CN108948442A - A kind of natural rubber that tear-resistant intensity is high - Google Patents
A kind of natural rubber that tear-resistant intensity is high Download PDFInfo
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- CN108948442A CN108948442A CN201810626721.1A CN201810626721A CN108948442A CN 108948442 A CN108948442 A CN 108948442A CN 201810626721 A CN201810626721 A CN 201810626721A CN 108948442 A CN108948442 A CN 108948442A
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- Prior art keywords
- sodium alginate
- tear
- natural rubber
- resistant intensity
- calcium sulfate
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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
- C08L7/00—Compositions of natural rubber
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a kind of natural rubbers that tear-resistant intensity is high, it is related to field of rubber technology, is made of following component: natural rubber, stearic acid, vulcanization accelerator, rosin, sodium alginate-calcium sulfate crystal whiskers hybrid particle, anti-aging agent, microwax, 2- thiol benzothiazole, sulphur；The tear-resistant intensity of rubber material can be greatly improved by adding the effect of sodium alginate-calcium sulfate crystal whiskers hybrid particle in the present invention, the tensile strength of raising rubber material by a small margin.
Description
Technical field
The invention belongs to field of rubber technology, and in particular to a kind of natural rubber that tear-resistant intensity is high.
Background technique
Natural rubber (NR) is a kind of with cis- Isosorbide-5-Nitrae-polyisoprene natural polymer as main component,
91%~94% is rubber hydrocarbon (cis- Isosorbide-5-Nitrae-polyisoprene) in ingredient, remaining is the non-rubbers such as protein, fatty acid, ash content, carbohydrate
Glue substance.Natural rubber is most widely used general purpose rubber, and natural rubber (NR) is most widely used general purpose rubber.
It is exactly modified at present with silane coupling agent dialogue carbon blacksurface using more, to reach reduction hard charcoal
Black surface polarity increases the purpose with rubber compatibility, then carries out reinforcement to natural rubber by modified white carbon black, but
It is that modified white carbon black needs melting temperature high in use, easily causes sizing material incipient scorch, and there are the sizing material porosity is higher
Drawback.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of natural rubber that tear-resistant intensity is high is provided.
The present invention is achieved by the following technical solutions:
A kind of natural rubber that tear-resistant intensity is high, is made of following component by weight: natural rubber 100, stearic acid 3-
5, vulcanization accelerator 2-6, rosin 1.0-1.4, sodium alginate-calcium sulfate crystal whiskers hybrid particle 6-12, anti-aging agent 0.2-0.5, micro-
Brilliant wax 2.5-2.8,2- thiol benzothiazole 0.1-0.3, sulphur 1.4-1.8.
Further, the vulcanization accelerator is dithiocar-bamate.
Further, the dithiocar-bamate is aminodithioformic acid potassium.
Further, the anti-aging agent is N-N '-diphenyl-p-phenylenediamine.
Further, the sodium alginate-calcium sulfate crystal whiskers hybrid particle the preparation method comprises the following steps:
Sodium alginate is added in deionized water, after mixing evenly, obtains the sodium alginate soln that mass concentration is 3.55%,
Then nitrate aqueous solution is added into gained sodium alginate soln under stiring and forms reaction system, the nitrate aqueous solution
Additional amount be that sodium alginate soln quality 15% is heated to 80 DEG C, keep the temperature 45min, then adjust the pH value of reaction system to
10.5, the calcium sulfate crystal whiskers of sodium alginate soln quality 25% are added into reaction system, it is small with the stirring 2.5 of 2500r/min revolving speed
When, then ultrasonication 20min, then 2 hours are stood, it is then filtered, is carried out using deionized water to product is filtered again
Cleaning is dried under vacuum to constant weight to neutrality to get sodium alginate-calcium sulfate crystal whiskers hybrid particle.
Further, the nitrate is sodium nitrate, any one or two kinds of arbitrary proportions mix in potassium nitrate.
Further, the nitrate concentration is 1.2mol/L.
Further, the ultrasonic power is 1000W, frequency 40kHz.
