A kind of aramid pulp and basalt short fiber directionally reinforced rubber composite material and preparation method thereof
A technology of aramid pulp and composite materials, which is applied in the field of rubber composite materials, can solve problems such as unreported research, and achieve the effects of simple process, improved flexural performance, and reduced cost
Active Publication Date: 2019-10-15
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology
At present, there is no report on the research on the combination of aramid pulp and basalt short fiber to strengthen composite materials
Method used
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Embodiment 1-3
[0034] The preparation method of embodiment 1-3 is:
[0035]1) One-stage rubber mixing: feed temperature 55°C, speed 30rpm, put chloroprene rubber and aramid pulp in an internal mixer and mix for 2 minutes, add anti-aging agent, magnesium oxide and stearic acid and mix for 1 minute , respectively add half of the reinforcing agent and plasticizer and knead for 1min, then add the remaining reinforcing agent and plasticizer for 1.5min, then add basalt short fiber and silane coupling agent and knead for 1min, then clean and degumming, the degumming temperature is 100 ℃ or so.
[0036] 2) Two-stage mixing: Feed material temperature is 50°C, speed is 20rpm, rubber material and zinc oxide are added and mixed for 1.5min, then the glue is discharged, and the glue discharge temperature is about 95°C.
[0037] 3) The prepared mixed rubber is thinly passed through the mill for 5 times or oriented on the calender;
[0038] 4) Take 26 parts by weight of the above processed blend material ...
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Abstract
The invention relates to an aramid pulp and basalt short fiber orientationally-enhanced rubber composite material and a preparation method thereof. The aramid pulp and basalt short fiber orientationally-enhanced rubber composite material comprises the following components by mass: 100 parts of neoprene, 1 to 10 parts of a plasticizer, 20 to 100 parts of a reinforcing agent, 5 to 10 parts of a vulcanizing agent, 1 to 20 parts of basalt short fiber, 1 to 20 parts of aramid pulp, 1 to 3 parts of a silane coupling agent, 1 to 4 parts of an antioxidant and 1 part of stearic acid. Through combination of the aramid pulp and the basalt short fiber, and the defects of easy breakage and low modulus due to single use of the basalt short fiber and poor flexural property, poor deformation and expensiveprice due to single use of the aramid pulp can be improved. The mechanical properties of the composite material vulcanized rubber prepared by the invention are as follows: the aramid pulp and the basalt short fiber are orientated in the stretching direction of a dumbbell-shaped tensile specimen, hardness is 70-80 (Shore A); the tensile strength (at room temperature) is 10-15MPa; the elongation atbreak is 200-300%; tear strength is 60-70N / mm; the number of flexure times is 1000-6000; and dynamic stiffness is 3000-5000N / mm (detected by a MTS testing machine under the conditions of 2500N+ / -200N, frequency of 20HZ and rpm of 1000rpm). The composite material prepared by the method has the advantages of simple process, and excellent processability, and performances can meet the requirements ofa transmission belt.
Description
technical field [0001] The invention relates to a rubber composite material with chloroprene rubber as the matrix, equipped with basalt short fiber and aramid pulp directional reinforcement. It is an elastomer material that can enhance the transverse rigidity but does not affect the longitudinal flexibility, and can be used for rubber transmission belts. , Conveyor belts and other rubber products. Background technique [0002] Belt transmission is one of the important transmission forms of mechanical transmission. With the continuous improvement of industrial technology and the requirements for precision, light weight, functionalization and individualization of mechanical equipment, it is constantly moving towards high precision, high speed, high power, high With the development of efficiency, high reliability, long life, low noise, low vibration, low cost, environmental protection and compactness, its application range is getting wider and wider, and there are more and more...
Claims
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IPC IPC(8): C08L11/00C08L77/10C08K13/06C08K9/06C08K7/10C08K3/34C08K3/04C08K5/09C08J5/06C08J5/10
Inventor 陈春花王建军辛振祥
Owner QINGDAO UNIV OF SCI & TECH