EVA：100 phr；
Intumescent compound flame retardant：40 phr；
AC：3 phr；
DCP：1.5 phr；
St：1 phr；
ZnSt：0.3 phr；
ZnO：0.8 phr；
The preparation method of described intumescent compound flame retardant is：MAPP is made in APP and EDA reactions；By MF and DOP according to Mass ratio is 5:1 is placed in high-speed kneading machine, and 10 min of stirring carry out plasticising processing；Obtained MAPP, EG and plasticising are handled MF afterwards（MAPP, EG and MF mass ratio are 3:1:3）It is placed in high-speed kneading machine and is well mixed.
A kind of preparation method of expansion type flame-retarding eva foam composite as described above, specifically includes following steps：
（1）EVA and intumescent compound flame retardant are placed in the uniform min of banburying 5 of banbury, banburying condition is 100 DEG C, turns 25 rpm/min of speed；
（2）To step（1）AC, DCP, St, ZnSt and ZnO are added in well mixed material, continues banburying 10 Discharged after min；
（3）By step（2）It is 5mm that the material mixed is transferred in open type dual-roller cylinder mill and is pressed into thickness while hot Thin slice, be cut into square sheets；
（4）By step（3）The sheet material of cutting is placed in plate vulcanization machine die preheated in advance and carried out at moulded from foam Reason, expansion type flame-retarding eva foam composite is made, moulded from foam treatment conditions are the MPa of pressure 10,180 DEG C of temperature, exchange Foam 10 min.
Embodiment 4
A kind of expansion type flame-retarding eva foam composite, its raw material composition are：
EVA：90 phr；
Intumescent compound flame retardant：30 phr；
AC：2.7 phr；
DCP：1.2 phr；
St：0.8 phr；
ZnSt：0.2 phr；
ZnO：0.5 phr；
The preparation method of described intumescent compound flame retardant is：MAPP is made in APP and EDA reactions；By MF and DOP according to Mass ratio is 5:1 is placed in high-speed kneading machine, and 10 min of stirring carry out plasticising processing；Obtained MAPP, EG and plasticising are handled MF afterwards（MAPP, EG and MF mass ratio are 4:1:3）It is placed in high-speed kneading machine and is well mixed.
A kind of preparation method of expansion type flame-retarding eva foam composite as described above, specifically includes following steps：
（1）EVA and expansion compound flame redundant are placed in the uniform min of banburying 5 of banbury, banburying condition is 100 DEG C, turns 25 rpm/min of speed；
（2）To step（2）AC, DCP, St, ZnSt and ZnO are added in well mixed material, continues banburying 10 Discharged after min；
（3）By step（2）It is 5mm that the material mixed is transferred in open type dual-roller cylinder mill and is pressed into thickness while hot Thin slice, be cut into square sheets.
（4）By step（3）The sheet material of cutting is placed in plate vulcanization machine die preheated in advance and carried out at moulded from foam Reason, expansion type flame-retarding eva foam composite is made, moulded from foam treatment conditions are the MPa of pressure 10,180 DEG C of temperature, exchange Foam 10 min.
Performance test
Table 1 is the fire-retardant data of expansion type flame-retarding foamed composite, as can be seen from the table, compared with comparative example, this Expansion type flame-retarding foamed composite fire resistance significantly improves made from invention, and oxygen index (OI) is 26.3% ~ 27.6%, hence it is evident that is higher than 18%, the UL-94 grades of comparative example are V-0.
The fire-retardant data of the expansion type flame-retarding foamed composite of table 1
Fig. 1 is expansion type flame-retarding eva foam composite (A) and commonly the carbon residue of fire-retardant eva foam composite (B) is swept Retouch electron microscope.Comparison diagram A and figure B, the carbon residue layer after discovery expansion type flame-retarding eva foam composite burning that can be clearly It is more fine and close, it is less the defects of.Fine and close, regular carbon residue layer can effectively stop or slow down that outside heat and oxygen enter Material internal, play a part of heat-insulated, oxygen barrier.So its flame retardant effect is preferable after addition expansion type flame retardant.
Fig. 2 is expansion type flame-retarding eva foam composite (A) and the HRR songs of common fire-retardant eva foam composite (B) Line（Fig. 2 (a)）With THR curves（Fig. 2 (b)）.The heat release speed of expansion type flame-retarding eva foam composite from the figure not difficult to find Rate（HRR）The HRR of more common flame-retardant foam composite has obvious reduction, the time of maximum HRR Also postponed.By total release heat（THR）Curve map is visible, and total burst size of expansion type flame-retarding foamed composite is smaller.Can See that expansion type flame-retarding eva foam composite has good flame retardant effect.
Fig. 3 is the tensile strength song of expansion type flame-retarding foamed composite (A) and common flame-retardant foam composite (B) Line.As seen from the figure, when fire retardant addition is identical, expansion type flame-retarding foamed composite has more preferable tensile strength, and this is Because the compatibility of fire retardant and material is more preferable.
Expansion type flame-retarding eva foam composite provided by the invention can be widely used in packaging, building materials, locomotory apparatus The fields such as material, footwear industry.
The foregoing is only presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with Modification, it should all belong to the covering scope of the present invention.

