阅读说明：本技术 一种电缆通信套管用改性聚丙烯材料及其制备方法 (Modified polypropylene material for cable communication sleeve and preparation method thereof ) 是由 全帅 姬姗姗 张永专 杨瑞宁 于 2020-01-14 设计创作，主要内容包括：本发明属于高分子材料技术领域,具体涉及一种电缆通信套管用改性聚丙烯材料及其制备方法。包括以下重量份的组分,聚丙烯100份、线性低密度聚乙烯15-20份、乙烯-辛烯共聚物POE 2-20份、琥珀酸酐0.1-0.2份、乙二醇二甲基丙烯酸酯0.05-0.1份、抗氧剂0.1-0.5份。本发明电缆导管用改性聚丙烯材料具有质轻,穿电缆时阻力小,热熔焊接强度高；优良的电气绝缘性能；韧性好,室温下测试其断裂伸长率＞500%；强度高,室温下拉伸强度＞34MPa,熔接接头强度＞25MPa,弯曲强度＞44MPa；低温抗冲击性能好,可在-10℃-70℃下长期使用。(The invention belongs to the technical field of high polymer materials, and particularly relates to a modified polypropylene material for a cable communication sleeve and a preparation method thereof. The polyethylene glycol dimethacrylate comprises, by weight, 100 parts of polypropylene, 15-20 parts of linear low density polyethylene, 2-20 parts of ethylene-octene copolymer POE, 0.1-0.2 part of succinic anhydride, 0.05-0.1 part of ethylene glycol dimethacrylate and 0.1-0.5 part of antioxidant. The modified polypropylene material for the cable conduit has the advantages of light weight, small resistance when penetrating the cable, and high hot-melt welding strength; excellent electrical insulating properties; the toughness is good, and the elongation at break is more than 500 percent when tested at room temperature; the strength is high, the tensile strength is more than 34MPa at room temperature, the strength of a welded joint is more than 25MPa, and the bending strength is more than 44 MPa; the low-temperature impact resistance is good, and the paint can be used for a long time at the temperature of minus 10 ℃ to 70 ℃.)

1. A modified polypropylene material for cable communication sleeves is characterized in that: the polyethylene glycol dimethacrylate comprises, by weight, 100 parts of polypropylene, 15-20 parts of linear low density polyethylene, 2-20 parts of ethylene-octene copolymer POE, 0.1-0.2 part of succinic anhydride, 0.05-0.1 part of ethylene glycol dimethacrylate and 0.1-0.5 part of antioxidant.

2. The modified polypropylene material for cable communication sleeves as claimed in claim 1, wherein the polypropylene consists of isotactic polypropylene and atactic polypropylene in a mass ratio of 1-4: 1.

3. The modified polypropylene material for cable communication sleeves according to claim 1, wherein the linear low density polyethylene has a melt flow rate of 1.5 to 2.3 g/10 min.

4. The modified polypropylene material for cable communication sleeves as claimed in claim 1, wherein the antioxidant is a mixture of 168 and 1010, and the mass ratio of the antioxidant to the polypropylene is 0.1: 0.4-0.4:0.1.

5. A method for preparing the modified polypropylene material for the cable communication sleeve as claimed in any one of claims 1 to 4, comprising the steps of:

(1) adding succinic anhydride and ethylene glycol dimethacrylate into the POE master batch, and then mixing the POE master batch and the POE master batch for 40-50min by adopting a mixer to obtain a mixed material A for later use;

(2) mixing polypropylene, linear low-density polyethylene, an antioxidant and a mixed material A in a high-speed mixer, fully mixing at 75 ℃, cooling, adding the mixture into a double-screw extruder, and extruding and granulating to obtain the modified polypropylene for the cable guide pipe.

6. The preparation method as claimed in claim 5, wherein the temperatures of the twin-screw extruder in six sections from the charging port to the head are 200-.

7. The method as claimed in claim 5 or 6, wherein the screw rotation speed of the twin-screw extruder is 30 to 100 r/min.

Technical Field

The invention belongs to the technical field of high polymer materials, and particularly relates to a modified polypropylene material for a cable communication sleeve and a preparation method thereof.

Background

With the rapid development of social economy, the power cable buried laying engineering puts higher requirements on cable conduits. The polypropylene as a green building material has the advantages of no toxicity, light weight, corrosion resistance, long service life and the like, and then the high crystallinity, the poor toughness and the low elongation at break of the polypropylene are caused by the high regularity of the polypropylene molecular chain, so that the polypropylene can not completely meet the use requirements when being used as a cable conduit for laying underground cables. Polypropylene must therefore be modified for application in cable ducts.

Ethylene-octene copolymer (POE) is a nonpolar high polymer material, the interfacial adhesion property is poor, when POE is adopted to modify polypropylene, the requirement for a non-excavation cable protective sleeve can not be met, and the stability of the POE still needs to be improved.

Disclosure of Invention

The invention aims to solve the technical problem of providing modified polypropylene for a cable conduit according to the use and construction requirements of a non-excavation modified polypropylene plastic cable conduit, wherein the material has the advantages of good toughness, higher tensile strength and bending strength and better compression resistance.

The invention also provides a preparation method of the modified polypropylene for the cable duct.

The technical scheme adopted by the invention for realizing the purpose is as follows:

the invention provides a modified polypropylene material for a cable communication sleeve, which comprises the following components, by weight, 100 parts of polypropylene, 15-20 parts of linear low density polyethylene, 2-20 parts of ethylene-octene copolymer POE, 0.1-0.2 part of succinic anhydride, 0.05-0.1 part of ethylene glycol dimethacrylate and 0.1-0.5 part of antioxidant.

Further, the polypropylene is composed of isotactic polypropylene and atactic polypropylene according to the mass ratio of 1-4: 1.

Further, the linear low density polyethylene has a melt flow rate of 1.5 to 2.3 g/10 min.

The antioxidant used in the invention is a mixture of 168 and 1010, and the mass ratio is 0.1: 0.4-0.4:0.1.

The invention also provides a preparation method of the modified polypropylene material for the cable communication sleeve, which comprises the following steps:

(1) adding succinic anhydride and ethylene glycol dimethacrylate into the POE master batch, and then mixing the POE master batch and the POE master batch for 40-50min by adopting a mixer to obtain a mixed material A for later use;

(2) mixing polypropylene, linear low-density polyethylene, an antioxidant and a mixed material A in a high-speed mixer, fully mixing at 75 ℃, cooling, adding the mixture into a double-screw extruder, and extruding and granulating to obtain the modified polypropylene for the cable guide pipe.

Further, the six sections of the temperature of the double-screw extruder from the charging opening to the head are respectively 200-.

Further, the screw rotating speed of the double-screw extruder is 30-100 r/min.

The invention has the beneficial effects that: the modified polypropylene material for the cable communication sleeve has the advantages of light weight, small resistance when penetrating a cable and high hot-melt welding strength; excellent electrical insulating properties; the toughness is good, and the elongation at break is more than 500 percent when tested at room temperature; the strength is high, the tensile strength is more than 34MPa at room temperature, the strength of a welded joint is more than 25MPa, and the bending strength is more than 44 MPa; the low-temperature impact resistance is good, and the paint can be used for a long time at the temperature of minus 10 ℃ to 70 ℃.

Detailed Description

The technical solution of the present invention is further explained and illustrated by the following specific examples. The technical solution of the present invention is not limited to the specific embodiments listed below.

The antioxidant 168 used in the invention is tris [2, 4-di-tert-butylphenyl ] phosphite, and the antioxidant 1010 is pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].