CN106596624A - Fractional crystallization analysis method of polyolefin resin - Google Patents
Fractional crystallization analysis method of polyolefin resin Download PDFInfo
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Abstract
The invention provides a fractional crystallization analysis method of polyolefin resin. The method comprises steps as follows: polyolefin resin is placed in a crucible of a differential scanning calorimeter, heated to 48-52 DEG C and kept at the constant temperature for 1-5 min; a product is heated to 210-230 DEG C, kept at the constant temperature for 4-10 min, cooled to 160-170 DEG C and kept at the constant temperature for 60-100 min; the product is cooled to 48-52 DEG C; the product is heated to 145-150 DEG C, kept at the constant temperature for 30-120 min and cooled to 48-52 DEG C; the product is heated to 120-140 DEG C, kept at the constant temperature for 30-80 min, cooled to 48-52 DEG C and kept at the constant temperature for 1-5 min; the product is heated to 180-220 DEG C, the heat flow change is recorded, and a fusion curve is obtained. Firstly, the method doesn't require a large quantity of solvents and is lower in cost and environment-friendly; secondly, the selection accuracy of raw materials is greatly improved, the test time is shortened, and the test cost is reduced; thirdly, the method is simple and convenient to operate.
Description
Technical field
The present invention relates to fractional crystallization technical field, more particularly to a kind of fractional crystallization analysis method of vistanex.
Background technology
From early 1990s since Sony succeeds in developing lithium ion battery, lithium ion battery is with its energy density
It is high, have extended cycle life the electrical property excellent with voltage height etc. and obtain rapidly development.Have been widely used at present mobile phone,
The electronics fields such as portable computer, photographing unit, video camera, and application is still among constantly extension.Lithium-ion electric
Pond is made up of both positive and negative polarity, electrolyte and barrier film.Wherein, a critical function of barrier film is isolation both positive and negative polarity and prevents electricity in battery
Son is passed through, while can allow for passing through for ion, so as to complete during charge discharge lithium ion between both positive and negative polarity
Quick transmission.The quality of membrane properties directly affects the discharge capacity and service life cycle of battery, it is therefore desirable to every
The research and application of membrane material gives enough attention.
Lithium ion battery separator should meet following requirements：(1) with electronic isolation, it is ensured that the machinery of both positive and negative polarity every
From；(2) there are certain aperture and porosity, it is ensured that low resistance and high ionic conductivity, there is transmission well to lithium ion
Property；(3) because the solvent of electrolyte is highly polar organic compound, the necessary electrolyte resistance corrosion of barrier film has enough chemistry
And electrochemical stability；(4) it is good to the wellability of electrolyte and with enough imbibition moisture-retaining capacities；(5) with enough power
Performance, including puncture strength, tensile strength etc., but thickness is as little as possible；(5) spatial stability and planarization are good；(6) heat is steady
It is qualitative and to automatically shut down protective value good.
Polyolefine material have excellent mechanical property, chemical stability and it is relatively inexpensive the characteristics of, it is therefore polyethylene, poly-
The microporous polyolefin film such as propylene are just used as lithium ion battery separator in Study on Li-ion batteries initial stage of development.Although in recent years
There is research other materials to prepare lithium ion battery separator, such as Boudin F adopt phase inversion with Kynoar (PVDF)
Lithium ion battery separator is prepared for bulk polymer.Kuribayashi etc. study cellulose composite membrane as lithium ion battery every
Membrane material.However, so far commercial lithium-ion batteries diaphragm material still mainly adopts polyethylene, microporous polypropylene membrane.Polyolefin
Molecular weight distribution, molecular size range, length of a chain-ordering of raw material etc. can all affect its crystal property and in outside shadow
Alignment capability under ringing, but crystallization and orientation play an important role in the preparation engineering of lithium ion battery microporous membrane,
Therefore the lithium ion battery separator for selecting suitable polyolefin raw material excellent for processability is most important.