Further, the vacuum drying temperature is 60 DEG C.
The present invention has the advantage that the present invention passes through addition sodium alginate-calcium sulfate crystal whiskers hydridization compared with prior art
The tear-resistant intensity of rubber material can be greatly improved in the effect of particle, the tensile strength of raising rubber material by a small margin,
Sodium alginate-calcium sulfate crystal whiskers hybrid particle has better uniformly dispersed, sodium alginate-sulfuric acid in natural rubber system
Calcium pyroborate hybrid particle can be combined preferably with rubber molecule, sodium alginate-calcium sulfate crystal whiskers hybrid particle surface rubber
Glue-line is loose, so that rubber molecular chain can be brilliant in sodium alginate-calcium sulfate in rubber material when by tearing external force
Apparent sliding occurs for palpus hybrid particle surface, therefore tear speed is smaller, and the locomitivity of strand is stronger, strand sliding
Degree is bigger, and finally the strand centered on sodium alginate-calcium sulfate crystal whiskers hybrid particle is in sodium alginate-calcium sulfate crystal whiskers
Hybrid particle two sides are stretched, and form a drawing process, so that the tip of crackle is passivated, molecule during stretching
Chain consumes certain energy and then is broken, and only by bigger external force new crack tip is generated, crackle can be just able to
Continue to extend, therefore, it is strong that sodium alginate-calcium sulfate crystal whiskers hybrid particle improves tearing while being passivated crack tip
Degree tears powerful be significantly improved so that energy of rupture required for tearing process increases.
Specific embodiment
Embodiment 1
A kind of natural rubber that tear-resistant intensity is high, is made of following component by weight: natural rubber 100, stearic acid 3,
Vulcanization accelerator 2, rosin 1.0, sodium alginate-calcium sulfate crystal whiskers hybrid particle 6, anti-aging agent 0.2, microwax 2.5,2- mercapto
Benzothiazole 0.1, sulphur 1.4.
Further, the vulcanization accelerator is dithiocar-bamate.
Further, the dithiocar-bamate is aminodithioformic acid potassium.
Further, the anti-aging agent is N-N '-diphenyl-p-phenylenediamine.
Further, the sodium alginate-calcium sulfate crystal whiskers hybrid particle the preparation method comprises the following steps:
Sodium alginate is added in deionized water, after mixing evenly, obtains the sodium alginate soln that mass concentration is 3.55%,
Then nitrate aqueous solution is added into gained sodium alginate soln under stiring and forms reaction system, the nitrate aqueous solution
Additional amount be that sodium alginate soln quality 15% is heated to 80 DEG C, keep the temperature 45min, then adjust the pH value of reaction system to
10.5, the calcium sulfate crystal whiskers of sodium alginate soln quality 25% are added into reaction system, it is small with the stirring 2.5 of 2500r/min revolving speed
When, then ultrasonication 20min, then 2 hours are stood, it is then filtered, is carried out using deionized water to product is filtered again
Cleaning is dried under vacuum to constant weight to neutrality to get sodium alginate-calcium sulfate crystal whiskers hybrid particle.
Further, the nitrate is sodium nitrate, any one or two kinds of arbitrary proportions mix in potassium nitrate.
Further, the nitrate concentration is 1.2mol/L.
Further, the ultrasonic power is 1000W, frequency 40kHz.
Further, the vacuum drying temperature is 60 DEG C.
Embodiment 2
A kind of natural rubber that tear-resistant intensity is high, is made of following component by weight: natural rubber 100, stearic acid 5,
Vulcanization accelerator 6, rosin 1.4, sodium alginate-calcium sulfate crystal whiskers hybrid particle 12, anti-aging agent 0.5, microwax 2.8,2- mercaptan
Base benzothiazole 0.3, sulphur 1.8.
Further, the vulcanization accelerator is dithiocar-bamate.
Further, the dithiocar-bamate is aminodithioformic acid potassium.
Further, the anti-aging agent is N-N '-diphenyl-p-phenylenediamine.
