耐热聚乙烯管材专用树脂的性能

摘要

The authors studied basic physical properties, long-term heat stability, processability and hydrostatic strength of the special polyethylene resin (QHM22F) for heat resistant pipes. The processing and application experiments of the pipes with different diameters made of the resin were carried out in the pipe enterprises. The results indicate that the Charpy impact strength of QHM22F is higher than 70 kJ/m2, oxidation induction time at 200 ℃ is over 120 min and melting strength is above 0.24 N. QHM22F has excellent processability and meet the processing conditions for high speed pulling. The pipe made of QHM22F has the advantages of uniform thickness and smooth inner and outer surface; its properties satisfy the users'requirement.%研究了耐热聚乙烯管材专用树脂QHM22F的常规物性、长期热稳定性、加工性能、静液压强度等,并在管材生产厂家进行了不同口径的管材加工应用试验.结果表明:QHM22F的简支梁缺口冲击强度在70 k J/m2以上:200℃氧化诱导期大于120 min；熔体强度在0.24 N以上；加工性能良好,可满足高速牵引的加工需要.采用QHM221F生产的管材内外表面光滑、壁厚均匀,性能满足用户要求.