It is that temperature rising elution is classified (TREF) method to characterize polypropylene isotacticity most common method at present, and this method needs to expend
A large amount of solvents, it is very uneconomical and and solvent to environment.(also referred to as hot point conventional of stepwise isothermal crystallization (SIC) method
Level method) will sample melting after staged lower the temperature step by step, every one-level thermostatic crystallize certain hour, then with certain liter
(5 DEG C/min) intensifications of warm speed, by the sample melting of crystallization, obtain the melting curve containing multiple endothermic peaks, multiple endothermic peaks
Temperature range and its peak area can be used for the distribution of crystallizable sequence length in relatively strand, and then investigate impact knot
Distribution of the brilliant comonomer on strand.The method can analyze distribution of the comonomer of crystallization on strand, a side
The result that time-consuming longer and more complicated for the crystallization behavior polyolefin in face, such as polypropylene etc. draw is more complicated, for preparation
The polyolefinic selection of lithium ion battery microporous membrane is inconvenient, and result is unable to accurate response lithium ion battery polyolefin original
The key performance of material.
The content of the invention
Present invention solves the technical problem that be the fractional crystallization analysis method that a kind of vistanex is provided, with operation
Simply, quick and precisely the characteristics of.
In view of this, the invention provides a kind of fractional crystallization analysis method of vistanex, comprises the following steps：Step
Suddenly a) in N2Under protection, vistanex is placed in the crucible of differential scanning calorimeter, is warming up to 48-52 DEG C, be incubated 1-
5min；Step b) is warming up to 210-230 DEG C of insulation 4-10min, is cooled to 160-170 DEG C of insulation 60-100min；Step c) lowers the temperature
To 48-52 DEG C；Step d) is warmed up to 145-150 DEG C, is incubated 30-120min, then cools to 48-52 DEG C；Step e) is warmed up to
120-140 DEG C, 30-80min is incubated, is then cooled to 48-52 DEG C, be incubated 1-5min；Step f) is warmed up to 180-220 DEG C, note
Record changes of heat flux, obtains melting curve.
Preferably, in step a, warming temperature is 50 DEG C, and temperature retention time is 2min.
Preferably, in step b, warming temperature is 220 DEG C, and temperature retention time is 6min.
Preferably, in step b, programming rate is 8-12 DEG C/min.
Preferably, in step b, cooling temperature is 165 DEG C, and temperature retention time is 80min.
Preferably, in step b, cooling rate is 8-12 DEG C/min.
Preferably, in step c, cooling temperature is 50 DEG C, and cooling rate is 50 DEG C/min.
Preferably, in step d, warming temperature is 148 DEG C, and temperature retention time is 60min.
Preferably, in step e, warming temperature is 130 DEG C, and temperature retention time is 40min.
Preferably, in step f, warming temperature is 200 DEG C, and programming rate is 4-8 DEG C/min.
The invention provides a kind of fractional crystallization analysis method of vistanex, comprises the following steps：In N2Under protection,
Vistanex is placed in the crucible of differential scanning calorimeter, 48-52 DEG C is warming up to, 1-5min is incubated；It is warming up to 210-230
DEG C insulation 4-10min, be cooled to 160-170 DEG C insulation 60-100min；It is cooled to 48-52 DEG C；145-150 DEG C is warmed up to, insulation
30-120min, then cools to 48-52 DEG C；120-140 DEG C is warmed up to, 30-80min is incubated, 48-52 DEG C is then cooled to, is protected
Warm 1-5min；180-220 DEG C is warmed up to, changes of heat flux is recorded, melting curve is obtained.Compared with prior art, the present invention need not
Expend a large amount of solvents, cost is relatively low and environmental friendliness.Second, the present invention is former for lithium ion battery microporous membrane polyolefin is affected
The crucial crystalline fusion peak dot of material more can accurate standard, greatly improve the selection accuracy to raw material, reduce point
The time of analysis and cost.3rd, the present invention is simple, convenient, and the raw material for selecting is high with barrier film preparation technology matching degree, full
The test request that foot is stably produced.Using the analysis method of the present invention, characteristic temperature is for formulation lithium ion battery micropore
Film polyolefinic raw materials model has directive significance.
Description of the drawings
Fig. 1 is the scanning electron microscopic picture of the microporous membrane prepared as raw material with polypropylene -1；
Fig. 2 is the scanning electron microscopic picture of the microporous membrane prepared as raw material with polypropylene -2.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, but
It should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention, rather than to the claims in the present invention
Limit.
The embodiment of the invention discloses a kind of fractional crystallization analysis method of vistanex, comprises the following steps：Step
A) in N2Under protection, vistanex is placed in the crucible of differential scanning calorimeter, is warming up to 48-52 DEG C, be incubated 1-5min；
Step b) is warming up to 210-230 DEG C of insulation 4-10min, is cooled to 160-170 DEG C of insulation 60-100min；Step c) is cooled to 48-
52℃；Step d) is warmed up to 145-150 DEG C, is incubated 30-120min, then cools to 48-52 DEG C；Step e) is warmed up to 120-
140 DEG C, 30-80min is incubated, is then cooled to 48-52 DEG C, be incubated 1-5min；Step f) is warmed up to 180-220 DEG C, record heat
Rheology, obtains melting curve.
