Background technology
Polyethylene (polyethylene is called for short PE) is that ethene is through being polymerized obtained a kind of thermoplastic resin.Industrially, the multipolymer of ethene and a small amount of alpha-olefin is also comprised.Polyethylene odorless, nontoxic, feel ceraceous, have excellent resistance to low temperature (minimum use temperature can reach-100 ~-70 ° of C), chemical stability is good, the erosion (the not resistance to acid with oxidizing property) of the most of soda acid of ability.Be insoluble to common solvent under normal temperature, water-absorbent is little, and electrical insulating property is excellent.
Polyethylene, according to the difference of polymerization process, molecular weight height, chain structure, divides high density polyethylene(HDPE), Low Density Polyethylene and linear low density polyethylene.Low Density Polyethylene (LOW DENSITY POLYETHYLENE, LDPE) is commonly called as high-pressure polyethylene, and because density is lower, material is the softest, is mainly used in polythene bag, film for agricultural use etc.High density polyethylene(HDPE) (HIGH DENSITY POLYETHYLENE, HDPE) low pressure polyethylene is commonly called as, compare with LDPE and LLDPE, there are higher heatproof, oil-proofness, resistance to vapour permeability and environmental stress crack resistance, in addition electrical insulating property and shock resistance and cold tolerance fine, be mainly used in the field such as blowing, injection moulding.LLDPE (LINEAR LOW DENSITY POLYETHYLENE, LLDPE) is then the multipolymer that ethene and a small amount of senior Α-alkene are polymerized in the presence of a catalyst.The advantages such as LLDPE outward appearance is similar to LDPE, and the transparency is more poor, and only surface luster is good, has low-temperature flexibility, high-modulus, counter-bending and stress cracking resistance, and under low temperature resistance to impact shock is better.LLDPE Application Areas has almost penetrated into all LDPE market.Present stage LLDPE and HDPE is in the stage of growth of life cycle; LDPE then progresses into the full-fledged phase in 1980 generation ends, and rare LDPE equipment is gone into operation in the world.Polyethylene can with extruding, inject, molding, the method such as blowing and melt-spun be shaping, be widely used in industry, agricultural, packaging and daily industry, in China, application is quite extensive, film is its maximum user, about consume Low Density Polyethylene 77%, 18% of high density polyethylene(HDPE), in addition, injection-molded item, electric wire, hollow piece etc. all occupy larger ratio in its consumption structure, occupy very important status in plastics industry.
The Chinese patent application that application number is 200710173737.3, denomination of invention is " polyethylene film " discloses a kind of light weight polyethylene film.Be prepared from by the raw material of following weight part: polyethylene membrane composite master batch 2-50 part; Polyethylene 50-98 part, wherein, described polyethylene membrane composite master batch, is prepared from by the raw material of following weight part: filler 80-100 part; Polyolefine 5-25 part; Gather and modifier 10-15 part; Lipid acid 11-15 part; Mineral oil 2-8 part; Coupling agent 2-3 part; Linking agent 0.1-0.08 part.Light weight polyethylene film proportion described in this invention is at 0.8 ~ 0.95G/CM3, and while reduction finished films cost, its crux physicals does not decline, elongation at break >=150%, tensile property >=25MPA, heat sealing strength >=6.0.But the resistance to impact shock of this patent is less, thus make use range limited.
Application number is 201180046952.1, the Chinese patent application that denomination of invention is " polyethylene extruded product " comprises the polyvinyl extruded product obtained by polymerization, particularly film, described polymerization is carried out under the product by making following component contact acquisition exists: (a) comprises magnesium halide, there is the titanium compound of at least Ti-halogen bond and choose any one kind of them or the ingredient of solid catalyst of multiple internal electron donor compound, (b) hydrocarbyl aluminium compound, (c) optional external donor compound, (d) polyvalent alcohol of partial esterification is carried out with the carboxylic acid containing the alkyl with at least 10 carbon atoms.The breaking tenacity of this patent and tensile strength are not high.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, plasticising toughened polyethylene composition and preparation method thereof is provided, plasticising toughened polyethylene composition, mechanical property and good mechanical properties.
