CN105372156A - Method for testing and evaluation of resin lubricating properties of polyvinyl chloride lubricant - Google Patents
Method for testing and evaluation of resin lubricating properties of polyvinyl chloride lubricant Download PDFInfo
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- CN105372156A CN105372156A CN201510793632.2A CN201510793632A CN105372156A CN 105372156 A CN105372156 A CN 105372156A CN 201510793632 A CN201510793632 A CN 201510793632A CN 105372156 A CN105372156 A CN 105372156A
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Abstract
The present invention relates to a method for testing and evaluation of resin lubricating properties of a polyvinyl chloride lubricant, and belongs to the technical field of chemical industry; the specific steps are as follows: (1) polyvinyl chloride resin and a heat stabilizer are uniformly kneaded in a mixer to prepare a mixture; (2) the polyvinyl chloride resin, the heat stabilizer and a lubricant are uniformly kneaded in a mixer to prepare a mixture; (3) the mixtures are blended with a torque rheometer mixer, a flow curve is recorded, and the plasticizing time is read from the flow curve; and (4) the resin lubricating properties of the polyvinyl chloride lubricant can be evaluated by comprehensive comparison of PVC (polyvinyl chloride) plasticizing time influence degree of the lubricant when the lubricant is used alone and the effect types (such as additive effect, synergies or confrontation effect) and strong and weak degree of the lubricant when the lubricant is used simultaneously with a high performance main effect resin outer lubricant. The method can determine the resin lubricating properties of the polyvinyl chloride lubricant, also can distinguish whether the properties are high or low, is simple and feasible and are accurate and reliable in results.
Description
Technical field
The present invention relates to a kind of test evaluation method of PVC STABILIZERS/LUBRICANTS resin lubrication performance, be specifically related to a kind of torque rheometer measure lubricant be used alone and with high-performance main effect resin external lubricant and with on the impact of PVC plastic time to evaluate the method for its resin lubrication performance, belong to technical field of chemical industry.
Background technology
Polyvinylchloride (PVC) is one of five large general-purpose plastics, have intensity high, can plasticising, corrosion-resistant, difficult combustion, good insulating, transparent advantages of higher, its goods tool has been widely used.But, PVC due to polarity stronger, its each hierarchical structure unit (comprising each level particle and molecule) and all have stronger interaction and friction force between they and process equipment metal surface, therefore exists that melt viscosity is high, material cutting frictional heat large and melt adheres to the processability problems such as serious to process equipment metal surface.These processability problems and the processing of PVC extremely difficult thermoplastic is caused to thermally labile superposition.Therefore, thermoplastic processing to be carried out to PVC, except must using thermal stabilizer, also must make with lubricator simultaneously.At present, market having the type of lubricant such as fatty acid, metallic soap, carboxylate, fatty acid amide, fatty alcohol and chloroflo can for selecting.It's a pity, due to also very abundant to the understanding of the characteristic of these lubricants and action principle, until current, in PVC processing lubricant be applied in be still to a great extent experimental.System according to the author is investigated, this is mainly multi-functional owing to PVC lubricant, with regard to having recognized that at present, comprise metal lubrication (being commonly referred to the demoulding) and resin lubrication, and resin lubrication comprises interior lubrication, outer lubrication and auxiliary outer lubrication, and current not yet foundation can effectively distinguish these functions and the test evaluation method evaluating its power.
In PVC lubricant, some kinds can be dissolved in PVC melt at the process conditions thus have the effect weakening PVC inter-molecular attraction in melt, and lubrication in this effect and resin, has lubricant and the resin internal lubricant of this function; Some kinds are insoluble to PVC melt at the process conditions but can sprawl at PVC particle surface the effect thus having and reduce PVC interparticle attraction, and this effect and the outer lubrication of main effect resin, have lubricant and the main effect resin external lubricant of this function; And some kinds are both not obvious to have in resin that lubrication is also not obvious has the outer lubrication of main effect resin, but there is the collaborative effect strengthening main effect resin external lubricant performance, this effect and the outer lubrication of assisted resin, have lubricant and the assisted resin external lubricant of this function.
Obviously, set up test evaluation method with differentiate different PVC lubricant the actual resin lubrication function that has to distinguish its performance strong and weak, for the research of PVC lubricant, development and application, there is basic meaning.It's a pity, there is not yet relevant report so far.