Using the principle for progressively cooling down stretching during produce reality with reference to lithium-ion membrane of the invention, lithium ion is obtained
The analysis method of battery microporous membrane polyolefinic raw materials.The method is monitored to the key temperatures point of polyolefinic raw materials, simple,
It is easy to operate, and can accurately select the polyolefin raw material for being adapted to prepare lithium ion battery microporous membrane.The method that the present invention is provided
Can filter out and fit through melting extrusion pulling method and calorific value phase separation method prepares lithium ion battery microporous membrane raw material, set up
The raw material model data of fractional crystallization.
Preferably, before testing vistanex, further preferably differential scanning calorimeter is carried out pre-
Heat, is preferably 20-60min, more preferably 30min preheating time.In whole test process, N is preferably passed through always2Protection.
Preferably, in step a, warming temperature is preferably 50 DEG C, and temperature retention time is preferably 2min.
Preferably, in step b, warming temperature is preferably 220 DEG C, and temperature retention time is preferably 6min；Programming rate
Preferably 8-12 DEG C/min, more preferably 10 DEG C/min；Cooling temperature is preferably 165 DEG C, and temperature retention time is preferably 80min；Drop
Warm speed is preferably 8-12 DEG C/min, more preferably 10 DEG C/min.By vistanex being warming up to into 210-230 DEG C and being protected
Temperature, to eliminate the thermal history of sample.
Preferably, in step c, cooling temperature is preferably 50 DEG C, and cooling rate is preferably 50 DEG C/min.
Preferably, in step d, warming temperature is preferably 148 DEG C, and temperature retention time is preferably 60min；Cooling temperature
Preferably 50 DEG C, cooling rate is preferably 50 DEG C/min.
Preferably, in step e, warming temperature is preferably 130 DEG C, and temperature retention time is preferably 40min；Cooling temperature
Preferably 50 DEG C, cooling rate is preferably 50 DEG C/min, and the temperature retention time after cooling is preferably 1-5min, more preferably 2min.
Preferably, in step f, warming temperature is preferably 200 DEG C, and programming rate is preferably 4-8 DEG C/min, more excellent
Elect 5 DEG C/min as.
From above scheme as can be seen that the fractional crystallization analysis method that the present invention is provided characterizes polypropylene etc. relative to tradition
Normality selects temperature rising elution classification (TREF) method of lithium ion battery microporous membrane polyolefinic raw materials, expends a large amount of molten without needs
Agent, cost is relatively low and environmental friendliness；Second, the fractional crystallization analysis method that the present invention is provided is relative to traditional gradient crystallization point
Analysis method, for affect lithium ion battery microporous membrane polyolefin raw material crucial crystalline fusion peak dot more can accurate standard, pole
The big time and the cost that improve the selection accuracy to raw material, reduce test；3rd, the classification knot that the present invention is provided
Brilliant analysis method is simple, convenient, and the raw material for selecting is high with barrier film preparation technology matching degree, what satisfaction was stably produced
Test request.4th, using the analysis method of the present invention, characteristic temperature is former for lithium ion battery microporous membrane polyolefin is formulated
Material model has directive significance.
For a further understanding of the present invention, the technical scheme that the present invention is provided is carried out specifically with reference to embodiment
Bright, protection scope of the present invention is not limited by the following examples.
Embodiment 1
The present embodiment provides a kind of fractional crystallization analysis method of vistanex, and test raw material (meets for polypropylene -1
Prepare the requirement of qualified lithium ion battery microporous membrane), comprise the following steps that：
1st, differential scanning calorimeter start preheating 30min, by test sample 5mg test crucible, whole test process are put into
In be passed through N always2Protection；
2nd, 50 DEG C of constant temperature 2min；
3rd, with 10 DEG C/min constant heatingrates to 220 DEG C, and constant temperature 6min, eliminate the thermal history of sample；
4th, 165 DEG C, and constant temperature 80min are cooled to 10 DEG C/min constant speed；
5th, 50 DEG C are cooled to 50 DEG C/min constant speed；
6th, with 10 DEG C/min constant heatingrates to 148 DEG C, and constant temperature 60min；
7th, 50 DEG C are cooled to 50 DEG C/min constant speed；
8th, with 10 DEG C/min constant heatingrates to 130 DEG C, and constant temperature 40min；
9th, 50 DEG C are cooled to 10 DEG C/min constant speed；
10th, it is incubated 2min at 50 DEG C；
11st, with 5 DEG C/min constant heatingrates to 200 DEG C, and changes of heat flux is recorded, obtains melting curve.