Further, the sodium alginate-calcium sulfate crystal whiskers hybrid particle the preparation method comprises the following steps:
Sodium alginate is added in deionized water, after mixing evenly, obtains the sodium alginate soln that mass concentration is 3.55%,
Then nitrate aqueous solution is added into gained sodium alginate soln under stiring and forms reaction system, the nitrate aqueous solution
Additional amount be that sodium alginate soln quality 15% is heated to 80 DEG C, keep the temperature 45min, then adjust the pH value of reaction system to
10.5, the calcium sulfate crystal whiskers of sodium alginate soln quality 25% are added into reaction system, it is small with the stirring 2.5 of 2500r/min revolving speed
When, then ultrasonication 20min, then 2 hours are stood, it is then filtered, is carried out using deionized water to product is filtered again
Cleaning is dried under vacuum to constant weight to neutrality to get sodium alginate-calcium sulfate crystal whiskers hybrid particle.
Further, the nitrate is sodium nitrate, any one or two kinds of arbitrary proportions mix in potassium nitrate.
Further, the nitrate concentration is 1.2mol/L.
Further, the ultrasonic power is 1000W, frequency 40kHz.
Further, the vacuum drying temperature is 60 DEG C.
Embodiment 3
A kind of natural rubber that tear-resistant intensity is high, is made of following component by weight: natural rubber 100, stearic acid 4,
Vulcanization accelerator 3, rosin 1.2, sodium alginate-calcium sulfate crystal whiskers hybrid particle 8, anti-aging agent 0.3, microwax 2.6,2- mercapto
Benzothiazole 0.2, sulphur 1.5.
Further, the vulcanization accelerator is dithiocar-bamate.
Further, the dithiocar-bamate is aminodithioformic acid potassium.
Further, the anti-aging agent is N-N '-diphenyl-p-phenylenediamine.
Further, the sodium alginate-calcium sulfate crystal whiskers hybrid particle the preparation method comprises the following steps:
Sodium alginate is added in deionized water, after mixing evenly, obtains the sodium alginate soln that mass concentration is 3.55%,
Then nitrate aqueous solution is added into gained sodium alginate soln under stiring and forms reaction system, the nitrate aqueous solution
Additional amount be that sodium alginate soln quality 15% is heated to 80 DEG C, keep the temperature 45min, then adjust the pH value of reaction system to
10.5, the calcium sulfate crystal whiskers of sodium alginate soln quality 25% are added into reaction system, it is small with the stirring 2.5 of 2500r/min revolving speed
When, then ultrasonication 20min, then 2 hours are stood, it is then filtered, is carried out using deionized water to product is filtered again
Cleaning is dried under vacuum to constant weight to neutrality to get sodium alginate-calcium sulfate crystal whiskers hybrid particle.
Further, the nitrate is sodium nitrate, any one or two kinds of arbitrary proportions mix in potassium nitrate.
Further, the nitrate concentration is 1.2mol/L.
Further, the ultrasonic power is 1000W, frequency 40kHz.
Further, the vacuum drying temperature is 60 DEG C.
Comparative example 1: it is only that with the difference of embodiment 1 and sodium alginate-calcium sulfate crystal whiskers hybrid particle is replaced with into equivalent sea
Mosanom.
Comparative example 2: it is only that with the difference of embodiment 1 and sodium alginate-calcium sulfate crystal whiskers hybrid particle is replaced with into equivalent
Calcium sulfate crystal whiskers.
Comparative example 3: it is only that with the difference of embodiment 1 and sodium alginate-calcium sulfate crystal whiskers hybrid particle is replaced with into alginic acid
Sodium and calcium sulfate crystal whiskers physical mixture.
Comparative example 4: it is only that that calcium sulfate crystal whiskers hybrid particle replaces with equivalent is white by sodium alginate-with the difference of embodiment 1
Carbon black.