Claims (4)

  1. A kind of 1. expansion type flame-retarding eva foam composite, it is characterised in that：The raw material of the foamed composite forms：
    EVA：60~100 phr；
    Intumescent compound flame retardant：10~40 phr；
    Foaming agent：2~3 phr；
    Crosslinking agent：0.5~1.5 phr；
    Stearic acid：0.5~1 phr；
    Zinc stearate：0.1~0.3 phr；
    Zinc oxide：0.2~0.8 phr；
    Described intumescent compound flame retardant is：Using APP derivative as acid source and source of the gas, expansible graphite is as synergistic Agent, wood powder is as carbon source, APP derivative, expansible graphite and wood powder in mass ratio 1 ~ 4:1:3 compounding compositions；Described APP derivative is obtained by APP and reacting ethylenediamine；The preparation method of described intumescent compound flame retardant is： According to mass ratio it is 5 by wood powder and dioctyl phthalate:1 is placed in high-speed kneading machine, and 10 min of stirring are carried out at plasticising Reason；Wood powder after APP derivative, expansible graphite and plasticising are handled is placed in high-speed kneading machine and is well mixed；It is described The preparation method of expansion type flame-retarding eva foam composite, specific steps include：
    （1）EVA and intumescent compound flame retardant are placed in the uniform min of banburying 5 of banbury；
    （2）To step（1）Foaming agent, crosslinking agent, stearic acid, zinc stearate and zinc oxide are added in well mixed material, Discharged after continuing the min of banburying 10；
    （3）By step（2）It is 3 ~ 5mm's that the material mixed, which is transferred to thickness is pressed into open type dual-roller cylinder mill while hot, Thin slice, it is cut into square sheets；
    （4）By step（3）The sheet material cut is placed in progress moulded from foam processing in plate vulcanization machine die preheated in advance, Pressure, temperature, foamed time are respectively 10 MPa, 180 DEG C, 10 min, and expansion type flame-retarding eva foam composite is made；
    Step（1）With step（2）Middle banburying condition is：Temperature is 100 DEG C, the rpm of rotating speed 25.
  2. A kind of 2. expansion type flame-retarding eva foam composite according to claim 1, it is characterised in that：Described foaming Agent is azodicarbonamide.
  3. A kind of 3. expansion type flame-retarding eva foam composite according to claim 1, it is characterised in that：Described crosslinking Agent is cumyl peroxide.
  4. A kind of 4. application of expansion type flame-retarding eva foam composite as claimed in claim 1, it is characterised in that：Described Composite is applied to packaging, building materials, sports equipment and footwear industry field.
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CN106279768A (en) * 2016-08-23 2017-01-04 福州大学 APP derivant of p-phenylenediamine grafting modification and preparation method thereof
CN107245182A (en) * 2017-06-21 2017-10-13 常州碳润新材料科技有限公司 A kind of APP/graphene cooperative flame retardant EVA expanded materials and preparation method thereof
CN108727679A (en) * 2018-05-21 2018-11-02 福州大学 A kind of fire-retardant eva foam composite material of ammonium polyphosphate modifying/graphene
CN108976588B (en) * 2018-08-02 2020-11-03 福州大学 Flame-retardant antistatic EVA foam composite material and preparation method thereof
CN114133658A (en) * 2021-12-30 2022-03-04 胡亮 High-buoyancy high-temperature-resistant EVA material capable of automatically expanding when encountering impact
CN115260564B (en) * 2022-07-26 2023-12-22 青岛科技大学 Flame-retardant fluorosilicone rubber foam and preparation process thereof

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CN101469082A (en) * 2007-12-28 2009-07-01 上海杰事杰新材料股份有限公司 Halogen-free flame-retardant wood-plastic composite material and preparation thereof
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CN101469082A (en) * 2007-12-28 2009-07-01 上海杰事杰新材料股份有限公司 Halogen-free flame-retardant wood-plastic composite material and preparation thereof
CN101255250A (en) * 2008-04-14 2008-09-03 常州市天晟塑胶化工有限公司 Ethane-vinyl acetate copolymer hole-opening foaming profile and method for manufacturing same
CN103382267A (en) * 2013-07-01 2013-11-06 四川大学 Organic amine modified ammonium polyphosphate, preparation method and applications thereof

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