Embodiment 2
The present embodiment provides a kind of fractional crystallization analysis method of vistanex, and step is same as Example 1, and difference is
Test raw material is polypropylene -2.
Embodiment 3
The present embodiment provides a kind of fractional crystallization analysis method of vistanex, and step is same as Example 1, and difference is
Test raw material is polypropylene -3.
Embodiment 4
The present embodiment provides a kind of fractional crystallization analysis method of vistanex, testing procedure J substantially with the phase of embodiment 1
Together, difference is that the programming rate of the 9th step is changed to 2 DEG C/min.
Comparative example 1
This comparative example provides a kind of conventional stepwise isothermal crystallization (SIC) method, and its body material (meets system for polypropylene -1
The requirement of standby qualified lithium ion battery microporous membrane), testing procedure is as follows：
1st, differential scanning calorimeter start preheating 30min, by test sample 5mg test crucible, whole test process are put into
In be passed through N always2Protection；
2nd, furnace temperature is risen to into 230 DEG C with the heating rate of 10 DEG C/min, keeps 5min, eliminate the thermal history of sample；
3rd, 178 DEG C, after constant temperature 4h are cooled to the speed of 40 DEG C/min, successively respectively at 165 DEG C, 160 DEG C, 155 DEG C,
150 DEG C, 145 DEG C, constant temperature 4h at 140 DEG C；
4th, it is cooled to 2O DEG C with the speed of 10 DEG C/min；
5th, with the ramp of 5 DEG C/min to 200 DEG C, and changes of heat flux is recorded, obtains melting curve.
Comparative example 2
This comparative example provides a kind of conventional stepwise isothermal crystallization (SIC) method, and method of testing is substantially the same manner as Example 1,
Difference is that raw material is changed to polypropylene -2.
Comparative example 3
This comparative example provides a kind of conventional stepwise isothermal crystallization (SIC) method, and method of testing is substantially the same manner as Example 1,
It is polypropylene -3 that difference is raw material.
The fractional crystallization test result of embodiment and comparative example is listed in Table 1 below.
The fractional crystallization test result of the embodiment of table 1 and comparative example
As shown in Table 1, the fractional crystallization analysis method used time that the present invention is provided significantly reduces, and to being adapted to lithium-ion electric
The melting swarming of pond microporous membrane polypropylene material is more accurate, is easy to quickly select aborning, makes beneficial in actual production
With.
Polypropylene -1 with embodiment 1 prepares microporous membrane as raw material using melting extrusion pulling method；With the poly- of embodiment 2
Propylene -2 is raw material, and using melting extrusion pulling method preparation microporous membrane is prepared.It is scanned Electronic Speculum point to above-mentioned microporous membrane respectively
Analysis, as shown in Figure 1.Knowable to the scanning electron microscope comparison diagram in Fig. 1, the different pp material of swarming under existing process, into
The obvious differences such as permeability, the uniformity in hole.
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen in the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (10)
1. the fractional crystallization analysis method of a kind of vistanex, it is characterised in that comprise the following steps：
Step a) is in N2Under protection, vistanex is placed in the crucible of differential scanning calorimeter, is warming up to 48-52 DEG C, insulation
1-5min；
Step b) is warming up to 210-230 DEG C of insulation 4-10min, is cooled to 160-170 DEG C of insulation 60-100min；
Step c) is cooled to 48-52 DEG C；
Step d) is warmed up to 145-150 DEG C, is incubated 30-120min, then cools to 48-52 DEG C；
Step e) is warmed up to 120-140 DEG C, is incubated 30-80min, is then cooled to 48-52 DEG C, is incubated 1-5min；
Step f) is warmed up to 180-220 DEG C, records changes of heat flux, obtains melting curve.
2. fractional crystallization analysis method according to claim 1, it is characterised in that in step a, warming temperature is 50 DEG C,
Temperature retention time is 2min.
3. fractional crystallization analysis method according to claim 1, it is characterised in that in step b, warming temperature is 220 DEG C,
Temperature retention time is 6min.