Test
Rubber and small powder are kneaded uniformly on a mill according to test recipe in embodiment and comparative example, sizing material is put into novel
It tears in mold, by slice after sulfurizing time vulcanization on 143 DEG C of vulcanizing press, carries out tensile strength, tear-resistant strong
Degree test (being measured by corresponding national standard), comparison；
Table 1
Control group: application number: 201611023378.9；
As can be seen from Table 1, natural rubber prepared by the present invention has excellent tearing-resistant performance, passes through sodium alginate-sulfuric acid
The effect of calcium pyroborate hybrid particle can significantly improve the tear-resistant intensity of rubber material, compared to white carbon black to rubber material
Promotion better effect it is obvious, in the raising to rubber material tensile strength, sodium alginate-calcium sulfate crystal whiskers hybrid particle is mentioned
Ascending effect is not so good as white carbon black.
Claims (9)
1. a kind of natural rubber that tear-resistant intensity is high, which is characterized in that be made by weight of following component: natural rubber
100, stearic acid 3-5, vulcanization accelerator 2-6, rosin 1.0-1.4, sodium alginate-calcium sulfate crystal whiskers hybrid particle 6-12, anti-old
Agent 0.2-0.5, microwax 2.5-2.8,2- thiol benzothiazole 0.1-0.3, sulphur 1.4-1.8.
2. a kind of high natural rubber of tear-resistant intensity according to claim 1, which is characterized in that the vulcanization accelerator
For dithiocar-bamate.
3. a kind of high natural rubber of tear-resistant intensity according to claim 2, which is characterized in that the dithiocarbamates
Formates is aminodithioformic acid potassium.
4. a kind of high natural rubber of tear-resistant intensity according to claim 1, which is characterized in that the anti-aging agent is N-
N '-diphenyl-p-phenylenediamine.
5. a kind of high natural rubber of tear-resistant intensity according to claim 1, which is characterized in that the sodium alginate-
Calcium sulfate crystal whiskers hybrid particle the preparation method comprises the following steps:
Sodium alginate is added in deionized water, after mixing evenly, obtains the sodium alginate soln that mass concentration is 3.55%,
Then nitrate aqueous solution is added into gained sodium alginate soln under stiring and forms reaction system, the nitrate aqueous solution
Additional amount be that sodium alginate soln quality 15% is heated to 80 DEG C, keep the temperature 45min, then adjust the pH value of reaction system to
10.5, the calcium sulfate crystal whiskers of sodium alginate soln quality 25% are added into reaction system, it is small with the stirring 2.5 of 2500r/min revolving speed
When, then ultrasonication 20min, then 2 hours are stood, it is then filtered, is carried out using deionized water to product is filtered again
Cleaning is dried under vacuum to constant weight to neutrality to get sodium alginate-calcium sulfate crystal whiskers hybrid particle.
6. a kind of high natural rubber of tear-resistant intensity according to claim 5, which is characterized in that the nitrate is nitre
Any one or two kinds of arbitrary proportion mixing in sour sodium, potassium nitrate.
7. a kind of high natural rubber of tear-resistant intensity according to claim 6, which is characterized in that the nitrate concentration
For 1.2mol/L.
8. a kind of high natural rubber of tear-resistant intensity according to claim 5, which is characterized in that the ultrasonic power
For 1000W, frequency 40kHz.
9. a kind of high natural rubber of tear-resistant intensity according to claim 5, which is characterized in that the vacuum drying temperature
Degree is 60 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810626721.1A CN108948442A (en) | 2018-06-19 | 2018-06-19 | A kind of natural rubber that tear-resistant intensity is high |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810626721.1A CN108948442A (en) | 2018-06-19 | 2018-06-19 | A kind of natural rubber that tear-resistant intensity is high |
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| CN201810626721.1A Pending CN108948442A (en) | 2018-06-19 | 2018-06-19 | A kind of natural rubber that tear-resistant intensity is high |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938299A (en) * | 2019-11-20 | 2020-03-31 | 东莞市雄林新材料科技股份有限公司 | TPU composite material for chemical protective clothing and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110938299A (en) * | 2019-11-20 | 2020-03-31 | 东莞市雄林新材料科技股份有限公司 | TPU composite material for chemical protective clothing and preparation method thereof |
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