CN106479027A - A kind of preparation method of ultra-high molecular weight polyethylene composite material - Google Patents
A kind of preparation method of ultra-high molecular weight polyethylene composite material Download PDFInfo
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- CN106479027A CN106479027A CN201611105381.5A CN201611105381A CN106479027A CN 106479027 A CN106479027 A CN 106479027A CN 201611105381 A CN201611105381 A CN 201611105381A CN 106479027 A CN106479027 A CN 106479027A
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- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5425—Silicon-containing compounds containing oxygen containing at least one C=C bond
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- 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
- C08J2323/06—Polyethene
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Abstract
A kind of preparation method of ultra-high molecular weight polyethylene composite material, belongs to field of material preparation it is characterised in that comprising the steps：（1）Weigh dried UHMWPE heat while stirring on temperature constant magnetic stirring machine standby；（2）Weigh mixed material to load in grinding tool, carry out precompressed；（3）The grinding tool pressing in advance is put in hot stove and is heated；（4）Subsequently again grinding tool is put into heating in hot stove；（5）Finally final pressure compacting is being carried out to it, the then demoulding completes to prepare.Using cross-linking agent and nanoparticle modified synergic UHMWPE, prepare the composite of wearability excellent performance, and preparation method process is simple of the present invention is easily operated, is suitable to popularization and application.
Description
Technical field
The invention belongs to field of material preparation, more particularly, to a kind of preparation side of ultra-high molecular weight polyethylene composite material
Method.
Background technology
Ultra-high molecular weight polyethylene UHMWPE is a kind of very big polymer of linear molecular weight, does not have side chain, hardly
Containing unsaturated group, do not contain active group yet, so UHMWPE can use under cryogenic, have data to show, -196
Under DEG C liquid nitrogen environment, UHMWPE also shows good tensile strength and impact strength；Simultaneously as the knot of this highly linear
Structure, UHMWPE also shows excellent corrosion resistance, is not corroded for most acid-alkali salt, only at high temperature
Just it is slightly soluble in some organic solvents.
Engineering plastics have much excellent process based prediction model, including tensile strength, high toughness, low-friction coefficient
With chemical resistance etc., and these performances are all not available for a lot of metals, therefore engineering plastics are in a lot of fields
Can be used to replace the effect of metal, and ultra-high molecular weight polyethylene（UHMWPE）It is a kind of new engineering material, so its tool
There are using value widely and Research Prospects.The wearability of UHMWPE is first of plastics, and wearability is higher 7-8 times than iron and steel,
Impact strength is even more higher 2 times than PC, exceeds 4 times than ABS, higher 14 times than POM；And there is the unrivaled noise reduction of other materials
Property, resistance to chemical attack, the performance that low temperature resistant and coefficient of friction is low, in biology, information, chemical industry, medical science, electronics, textile machine etc.
Field is widely used.But UHMWPE also has some shortcomings, such as abrasive wear resistance is not good, and surface is hard
The low and creep resisting ability of degree is weak etc., and therefore, UHMWPE is carried out with property modification makes it preferably be applied in actual production
It is very necessary.
Content of the invention
Present invention seek to address that the problems referred to above, provide a kind of preparation method of ultra-high molecular weight polyethylene composite material.
The technical scheme is that：
A kind of preparation method of ultra-high molecular weight polyethylene composite material is it is characterised in that comprise the steps：
（1）Weigh dried UHMWPE to heat while stirring on temperature constant magnetic stirring machine, add cross-linking agent, cross-linking agent is used
Dehydrated alcohol dilutes, and heating-up temperature is 60 DEG C, stops heating after dehydrated alcohol evaporation completely, standby；
（2）Weigh 15-20g step（1）Mixed material loads in grinding tool, carries out precompressed, and pressure is 6MPa, and the dwell time is
60s；
（3）The grinding tool pressing in advance is put in hot stove and is heated, after temperature is 135 DEG C, be incubated 20min at this temperature；
Again it is suppressed after 20min, this time pressure is 12MPa, the dwell time is 5min；
（4）Subsequently again grinding tool is put into heating in hot stove, be incubated 30min at 205 DEG C；
（5）Last write compacting it is carried out with last 12MPa pressure, the then demoulding completes to prepare.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, the baking temperature of described UHMWPE is
90 DEG C, drying time is 12h.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, described cross-linking agent is crosslinked with silicane
Agent.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, is placed on 95 DEG C of water after the described demoulding
Heat 24h in bath.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, described dwell time 5min.