4. fractional crystallization analysis method according to claim 1, it is characterised in that in step b, programming rate is 8-12
℃/min。
5. fractional crystallization analysis method according to claim 1, it is characterised in that in step b, cooling temperature is 165 DEG C,
Temperature retention time is 80min.
6. fractional crystallization analysis method according to claim 1, it is characterised in that in step b, cooling rate is 8-12
℃/min。
7. fractional crystallization analysis method according to claim 1, it is characterised in that in step c, cooling temperature is 50 DEG C,
Cooling rate is 50 DEG C/min.
8. fractional crystallization analysis method according to claim 1, it is characterised in that in step d, warming temperature is 148 DEG C,
Temperature retention time is 60min.
9. fractional crystallization analysis method according to claim 1, it is characterised in that in step e, warming temperature is 130 DEG C,
Temperature retention time is 40min.
10. fractional crystallization analysis method according to claim 1, it is characterised in that in step f, warming temperature is 200
DEG C, programming rate is 4-8 DEG C/min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109725020A (en) * | 2018-11-21 | 2019-05-07 | 北方华锦化学工业股份有限公司 | A kind of fractional crystallization method of polypropylene lithium battery diaphragm PP Pipe Compound |
| CN111098533A (en) * | 2019-12-31 | 2020-05-05 | 武汉中兴创新材料技术有限公司 | Preparation method of hard elastic polypropylene film, hard elastic polypropylene film and application |
| CN112649319A (en) * | 2020-01-16 | 2021-04-13 | 宁波杉杉新材料科技有限公司 | Analysis method for evaluating quality of coke raw material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101558116A (en) * | 2006-12-15 | 2009-10-14 | 住友化学株式会社 | Polypropylene resin composition |
| CN101585944A (en) * | 2008-05-23 | 2009-11-25 | 住友化学株式会社 | Polypropylene-based resin composition and film |
| CN102156147A (en) * | 2011-03-07 | 2011-08-17 | 四川大学 | Method for detecting film forming stability of polypropylene in bidirectional stretching by using thermal analysis method |
| CN102954980A (en) * | 2011-08-19 | 2013-03-06 | 中国石油天然气股份有限公司 | Method for rapidly detecting polyethylene tube special-purposed material grade |
| CN103454303A (en) * | 2012-06-01 | 2013-12-18 | 中国石油天然气股份有限公司 | Rapid method for evaluating processing linear velocity of special-purpose material for biaxially oriented polypropylene |
-
2016
- 2016-12-21 CN CN201611189106.6A patent/CN106596624A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101558116A (en) * | 2006-12-15 | 2009-10-14 | 住友化学株式会社 | Polypropylene resin composition |
| CN101585944A (en) * | 2008-05-23 | 2009-11-25 | 住友化学株式会社 | Polypropylene-based resin composition and film |
| CN102156147A (en) * | 2011-03-07 | 2011-08-17 | 四川大学 | Method for detecting film forming stability of polypropylene in bidirectional stretching by using thermal analysis method |
| CN102954980A (en) * | 2011-08-19 | 2013-03-06 | 中国石油天然气股份有限公司 | Method for rapidly detecting polyethylene tube special-purposed material grade |
| CN103454303A (en) * | 2012-06-01 | 2013-12-18 | 中国石油天然气股份有限公司 | Rapid method for evaluating processing linear velocity of special-purpose material for biaxially oriented polypropylene |
Non-Patent Citations (1)
| Title |
|---|
| 亢健 等: "连续自成核退火热分级技术在分析聚丙烯缺陷结构的分布中的应用及优化", 《高分子通报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109725020A (en) * | 2018-11-21 | 2019-05-07 | 北方华锦化学工业股份有限公司 | A kind of fractional crystallization method of polypropylene lithium battery diaphragm PP Pipe Compound |
| CN111098533A (en) * | 2019-12-31 | 2020-05-05 | 武汉中兴创新材料技术有限公司 | Preparation method of hard elastic polypropylene film, hard elastic polypropylene film and application |
| CN111098533B (en) * | 2019-12-31 | 2022-06-10 | 武汉中兴创新材料技术有限公司 | Preparation method of hard elastic polypropylene film, hard elastic polypropylene film and application |
| CN112649319A (en) * | 2020-01-16 | 2021-04-13 | 宁波杉杉新材料科技有限公司 | Analysis method for evaluating quality of coke raw material |
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