The influence of chemical media on the performance of PPR pipes
Under the conditions of(23±2)℃ and relative humidity of(50±5)％,three types of PPR pipes produced using different formulas and the same process were treated with different chemical media(acid,alkali,and salt).Conduct infrared spec-troscopy analysis,impact strength test,oxidation induction time and melt mass flow rate test on the pipes,and analyze the changes in microstructure and pipe properties.The results showed that acid,alkali,and salt caused a decrease in the molecular regularity and crystallinity of PPR pipes,resulting in an increase in impact strength and a decrease in melt mass flow rate.PPR pipes un-derwent varying degrees of oxidation,and the oxidation induction time was shortened.Acid,alkali,and salt have the greatest impact on the impact strength of 1# pipe,and have the greatest impact on the melt mass flow rate and oxidation induction time of 3# pipe.
万方数据
维普