Summary of the invention
Object of the present invention is intended to overcome the deficiencies in the prior art, there is provided a kind of torque rheometer to measure lubricant to be used alone and with high-performance main effect resin external lubricant and with the impact on the PVC plastic time, to differentiate its resin lubrication function and to distinguish the method for its performance height.
To achieve these goals, the technical solution adopted in the present invention is:
A test evaluation method for PVC STABILIZERS/LUBRICANTS resin lubrication performance, comprises the steps:
(1) blank mixing material preparation: Corvic, thermal stabilizer are mediated in mixer evenly, be mixed with mixing material;
(2) prepare containing lubricant mixing material: Corvic, thermal stabilizer and lubricant are mediated in mixer evenly, be mixed with mixing material;
(3) mixing material fusion time measures: with the mixing mixing material of mixer of torque rheometer, recorded stream varied curve, reads fusion time by rheological curve;
(4) lubricant resin lubrication performance evaluation: the fusion time containing lubricant mixing material and blank mixing material recorded more under the same conditions, differentiates the resin lubrication function of lubricant as follows and distinguishes its performance power:
the fusion time of PVC can be extended and with high-performance main effect resin external lubricant and the impact of used time on the PVC plastic time has additive effect (two components performance be greater than the performance sum that they are used alone separately) person is main effect resin external lubricant, it is higher to extend PVC plastic time more remarkable then performance when being used alone when being used alone;
When being 2. used alone on the impact of the fusion time of PVC not obvious but and high-performance main effect resin external lubricant the impact of used time on the PVC plastic time to have cooperative effect (two components performance be greater than the performance sum that they are used alone separately) person be assisted resin external lubricant, with high-performance main effect resin external lubricant and the stronger then performance of cooperative effect higher;
be used alone not obvious on the impact of the fusion time of PVC but and high-performance main effect resin external lubricant the impact of used time on the PVC plastic time have antagonistic effect (namely two components and performance be less than the performance sum that they are used alone separately) person is resin internal lubricant, with high-performance main effect resin external lubricant and the stronger then performance of antagonistic effect higher.
The mixing mixing material of described torque rheometer mixer, condition is mixer temperature 160 ~ 220 DEG C, rotor speed 10 ~ 80rpm, is preferably mixer temperature 180 ~ 200 DEG C, rotor speed 30 ~ 60rpm; Described high-performance main effect resin external lubricant is High performance polyolefin wax lubricant, high-performance pertroleum wax lubricant or high-performance synthesis paraffin wax lubricants.
the present invention relative to the beneficial effect of prior art is:
Establish by measuring lubricant with torque rheometer and be used alone and with high-performance main effect resin external lubricant and with the impact on the PVC plastic time, and Integrated comparative its when being used alone to the degree of PVC plastic time effects and and high-performance main effect resin external lubricant and by the type (additive effect, cooperative effect or antagonistic effect) of effect and power, to differentiate that its resin lubrication function can distinguish again its performance PVC lubricant resin lubrication performance system test evaluation method just.
figure of description
Several typical resins lubricant of Fig. 1 is used alone and with A-C617A and with the impact on the PVC plastic time, the corresponding lubricant of curve from top to bottom: nothing, 0.8phrGMS, 0.8phrHSt, 5phrGMS, 5phrHSt;
Fig. 2 containing lubricant and respectively containing the torque rheological curve of PVC mixing material of GMS and HSt, Δ
t f=
t f (containing lubricant mixing material)-
t f (blank mixing material), the from top to bottom corresponding lubricant (A+B) of curve: (MgSt
2+ A-C617A), (CaSt
2+ A-C617A), (A-C617A+A-C617A), (A-C6+A-C617A), (without+A-C617A), (GMS+A-C617A), (HSt+A-C617A), corresponding total consumption/phr:0.8,0.8,0.8,0.8,0.8
ω(B), 0.8,0.8.
