【正文】
膠 熱聚丁腈橡膠的加工性能較差,表現(xiàn)為可塑性獲得較難,吃粉也較慢。 2022/2/9 AcrylonitrileButadiene Rubber Nitrile Rubber (NBR) is monly considered the workhorse of the industrial and automotive rubber products industries. NBR is actually a plex family of unsaturated copolymers of acrylonitrile and butadiene. By selecting an elastomer with the appropriate acrylonitrile content in balance with other properties, the rubber pounder can use NBR in a wide variety of application areas requiring oil, fuel, and chemical resistance. In the automotive area, NBR is used in fuel and oil handling hose, seals and grommets. With a temperature range of – 40 186。 – 如: NBR- 2626,表示丙烯量含量為26%~ 30%,是軟丁腈橡膠,門尼黏度為 65~ 80; – NBR3606,表示丙烯腈含量為 36%~40%,是硬丁腈橡膠,有污染性,門尼黏度為 65~79。 2022/2/9 第七節(jié) 丁腈橡膠 2022/2/9 第七節(jié) 丁腈橡膠 ⑶ 、無自補強性 丁腈橡膠是非結(jié)晶性橡膠,無自補強性,純膠硫化膠的拉伸強度只有 ~,必須經(jīng)補強后才有使用價值,炭黑補強硫化膠的拉伸強度可達 25~30MPa,而優(yōu)于丁苯橡膠。 2022/2/9 第七節(jié) 丁腈橡膠 2022/2/9 第七節(jié) 丁腈橡膠 ⑷ 、良好的耐磨性 丁腈橡膠的極性,增大了分子間力,從而使耐磨性提高,其耐磨性比天然橡膠高 30%~ 45%。近年來,油氣井深度越來越深,井下環(huán)境和溫度條件日益