The method have technical effect that：
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, is worked in coordination with using cross-linking agent and nanoparticle and changes
Property UHMWPE, prepares the composite of wearability excellent performance, and preparation method process is simple of the present invention is easily operated,
It is suitable to popularization and application.
Specific embodiment
Embodiment 1
A kind of preparation method of ultra-high molecular weight polyethylene composite material is it is characterised in that comprise the steps：
（1）Weigh dried UHMWPE to heat while stirring on temperature constant magnetic stirring machine, add cross-linking agent, cross-linking agent is used
Dehydrated alcohol dilutes, and heating-up temperature is 60 DEG C, stops heating after dehydrated alcohol evaporation completely, standby；
（2）Weigh 15-20g step（1）Mixed material loads in grinding tool, carries out precompressed, and pressure is 6MPa, and the dwell time is
60s；
（3）The grinding tool pressing in advance is put in hot stove and is heated, after temperature is 135 DEG C, be incubated 20min at this temperature；
Again it is suppressed after 20min, this time pressure is 12MPa, the dwell time is 5min；
（4）Subsequently again grinding tool is put into heating in hot stove, be incubated 30min at 205 DEG C；
（5）Last write compacting it is carried out with last 12MPa pressure, the then demoulding completes to prepare.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, the baking temperature of described UHMWPE is
90 DEG C, drying time is 12h.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, described cross-linking agent is crosslinked with silicane
Agent.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, is placed on 95 DEG C of water after the described demoulding
Heat 24h in bath.
The preparation method of ultra-high molecular weight polyethylene composite material of the present invention, described dwell time 5min.
The size of UHMWPE composite is 80mm × 10mm × 5mm, and mating plate material is GGr15 steel ball, a diameter of 5mm, test
Relative humidity is carried out under conditions of (60 ± 3) % at room temperature, and the pressure on experimental unit's area is 10MPa, and reciprocal distance is
5mm, test continues 2 hours.Before experiment first with ethanol by surface of test piece and mating plate wiped clean it is therefore an objective to go out decontamination and
Oil, is tested after drying and claiming its weight m0 again, and experiment carries out weighing m1 after terminating again, with the increase of sliding speed,
The coefficient of friction of the crosslinked UHMWPE material of UHMWPE and DTBP is also gradually increased；Coefficient of friction increase main cause be, with
The increase of sliding speed, mantle friction heat increase, temperature can be made to raise, and within the specific limits, coefficient of friction can be with temperature
Degree rising and increase, thus also resulting in the increase of wear extent.Whether through cross-linking modified, the material of cross-linking agent DTBP
Coefficient of friction be all that comparison is sensitive to the change of speed, particularly sliding speed when 75r/min changes to 105r/min,
The coefficient of friction of material there occurs larger change.But it is as the increase of dosage of crosslinking agent, sliding speed is to coefficient of friction
Sensitivity reduces, and when speed is 35r/min, when DTBP content is more than 0.2%, coefficient of friction becomes larger, and amount of increase is relatively
Greatly；When speed is 70r/min, when DTBP content is more than 0.2% although coefficient of friction is gradually increased, but increase amplitude but
It is not apparent；And speed is when being 105r/min, when DTBP content is more than 0.4%, coefficient of friction is in even the trend reducing.This
Illustrate, through the modified UHMWPE of DTBP compared with pure UHMWPE although both coefficient of frictions are all with the increase of sliding speed
And increase, but the modified UHMWPE of DTBP is eventually little than pure UHMWPE to the sensitivity of sliding speed.
The specific wear rate of the crosslinked UHMWPE material of UHMWPE and DTBP all increases with the increase of sliding speed,
The wearability further illustrating material reduces with the increase of speed；For under different sliding speeds, the specific wear of material
Rate is all in first reducing the trend increasing afterwards, and is all that the specific wear rate of material is minimum when DTBP content is 0.4%-0.45%,
Wearability is optimal；As a whole, when speed is（35r/min、75r/min）When, specific wear rate amplitude of variation is big, and material
Wearability amplitude of variation is big, but when speed increases further, the wearability amplitude of variation of material reduces on the contrary.Thus can obtain
Go out, no matter under which kind of velocity conditions, UHMWPE is improved through the wearability of the chemical crosslinking modified post-consumer polymer of DTBP.