Embodiment
Be described in further details the present invention below by embodiment, these embodiments are only used for the present invention is described, do not limit the scope of the invention.
embodiment 1
A method for test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance, comprises the steps:
(1) blank mixing material preparation: by 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer mediate evenly in high speed Universalpulverizer, is mixed with mixing material;
(2) prepare containing lubricant mixing material: by 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer mediate evenly with A-C617A and the A-C6A potpourri of 0.8phr Tissuemat E A-C617A, A-C6A and different proportion respectively in high speed Universalpulverizer, is mixed with mixing material;
(3) mixing material fusion time measures: the mixer of use torque rheometer under temperature 190 DEG C, rotor speed 45rpm condition, distinguish mixing blank and containing lubricant mixing material, recorded stream varied curve, reads fusion time by rheological curve;
(4) lubricant resin lubrication performance evaluation: the fusion time containing lubricant mixing material and blank mixing material recorded more under the same conditions, differentiates the resin lubrication function of lubricant as follows and distinguishes its performance power:
the fusion time of PVC can be extended and with Tissuemat E A-C617A and the impact of used time on the PVC plastic time presents in additive effect person is main effect resin external lubricant, it is higher to extend PVC plastic time more remarkable then performance when being used alone when being used alone;
Not obvious but present cooperative effect person for assisted resin external lubricant with Tissuemat E A-C617A the impact of used time on the PVC plastic time on the impact of the fusion time of PVC when being 2. used alone, with Tissuemat E A-C617A and the stronger then performance of cooperative effect higher;
be used alone not obvious on the impact of the fusion time of PVC but present antagonistic effect person for resin internal lubricant with Tissuemat E A-C617A the impact of used time on the PVC plastic time, with Tissuemat E A-C617A and the stronger then performance of antagonistic effect higher.
Test result is shown in Fig. 1 and table 1.
embodiment 2
A method for test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance, substantially the same manner as Example 1, difference is to change into containing the preparation of lubricant mixing material:
By 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer respectively with 0.8phr Tissuemat E A-C617A, calcium stearate (CaSt
2) and A-C617A and CaSt of different proportion
2potpourri is mediated evenly in high speed Universalpulverizer, is mixed with mixing material.
Test result is shown in Fig. 1 and table 1.
embodiment 3
A method for test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance, substantially the same manner as Example 1, difference is to change into containing the preparation of lubricant mixing material:
By 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer respectively with 0.8phr Tissuemat E A-C617A, dolomol (MgSt
2) and A-C617A and MgSt of different proportion
2potpourri is mediated evenly in high speed Universalpulverizer, is mixed with mixing material.
Test result is shown in Fig. 1 and table 1.
embodiment 4
A method for test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance, substantially the same manner as Example 1, difference is to change into containing the preparation of lubricant mixing material:
By 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer mediate evenly with A-C617A and the GMS potpourri of 0.8phr Tissuemat E A-C617A, glycerin monostearate (GMS) and different proportion respectively in high speed Universalpulverizer, is mixed with mixing material.
Test result is shown in Fig. 1 and table 1.
embodiment 5
A method for test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance, substantially the same manner as Example 1, difference is to change into containing the preparation of lubricant mixing material:
By 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer mediate evenly with A-C617A and the HSt potpourri of 0.8phr Tissuemat E A-C617A, stearic acid (HSt) and different proportion respectively in high speed Universalpulverizer, is mixed with mixing material.
Test result is shown in Fig. 1 and table 1.
comparative example
By comparing the method for greasy property in temperature of charge and moment of torsion evaluation PVC lubricant resin, comprise the steps:
(1) blank mixing material preparation: by 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer mediate evenly in high speed Universalpulverizer, is mixed with mixing material;
(2) prepare containing lubricant mixing material: by 100phr(mass parts) polyvinyl chloride resin, 1phr thiol methyl tin heat stabilizer and certain phr lubricant mediate evenly in high speed Universalpulverizer, is mixed with mixing material;
(3) mixing material rheological curve measures: the mixer of use torque rheometer is distinguished mixing blank and contains lubricant mixing material, recorded stream varied curve under temperature 190 DEG C, rotor speed 45rpm condition;
(4) Evaluation of Lubrication in lubricant resin: by the more mixing temperature containing material when lubricant mixing material and blank mixing material and moment of torsion evaluation, if containing lubricant mixing material compared with blank mixing material, temperature of charge and moment of torsion decline, then lubricant has lubricating function in resin, and the degree that temperature of charge and moment of torsion decline is larger, then in resin, greasy property is higher.
The blank mixing material recorded by comparative example method, see Fig. 2 containing 0.8phr, 5.0phrGMS mixing material and respectively containing 0.8phr, 5.0phrHSt mixing material rheological curve respectively.
Tissuemat E A-C6A and A-C617A is the famous brand high-performance main effect resin external lubricant that Honeywell Inc. produces, and wherein, A-C617A is the innovative product of A-C6A, has the outer greasy property of higher main effect resin.
