News Details
Plastic antioxidant test
2018-1-11 11:20:43
Plastic antioxidant test
To evaluate the function of antioxidant in plastic materials or products, it is generally required to carry out plastic antioxidant test according to different formulation design, and compare and evaluate the experimental data of plastic antioxidant.
The design of plastic antioxidant test formula is as follows:
A. blank resin;
B. resin + antioxidant;
C. resin + light stabilizer;
D. Resin + antioxidant + light stabilizer;
To evaluate the function of antioxidants in plastic materials or products and select a and b combinations to carry out the test;
To evaluate the function of light stabilizer in plastic materials or products, and select a and c combination for testing;
To evaluate the comprehensive function of antioxidant and light stabilizer in plastic materials or products, and select a and d combinations to carry out the experiment.
There are five main test methods:
: (1). The oxidation induction period experiment on general plastic material, usually with Mr Bandt plasticizing instrument under nitrogen protection, mixing 10 min, and then to mold it into 0.01 mm film sample, directly in the 0.1 Mpa, 150 ℃, the oxygen absorption rate.
(2) multiple extrusion test: repeatedly extrude the sample in the extruder, and the sample can be tested after continuous extrusion, and the sample can be tested once every other time. Test the melt flow index MFI of the sample, or test the physical mechanical property or color difference with the sample. This experiment mainly evaluated the effect of antioxidant on the thermal oxygen stabilization of plastic materials.
(3) oven heat aging test: the sample is placed in a oven with a certain temperature to carry out hot air (and sometimes oxygen) circulation. The carbonyl index, physical mechanical property or color difference of the sample were detected. This experiment mainly evaluated the thermal and oxygen stability of antioxidant and light stabilizer in the storage and use of plastic materials.
(4) artificial accelerated aging test. The sample is placed in an aging tank or an ultraviolet aging machine to simulate the aging test of natural environment or condition. The physical mechanical properties or color difference of the carbonyl index of the test sample. This experiment mainly evaluated the stabilizing effect of antioxidant and light stabilizer on oxygen aging or photoaging of plastics in the process of use.
(5) natural climate test: to place the samples in a natural environment with certain conditions, and conduct experiments on the light and oxygen aging of the natural environment. The carbonyl index and physical mechanical properties of the samples were detected. This experiment evaluated the effects of antioxidant and light stabilizer on the light and oxygen stability of plastic materials in the natural environment.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
Only the data and results of the natural climate test can guide the practical application of plastic products, but the time period of natural climate experiment is long, sometimes even two or three years. Therefore, the comprehensive evaluation results of the first four experiments can basically determine the light and oxygen stability function and function of antioxidant and light stabilizer in the processing and application of plastic products.
The factors that weaken or inhibit the function of antioxidant and light stabilizer. Chemical properties of other additives in the plastic product formula, the type of filling materials, products processing process whether mixing evenly, many factors such as light intensity and temperature use process, can be directly or indirectly, to weaken or inhibit the effect of antioxidant and light stabilizer function and effect. Resin polymerization when heavy metal catalysts, for example, if the residual stock in the resin is too high, will be in the process of products processing and use of the catalytic products resin material degradation, and antioxidants, light stabilizer confrontation. The following example is only a few simple and recognized factors in many complex factors.
Other chemical additives in the formula.
The effect of flame retardant on oxygen agent and light stabilizer is as follows.
Tree fat: high impact polystyrene HIPS, MER=3.
Flame retardant: 1,2 - bis (tetrabromo-phthalamide) ethane BTBPIE;
1,2 - double (pentabromophenyl) ethane BPBPE;
Decabromodiphenyl ether DBDPO;
Retardant: Sb2O3 purity is greater than 99.8%, and the average grain size is 1.
Mg (OH) 2 is treated with the surface of coupling agent, and the average particle size is less than 5 mu.
Titanium white powder: A, model CR -- 60, Al (OH) 3 surface treatment, rutile type, average grain by 0.2 mu;
B, model A -- 200, Al (OH) 3 surface treatment, ruiti type, average grain by 0.2 mu;
C, model A - 100, without the surface treatment, the sharp titanium type, average grain by 0.2 mu.
Partner: HIPS 100, Sb2O3 4, Mg (OH) 2 35.