The present invention is by the following technical solutions:
Plasticising toughened polyethylene composition, comprises the raw material of following parts by weight: polyethylene 10 ~ 50 parts, polyphenylene sulfide 40 ~ 60 parts, trimethylammonium dimethyl phosphate 70 ~ 80 parts, acetic acid ethoxy ethyl ester 70 ~ 100 parts, pimelinketone 40 ~ 80 parts, sodium stearate 70 ~ 90 parts, 40 ~ 60 parts, graphite, stablizer 50 ~ 80 parts, promotor 50 ~ 90 parts, rubber 40 ~ 100 parts.
As a further improvement on the present invention, the raw material of following parts by weight is comprised: polyethylene 35 parts, polyphenylene sulfide 50 parts, trimethylammonium dimethyl phosphate 75 parts, acetic acid ethoxy ethyl ester 80 parts, pimelinketone 60 parts, sodium stearate 80 parts, 50 parts, graphite, stablizer 60 parts, promotor 70 parts, rubber 60 parts.
As a further improvement on the present invention, stablizer is the one in calcium stearate, citrate of lime, Zinic stearas or zinc citrate.
As a further improvement on the present invention, promotor is the one in cobalt naphthenate, cobalt iso-octoate, isocaprylic acid zinc, DMA, N, N-Diethyl Aniline or vanadium phosphate.
As a further improvement on the present invention, rubber is the one in viton, chloroprene rubber, isoprene-isobutylene rubber, silicon rubber or polyether rubber.
The preparation method of plasticising toughened polyethylene composition, comprises the following steps:
(1) polyethylene, polyphenylene sulfide, trimethylammonium dimethyl phosphate are mixed, be warming up to 50 ~ 60 DEG C of reactions 20 ~ 30 minutes, cooling;
(2) add acetic acid ethoxy ethyl ester, pimelinketone, sodium stearate, graphite, stablizer, promotor, rubber, homogenizer mixes, the rotating speed of homogenizer is 1000 ~ 2000 revs/min, and churning time is 1 ~ 2 hour;
(3) by the pellet that mixes by twin screw extruder extruding pelletization, extruder temperature is 100 ~ 200 DEG C, and rotating speed is 50 ~ 60 revs/min.
As a further improvement on the present invention, step (2) rotating speed is 1500 revs/min, and churning time is 1.5 hours.
As a further improvement on the present invention, step (3) extruder temperature is 150 DEG C, and rotating speed is 55 revs/min.
technique effect
Breaking tenacity of the present invention is 70 ~ 78MPa, and simply supported beam notched Izod impact strength is 23 ~ 28KJm
2, tensile strength is 130 ~ 140MPa, and the fracture of composite materials intensity not containing acetic acid ethoxy ethyl ester is 50MPa, and simply supported beam notched Izod impact strength is 12KJm
2, tensile strength is 97MPa, and properties of the present invention is all better than comparative example, has good toughness reinforcing speedup effect, mechanical property and mechanical property good.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described in detail.
embodiment 1
Plasticising toughened polyethylene composition, comprises the raw material of following parts by weight: polyethylene 10 parts, polyphenylene sulfide 40 parts, trimethylammonium dimethyl phosphate 70 parts, acetic acid ethoxy ethyl ester 70 parts, pimelinketone 40 parts, sodium stearate 70 parts, 40 parts, graphite, stablizer 50 parts, promotor 50 parts, rubber 40 parts.
Stablizer is Zinic stearas.
Promotor is cobalt naphthenate.
Rubber is viton.
The preparation method of plasticising toughened polyethylene composition, comprises the following steps:
(1) polyethylene, polyphenylene sulfide, trimethylammonium dimethyl phosphate are mixed, be warming up to 50 ~ 60 DEG C of reactions 20 ~ 30 minutes, cooling;
(2) add acetic acid ethoxy ethyl ester, pimelinketone, sodium stearate, graphite, stablizer, promotor, rubber, homogenizer mixes, the rotating speed of homogenizer is 1000 ~ 2000 revs/min, and churning time is 1 ~ 2 hour;
(3) by the pellet that mixes by twin screw extruder extruding pelletization, extruder temperature is 100 ~ 200 DEG C, and rotating speed is 50 ~ 60 revs/min.
embodiment 2
Plasticising toughened polyethylene composition, comprises the raw material of following parts by weight: polyethylene 50 parts, polyphenylene sulfide 60 parts, trimethylammonium dimethyl phosphate 80 parts, acetic acid ethoxy ethyl ester 100 parts, pimelinketone 80 parts, sodium stearate 90 parts, 60 parts, graphite, stablizer 80 parts, promotor 90 parts, rubber 100 parts.
Stablizer is zinc citrate.