CaSt
2and MgSt
2conventional assisted resin external lubricant, and by contrast, MgSt
2performance is higher.CaSt
2and MgSt
2stablize main effect resin external lubricant-PVC particle interface as surfactant by interfacial adsorption and play lubrication outside main effect resin.Why MgSt
2have and compare CaSt
2the outer greasy property of higher assisted resin is because both structures are similar, Mg
2+with Ca
2+though electric charge is identical but the former radius is less, therefore by contrast, MgSt
2polar head polarity is stronger, and surfactivity is also just stronger, more effectively can stablize main effect resin external lubricant-PVC particle interface.
GMS and HSt is conventional resin internal lubricant, and by contrast, HSt performance is higher.Resin internal lubricant, because weakening PVC inter-molecular attraction in melt, therefore not only has the effect promoting PVC plastic, also can reduce PVC melt viscosity simultaneously.Resin internal lubricant can reduce PVC melt viscosity and show in torque rheology characteristic, can reduce temperature of charge (because frictional heat reduces) and moment of torsion exactly.Obviously, reduce temperature of charge and torque degree larger, in the resin that lubricant is described, greasy property is higher.
As seen from Figure 2, with not containing lubricant blank PVC mixing material compared with, all decline containing the temperature of charge of the PVC mixing material of GMS and HSt and moment of torsion, show that GMS and HSt has lubrication in resin really.And also can be seen by Fig. 1, by measuring separately containing the torque rheology characteristic of the PVC mixing material of GMS and HSt, when consumption is when normal ranges (0.8phr), its performance difference effectively cannot be distinguished; Effectively will distinguish performance, consumption must bring up to unconventional scope.Relatively consumption is the torque rheology characteristic of the PVC mixing material containing GMS and HSt of 5phr, and can determine, HSt has greasy property in the resin higher than GMS.
Infer according to performance characteristics as above, if measure above-mentioned typical resins lubricant by the inventive method, following result should be obtained:
(1) Tissuemat E A-C617A and A-C6A is used alone the fusion time that can extend PVC, and with high-performance main effect resin external lubricant and with there is additive effect, and by contrast, the ability that A-C617A extends the PVC plastic time is better than A-C6A.
(2) CaSt
2and MgSt
2be used alone the fusion time impact of PVC not obvious, with high-performance main effect resin external lubricant and with having cooperative effect, and by contrast, MgSt
2caSt is better than with the cooperative effect of high-performance main effect resin external lubricant
2.
(3) GMS and HSt is used alone the fusion time impact of PVC not obvious, with high-performance main effect resin external lubricant and by the effect that creates antagonism (namely causing PVC plastic time shorten), and by contrast, the antagonistic effect of HSt and high-performance main effect resin external lubricant is better than GMS.
With embodiment 1 ~ embodiment 3 method measure several typical resins lubricant be used alone and with high-performance main effect resin external lubricant A-C617A and with to the PVC plastic time (
t f) impact result as shown in Figure 1.
According to the test result of Fig. 1, several typical resins lubricant and A-C617A by best and with than (mass ratio 1:4, have the strongest and by effect) and with to the concrete effect of PVC plastic time effects in table 1.
Δ
t f=
t f(containing lubricant mixing material)-
t f(blank mixing material)
Can be seen by Fig. 1 and table 1, test result and the above-mentioned supposition done according to performance characteristics just match.This just demonstrates the feasibility of the inventive method.
In addition, as previously mentioned, by measuring the impact on temperature of charge and moment of torsion of resin internal lubricant with torque rheometer, though also its function can be differentiated, to effectively distinguish its performance, but consumption must be brought up to unconventional scope.But, from Fig. 1 and table 1, if carry out test evaluation by the inventive method, then under conventional amount used condition, just not only can differentiate its function but also effectively distinguish its performance.Usually better can reflect the effect under actual processing conditions of tested object based on the test evaluation result obtained under conventional amount used condition, can think, new method has more science.
Why B component will adopt " high-performance " main effect resin external lubricant, because adopt " high-performance " main effect resin external lubricant can produce strong and use effect, is conducive to effectively distinguishing the resin lubrication function of different PVC lubricant and distinguishes its performance power.