Light fastness color difference Δ E: injection molding 70 ㎜ x 35 ㎜ x 3 ㎜ sample, with aging instrument black board under the temperature 63 ℃, color difference meter is used to test 300 hours from start to the color difference when Δ E.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
To evaluate the function of antioxidant in plastic materials or products, it is generally required to carry out plastic antioxidant test according to different formulation design, and compare and evaluate the experimental data of plastic antioxidant.
The design of plastic antioxidant test formula is as follows:
A. blank resin;
B. resin + antioxidant;
C. resin + light stabilizer;
D. Resin + antioxidant + light stabilizer;
To evaluate the function of antioxidants in plastic materials or products and select a and b combinations to carry out the test;
To evaluate the function of light stabilizer in plastic materials or products, and select a and c combination for testing;
To evaluate the comprehensive function of antioxidant and light stabilizer in plastic materials or products, and select a and d combinations to carry out the experiment.
There are five main test methods:
: (1). The oxidation induction period experiment on general plastic material, usually with Mr Bandt plasticizing instrument under nitrogen protection, mixing 10 min, and then to mold it into 0.01 mm film sample, directly in the 0.1 Mpa, 150 ℃, the oxygen absorption rate.
(2) multiple extrusion test: repeatedly extrude the sample in the extruder, and the sample can be tested after continuous extrusion, and the sample can be tested once every other time. Test the melt flow index MFI of the sample, or test the physical mechanical property or color difference with the sample. This experiment mainly evaluated the effect of antioxidant on the thermal oxygen stabilization of plastic materials.
(3) oven heat aging test: the sample is placed in a oven with a certain temperature to carry out hot air (and sometimes oxygen) circulation. The carbonyl index, physical mechanical property or color difference of the sample were detected. This experiment mainly evaluated the thermal and oxygen stability of antioxidant and light stabilizer in the storage and use of plastic materials.
(4) artificial accelerated aging test. The sample is placed in an aging tank or an ultraviolet aging machine to simulate the aging test of natural environment or condition. The physical mechanical properties or color difference of the carbonyl index of the test sample. This experiment mainly evaluated the stabilizing effect of antioxidant and light stabilizer on oxygen aging or photoaging of plastics in the process of use.
(5) natural climate test: to place the samples in a natural environment with certain conditions, and conduct experiments on the light and oxygen aging of the natural environment. The carbonyl index and physical mechanical properties of the samples were detected. This experiment evaluated the effects of antioxidant and light stabilizer on the light and oxygen stability of plastic materials in the natural environment.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
Only the data and results of the natural climate test can guide the practical application of plastic products, but the time period of natural climate experiment is long, sometimes even two or three years. Therefore, the comprehensive evaluation results of the first four experiments can basically determine the light and oxygen stability function and function of antioxidant and light stabilizer in the processing and application of plastic products.
The factors that weaken or inhibit the function of antioxidant and light stabilizer. Chemical properties of other additives in the plastic product formula, the type of filling materials, products processing process whether mixing evenly, many factors such as light intensity and temperature use process, can be directly or indirectly, to weaken or inhibit the effect of antioxidant and light stabilizer function and effect. Resin polymerization when heavy metal catalysts, for example, if the residual stock in the resin is too high, will be in the process of products processing and use of the catalytic products resin material degradation, and antioxidants, light stabilizer confrontation. The following example is only a few simple and recognized factors in many complex factors.
Other chemical additives in the formula.
The effect of flame retardant on oxygen agent and light stabilizer is as follows.
Tree fat: high impact polystyrene HIPS, MER=3.
Flame retardant: 1,2 - bis (tetrabromo-phthalamide) ethane BTBPIE;
1,2 - double (pentabromophenyl) ethane BPBPE;
Decabromodiphenyl ether DBDPO;
Retardant: Sb2O3 purity is greater than 99.8%, and the average grain size is 1.
Mg (OH) 2 is treated with the surface of coupling agent, and the average particle size is less than 5 mu.
Titanium white powder: A, model CR -- 60, Al (OH) 3 surface treatment, rutile type, average grain by 0.2 mu;
B, model A -- 200, Al (OH) 3 surface treatment, ruiti type, average grain by 0.2 mu;
C, model A - 100, without the surface treatment, the sharp titanium type, average grain by 0.2 mu.
Partner: HIPS 100, Sb2O3 4, Mg (OH) 2 35.
Light fastness color difference Δ E: injection molding 70 ㎜ x 35 ㎜ x 3 ㎜ sample, with aging instrument black board under the temperature 63 ℃, color difference meter is used to test 300 hours from start to the color difference when Δ E.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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