When DTBP content is 0.2%-0.3%, the coefficient of friction of modified UHMWPE is minimum；When DTBP content is
During 0.4%-0.45%, the specific wear rate of modified UHMWPE is minimum.So, there is one most preferably with DTBP modified UHMWPE
Scope, when DTBP consumption is between 0.2%-0.45%, the coefficient of friction of UHMWPE is minimum, and wearability is optimal., with DTBP
Equally, under different sliding speeds, the coefficient of friction of crosslinked UHMWPE also increases with the increase of sliding speed；No matter
Under what conditions, the increase of the friction coefficient cross-linking agent A-151 content of UHMWPE is all in first reducing the trend increasing afterwards；
As a whole, the cross-linking modified coefficient of friction of A-151 is simultaneously little to the sensitivity of sliding speed, either low speed or height
When A-151 consumption is more than 0.2%, the increase change of the friction coefficient dosage of crosslinking agent of material is not very greatly to speed, this
Point is different with DTBP modified UHMWPE.
Under different sliding types, the trend that the friction coefficient dosage of crosslinking agent of UHMWPE changes and changes is identical
, that is, with the increase of dosage of crosslinking agent, coefficient of friction is in first to reduce the trend increasing afterwards.Taking under reciprocal friction condition as a example,
When the consumption of DTBP and A-151 is 0.25% about, the coefficient of friction of material reaches minimum, respectively may be about 0.14 He
0.105, reduce about 26.3% and 44.9% than pure UHMWPE；After dosage of crosslinking agent is more than 0.25%, coefficient of friction is all with friendship
Join the increase of agent consumption and be gradually increased, but all little than the coefficient of friction of pure UHMWPE.This is due to for pure UHMWPE
For, under the conditions of low speed is to mill, uncrosslinked UHMWPE easily comes off in friction process and sticks together on mating plate, makes
Become result be UHMWPE and stratum disjunction to mill, coefficient of friction is larger；And the UHMWPE anti stickness ability through chemical crosslinking is strong,
Reduce the amount of sticking together in friction process, thus reducing coefficient of friction.
The same with coefficient of friction, under different sliding types, the specific wear rate of UHMWPE changes with dosage of crosslinking agent and becomes
The trend changed is identical, and that is, with the increase of dosage of crosslinking agent, specific wear rate is in first to reduce the trend increasing afterwards, and chemistry is handed over
The specific wear rate of the UHMWPE of connection all will be low than pure UHMWPE, and explanation cross-linking agent carries out to UHMWPE being chemically crosslinked energy
It is obviously improved the wearability of UHMWPE.
Equally and as a example reciprocating friction, wherein, for two kinds of cross-linking agent, when consumption is less than 0.45%, super high molecular weight
The specific wear rate of polyethylene all reduces with the increase of dosage of crosslinking agent, and work as consumption be more than 0.45% after, UHMWPE's is wear-resisting
Property is then all deteriorated with the increase of dosage of crosslinking agent；It is chemically crosslinked the resistance to of UHMWPE with DTBP and A-151 of 0.4%-0.45%
Preferably, after crosslinking, the specific wear rate of material reduces about 60.9% and 82.04% it can be deduced that using 0.4%- to mill property respectively
The wearability of the chemical crosslinking modified UHMWPE of 0.45%A-151 is optimum.This is because, in friction process, pure UHMWPE exists
Under external force effect, there is sliding because adhesion is weaker in strand, is rubbed due to continuous, and the continuous stress of molecule leads to
The formation transfer membrane transferring on mating plate of coming off of matrix material, material is thus formed ultra-high molecular weight polyethylene and transfer
Intermembranous friction behavior, with the carrying out of friction, the amount of transfer membrane can gradually increase, the increase of the wear extent of material；And it is appropriate
, due to crosslinked action, the adhesion of UHMWPE molecule interchain is bigger than uncrosslinked UHMWPE, is difficult shape for UHMWPE after crosslinking
Become sliding, coming off of friction process UHMWPE is inconspicuous, the amount forming transfer membrane is also less, and whole friction process is mainly right
Friction between couple and UHMWPE, does not have obvious UHMWPE and shifts intermembranous friction behavior, so the wear extent of material
Less.After dosage of crosslinking agent is more than 0.45%, specific wear rate increases and is likely due to have exceeded the crosslinked scope of appropriateness and causes portion
Excessively crosslinking is divided to cause.Likewise, silane crosslinker A-151 the wear-resisting modified effect of UHMWPE is better than peroxyde crosslinked
Agent DTBP.
