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RUBBER GRADE Of CPE Products In The Use Of Long-term Contact With The Oil Medium

Weifang Yaxing Chemical Co.,Ltd | Updated: Sep 22, 2017

RUBBER GRADE of CPE products in the use of long-term contact with the oil medium
One, oxygen
A) Oxygen: Oxygen in RUBBER GRADE of CPE with RUBBER GRADE of CPE molecules free radical chain reaction, molecular chain breakage or excessive cross-linking, causing RUBBER GRADE of CPE performance changes. Oxidation is one of the important reasons for the aging of RUBBER GRADE of CPE.
Second, ozone
B) Ozone: Ozone chemical activity is much higher than oxygen, more destructive, it is also the molecular chain fracture, but the role of ozone on RUBBER GRADE of CPE with RUBBER GRADE of CPE deformation or not different. When acting as a deformed RUBBER GRADE of CPE (mainly unsaturated RUBBER GRADE of CPE), there is a crack in the direction of stress, the so-called "ozone cracking"; when the RUBBER GRADE of CPE is deformed, only the surface The oxide film is formed without cracking.
Three, hot
C) Heat: Raising the temperature can cause thermal cracking or thermal crosslinking of the RUBBER GRADE of CPE. But the basic role of heat or activation. Increase the rate of oxygen diffusion and activation of oxidation, thereby accelerating the RUBBER GRADE of CPE oxidation reaction rate, which is a common phenomenon of aging - thermal oxygen aging.
Four light
D) light: the shorter the light, the greater the energy. RUBBER GRADE of CPE from the destruction of the role of high energy UV. In addition to the RUBBER GRADE of CPE molecular chain of the fracture and cross-linking, RUBBER GRADE of CPE due to the absorption of light energy generated free radicals, trigger and accelerate the oxidation chain reaction process. By the outside light plays the role of heating. Another feature of the role of light (different from the heat) is that it is mainly in the rubber surface and health. High rate of plastic samples, both sides will appear reticular cracks, the so-called "light outer crack."
Fifth, mechanical stress
E) Mechanical stress: under the repeated mechanical stress, RUBBER GRADE of CPE molecular chain will break into free Tsuen, lead to oxidation chain reaction, the formation of chemical process. Mechanical fracture molecular chain and mechanical activation oxidation process. How can a dominant, depending on the conditions in which it depends. In addition, under the action of stress easily lead to ozone cracking.
Six, moisture
F) Moisture: The role of moisture in two ways: RUBBER GRADE of CPE in the humid air rain or soak in water, easy to damage, it is due to RUBBER GRADE of CPE in the water-soluble substances and hydrophilic groups and other ingredients Water extraction dissolved, hydrolyzed or absorbed and other causes. Especially in the water immersion and atmospheric exposure of the alternating effect, will accelerate the RUBBER GRADE of CPE damage. But in some cases the moisture on the RUBBER GRADE of CPE can not afford to damage, and even delay the role of aging.
Seven, oil
G) RUBBER GRADE of CPE products in the use of long-term contact with the oil medium, oil can penetrate into the RUBBER GRADE of CPE internal swelling, resulting in RUBBER GRADE of CPE strength and other mechanical properties. Oil can make RUBBER GRADE of CPE swelling, because oil infiltration RUBBER GRADE of CPE, resulting in the proliferation of molecules, so that the network structure of vulcanized rubber changes.
When the material is sprayed from the aerosol can, the foamy polyurethane material swells rapidly and forms a foam with the moisture in the air or in the matrix in contact with it. After curing, the OCF foam has a variety of effects such as caulking, sticking, sealing, heat insulation and sound absorption. It is an environmentally friendly and easy-to-use building material. It can be used for sealing plugging, filling and fixing, Insulation, especially for steel or aluminum doors and windows and walls between the sealed plugging and waterproof. RUBBER GRADE of CPE Highly expandable polyurethane based fast fixative foam fillers can be used in humid environments.
RUBBER GRADE of CPE can be used for wide interface, cracks, cracks in the seal, insulation, filling, to heat, cold, dry, sound and moisture. Such as the gap between the partition and the ceiling, the window frame, the door frame, the hole between the walls, the gap between the roof and the chimney, the walls, the ceiling, the seal around the roof pipe, and the holes and damage on the wall. RUBBER GRADE of CPE can also be used for bonding a variety of materials such as metals, wood, stone, concrete and a variety of synthetic materials such as polyester, polystyrene foam, PVC plastic, rigid polyurethane foam.