HDPE／顺丁橡胶共混材料磨蚀速率的研究

STUDY ON EROSIVE RATE OF HIGH DENSITY POLYETHYLENE/POLYBUTABIENE BLEND

用自制的旋臂式磨蚀实验仪，研究了高密度聚乙烯（ＨＤＰＥ）／顺丁橡胶（ｃｉｓ－ＢＲ）、高密度聚乙烯和４５＃钢在攀枝花尾矿矿浆中的磨蚀速率（ω）与磨蚀温度和磨蚀时间的关系。结果表明，在２０～４８℃时，ω（ＨＤＰＥ／ｃｉｓ－ＢＲ）和ω（ＨＤＰＥ）分别保持在０．１７～０．２０ｍｍ／ａ和０．２２～０．３０ｍｍ／ａ。在５５℃时，ω（ＨＤＰＥ／ｃｉｓ－ＢＲ）和ω（ＨＤＰＥ）分别增加至０．２８和０．３９ｍｍ／ａ。在２０～５５℃时，ω（４５＃）从８．５８ｍｍ／ａ迅速增高至２３．９８ｍｍ／ａ．在８００ｈ内，ω（ＨＤＰＥ／ｃｉｓ－ＢＲ）、ω（ＨＤＰＥ）和ω（４５＃）皆随时间增加而下降，但磨蚀速率之比ω（ＨＤＰＥ／ｃｉｓ－ＢＲ）／ω（４５＃）和ω（ＨＤＰＥ／ｃｉｓ－ＢＲ）／ω（ＨＤＰＥ）与磨蚀时间无关，分别保持在０．０１８和０．７６左右。

The effects of temperature and time on erosive rates of polybutadiene modified high density polyethylene(ω(HDPE/cis-BR)), unmodified high density polyethylene(ω(HDPE))and steel 45 (ω(45))by tailings slurry from Panzhihua iron mine were studied with a self-made erosive experimental set-up equipped with six whirling arms.W(ω(HDPE/cis-BR) and ω(HDPE) are 0.17～0.20 mm/a and 0.22～0.30 mm/a in temperature range of 20～48℃respectively. At 55℃they increase to 0.28 and 0.39 mm/a. W(45)increases rapidly from8.58 mm/a to 23.98 mm/a with temperature,ω(HDPE/cis-BR),ω(HDPE) and ω(45) decrease with erosive time. Either of the ratio of erosive rate ω(HDPE/cis-BR)/ω(HDPE) or that of ω(HDPE/cis-BR)ω(45) is irrelevant to erosive time fixed at 0.76 and 0.018 average respectively.