Claims (4)
1. a method for test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance, is characterized in that, comprise the steps:
(1) blank mixing material preparation: Corvic, thermal stabilizer are mediated in mixer evenly, be mixed with mixing material;
(2) prepare containing lubricant mixing material: Corvic, thermal stabilizer and lubricant are mediated in mixer evenly, be mixed with mixing material;
(3) mixing material fusion time measures: with the mixing mixing material of mixer of torque rheometer, recorded stream varied curve, reads fusion time by rheological curve;
(4) lubricant resin lubrication performance evaluation: the fusion time containing lubricant mixing material and blank mixing material recorded more under the same conditions, differentiates the resin lubrication function of lubricant as follows and distinguishes its performance power:
the fusion time of PVC can be extended and with high-performance main effect resin external lubricant and the impact of used time on the PVC plastic time presents in additive effect person is main effect resin external lubricant, it is higher to extend PVC plastic time more remarkable then performance when being used alone when being used alone;
Not obvious but present cooperative effect person for assisted resin external lubricant with high-performance main effect resin external lubricant the impact of used time on the PVC plastic time on the impact of the fusion time of PVC when being 2. used alone, with high-performance main effect resin external lubricant and the stronger then performance of cooperative effect higher;
be used alone not obvious on the impact of the fusion time of PVC but present antagonistic effect person for resin internal lubricant with high-performance main effect resin external lubricant the impact of used time on the PVC plastic time, with high-performance main effect resin external lubricant and the stronger then performance of antagonistic effect higher.
2. the method for a kind of test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance according to claim 1, it is characterized in that: the mixing mixing material of step (2) described torque rheometer mixer, condition is mixer temperature 160 ~ 220 DEG C, rotor speed 10 ~ 80rpm.
3. the method for a kind of test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance according to claim 1 and 2, it is characterized in that: the mixing mixing material of step (2) described torque rheometer mixer, condition is mixer temperature 180 ~ 200 DEG C, rotor speed 30 ~ 60rpm.
4. the method for a kind of test evaluation PVC STABILIZERS/LUBRICANTS resin lubrication performance according to claim 1, is characterized in that: described high-performance main effect resin external lubricant is High performance polyolefin wax lubricant, high-performance pertroleum wax lubricant or high-performance synthesis paraffin wax lubricants.
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Cited By (5)
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| CN106093354A (en) * | 2016-07-05 | 2016-11-09 | 广东工业大学 | A kind of method of lubricant plate-out in test evaluation RPVC |
| CN109054237A (en) * | 2018-07-17 | 2018-12-21 | 广东工业大学 | A method of polyvinyl chloride melt adherency in cleaning torque rheometer mixer |
| CN109054251A (en) * | 2018-08-10 | 2018-12-21 | 广东工业大学 | A method of PVC STABILIZERS/LUBRICANTS pressure analysis adherency in cleaning torque rheometer mixer |
| CN109135113A (en) * | 2018-08-10 | 2019-01-04 | 广东工业大学 | A method of polyvinyl chloride melt adherency in cleaning torque rheometer mixer |
| CN109227993A (en) * | 2018-07-17 | 2019-01-18 | 广东工业大学 | A method of PVC STABILIZERS/LUBRICANTS pressure analysis adherency in cleaning torque rheometer mixer |
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| CN106093354A (en) * | 2016-07-05 | 2016-11-09 | 广东工业大学 | A kind of method of lubricant plate-out in test evaluation RPVC |
| CN109054237A (en) * | 2018-07-17 | 2018-12-21 | 广东工业大学 | A method of polyvinyl chloride melt adherency in cleaning torque rheometer mixer |
| CN109227993A (en) * | 2018-07-17 | 2019-01-18 | 广东工业大学 | A method of PVC STABILIZERS/LUBRICANTS pressure analysis adherency in cleaning torque rheometer mixer |
| CN109054237B (en) * | 2018-07-17 | 2021-02-19 | 广东工业大学 | Method for cleaning adhesion of polyvinyl chloride melt in mixer of torque rheometer |
| CN109054251A (en) * | 2018-08-10 | 2018-12-21 | 广东工业大学 | A method of PVC STABILIZERS/LUBRICANTS pressure analysis adherency in cleaning torque rheometer mixer |
| CN109135113A (en) * | 2018-08-10 | 2019-01-04 | 广东工业大学 | A method of polyvinyl chloride melt adherency in cleaning torque rheometer mixer |
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| CN105372156B (en) | 2018-09-25 |
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