Promotor is N, N-Diethyl Aniline.
Rubber is polyether rubber.
The preparation method of plasticising toughened polyethylene composition, comprises the following steps:
(1) polyethylene, polyphenylene sulfide, trimethylammonium dimethyl phosphate are mixed, be warming up to 50 ~ 60 DEG C of reactions 20 ~ 30 minutes, cooling;
(2) add acetic acid ethoxy ethyl ester, pimelinketone, sodium stearate, graphite, stablizer, promotor, rubber, homogenizer mixes, the rotating speed of homogenizer is 1000 ~ 2000 revs/min, and churning time is 1 ~ 2 hour;
(3) by the pellet that mixes by twin screw extruder extruding pelletization, extruder temperature is 100 ~ 200 DEG C, and rotating speed is 50 ~ 60 revs/min.
embodiment 3
Plasticising toughened polyethylene composition, comprises the raw material of following parts by weight: polyethylene 35 parts, polyphenylene sulfide 50 parts, trimethylammonium dimethyl phosphate 75 parts, acetic acid ethoxy ethyl ester 80 parts, pimelinketone 60 parts, sodium stearate 80 parts, 50 parts, graphite, stablizer 60 parts, promotor 70 parts, rubber 60 parts.
Stablizer is citrate of lime.
Promotor is DMA.
Rubber is isoprene-isobutylene rubber.
The preparation method of plasticising toughened polyethylene composition, comprises the following steps:
(1) polyethylene, polyphenylene sulfide, trimethylammonium dimethyl phosphate are mixed, be warming up to 50 ~ 60 DEG C of reactions 20 ~ 30 minutes, cooling;
(2) add acetic acid ethoxy ethyl ester, pimelinketone, sodium stearate, graphite, stablizer, promotor, rubber, homogenizer mixes, the rotating speed of homogenizer is 1000 ~ 2000 revs/min, and churning time is 1 ~ 2 hour;
(3) by the pellet that mixes by twin screw extruder extruding pelletization, extruder temperature is 100 ~ 200 DEG C, and rotating speed is 50 ~ 60 revs/min.
embodiment 4
Plasticising toughened polyethylene composition, comprises the raw material of following parts by weight: polyethylene 15 parts, polyphenylene sulfide 45 parts, trimethylammonium dimethyl phosphate 78 parts, acetic acid ethoxy ethyl ester 75 parts, pimelinketone 45 parts, sodium stearate 75 parts, 45 parts, graphite, stablizer 55 parts, promotor 55 parts, rubber 45 parts.
Stablizer is Zinic stearas.
Promotor is cobalt iso-octoate.
Rubber is silicon rubber.
The preparation method of plasticising toughened polyethylene composition, comprises the following steps:
(1) polyethylene, polyphenylene sulfide, trimethylammonium dimethyl phosphate are mixed, be warming up to 50 ~ 60 DEG C of reactions 20 ~ 30 minutes, cooling;
(2) add acetic acid ethoxy ethyl ester, pimelinketone, sodium stearate, graphite, stablizer, promotor, rubber, homogenizer mixes, the rotating speed of homogenizer is 1000 ~ 2000 revs/min, and churning time is 1 ~ 2 hour;
(3) by the pellet that mixes by twin screw extruder extruding pelletization, extruder temperature is 100 ~ 200 DEG C, and rotating speed is 50 ~ 60 revs/min.
comparative example
Identical with embodiment 1, unlike: not containing acetic acid ethoxy ethyl ester.
performance test
Performance test is carried out to embodiment 1 ~ 3 and comparative example, the results are shown in Table 1.
Table 1
? |
Embodiment 1 |
Embodiment 2 |
Embodiment 3 |
Embodiment 4 |
Comparative example |
Breaking tenacity MPa |
70 |
73 |
78 |
76 |
50 |
Simply supported beam notched Izod impact strength KJm
2 |
23 |
25 |
28 |
26 |
12 |
Tensile strength MPa |
130 |
138 |
140 |
136 |
97 |
Conclusion: known according to table 1, breaking tenacity of the present invention is 70 ~ 78MPa, and simply supported beam notched Izod impact strength is 23 ~ 28KJm
2, tensile strength is 130 ~ 140MPa, and the breaking tenacity of comparative example is 50MPa, and simply supported beam notched Izod impact strength is 12KJm
2, tensile strength is 97MPa, and properties of the present invention is all better than comparative example, has good toughness reinforcing speedup effect.