Crosslinked post-consumer polymer shows as based on fatigue wear and has slight abrasive wear.This is crosslinked with polymer
Close, after crosslinking, matrix material is difficult for drop-off, and friction process is the friction of mating plate and UHMWPE all the time, and therefore ploughing phenomena is several
Be not in；After chemical crosslinking, UHMWPE is by based on the fatigue wear becoming based on original abrasive wear later, so
Wearability is improved.
All there is raising by a small margin with the tensile strength that DTBP is chemically crosslinked UHMWPE than pure UHMWPE, when DTBP's
When consumption is 0.6%, UHMWPE is 21.8MPa, improves 12% than pure UHMWPE；And it is chemically crosslinked UHMWPE with A-151, when
When A-151 content is 0.6% and 0.8%, the purer UHMWPE of tensile strength of crosslinked UHMWPE has and reduces by a small margin, respectively
18.9MPa and 18.7MPa.Show, for the tensile strength improving UHMWPE, to be handed over peroxyde crosslinked dose of DTBP chemistry
Connection UHMWPE is better than the effect that silane crosslinker A-151 is chemically crosslinked UHMWPE.The mechanical property of UHMWPE mainly by
The internal structure of UHMWPE determines, after chemical crosslinking, the tensile strength of UHMWPE does not significantly change and is likely due to
After chemical crosslinking, the structure of UHMWPE is not destroyed, or only fraction is destroyed, so it is original anti-to maintain material
Tensile strength., UHMWPE gel content is linear with dosage of crosslinking agent, illustrate the degree of cross linking be as cross-linking agent proportion plus
Improve greatly.This is because, the degree of cross linking is the degree of the strand crosslinking it is clear that after cross-linking agent increases, reaction
In active group naturally increase, so cause more molecule chain formation free states and participate in cross-linking reactions.But UHMWPE
Coefficient of friction and wearability not linear with the degree of cross linking, this explanation wearability be to reach in the range of the suitable degree of cross linking
To optimum, it is not that simply the degree of cross linking is bigger, wearability is better.
Claims (5)
1. a kind of preparation method of ultra-high molecular weight polyethylene composite material is it is characterised in that comprise the steps：
（1）Weigh dried UHMWPE to heat while stirring on temperature constant magnetic stirring machine, add cross-linking agent, cross-linking agent is used
Dehydrated alcohol dilutes, and heating-up temperature is 60 DEG C, stops heating after dehydrated alcohol evaporation completely, standby；
（2）Weigh 15-20g step（1）Mixed material loads in grinding tool, carries out precompressed, and pressure is 6MPa, and the dwell time is
60s；
（3）The grinding tool pressing in advance is put in hot stove and is heated, after temperature is 135 DEG C, be incubated 20min at this temperature；
Again it is suppressed after 20min, this time pressure is 12MPa, the dwell time is 5min；
（4）Subsequently again grinding tool is put into heating in hot stove, be incubated 30min at 205 DEG C；
（5）Last write compacting it is carried out with last 12MPa pressure, the then demoulding completes to prepare.
2. ultra-high molecular weight polyethylene composite material according to claim 1 preparation method it is characterised in that：Described
The baking temperature of UHMWPE is 90 DEG C, and drying time is 12h.
3. ultra-high molecular weight polyethylene composite material according to claim 1 preparation method it is characterised in that：Described friendship
Connection agent is silane crosslinker.
4. ultra-high molecular weight polyethylene composite material according to claim 1 preparation method it is characterised in that：Described de-
It is placed on heating 24h in 95 DEG C of water-bath after mould.
5. ultra-high molecular weight polyethylene composite material according to claim 1 preparation method it is characterised in that：Described guarantor
Pressure time 5min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698747A (en) * | 2019-10-10 | 2020-01-17 | 扬中市长龙管业有限公司 | Creep-resistant impact-resistant PE pipe and production method thereof |
-
2016
- 2016-12-05 CN CN201611105381.5A patent/CN106479027A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698747A (en) * | 2019-10-10 | 2020-01-17 | 扬中市长龙管业有限公司 | Creep-resistant impact-resistant PE pipe and production method thereof |
| CN110698747B (en) * | 2019-10-10 | 2021-12-31 | 扬中市长龙管业有限公司 | Creep-resistant impact-resistant PE pipe and production method thereof |
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Application publication date: 20170308 |