丙烯酸酯共混聚氯乙烯(ABR)管低温力学性能研究OA北大核心CSTPCD

To investigate the mechanical and operational properties of acrylate polymer blended with polyvinyl chloride resin(ABR)pipes in low-temperature environments,the study conducted compression and tensile performance tests on ABR,high performance unplasticized polyvinyl chloride pipe(PVC-UH),and unplasticized polyvinyl chloride(PVC-U)pipes of PN1.0 MPa specification under various temperature conditions.An experimental study on the tightness under internal pressure and angular deflection performance of the three types of pipes in a 5℃ environment was also carried out.Based on test and experimental results,a numerical simulation study of the deflection angle sealing performance of ABR pipes at low temperatures was conducted.The results indicate that at low-temperature conditions,the mechanical performance of ABR pipes surpasses that of PVC-UH and PVC-U pipes,the incorporation of acrylate polymer(ACR)modifier significantly enhances the compression,tensile,and leak resistance properties of ABR pipes at low-temperature conditions.At 5℃,the yield strength of ABR pipe material is 57.1 MPa,the elastic modulus is 3 679.3 MPa,the elongation at break is 71.5％,the ring stiffness is 22.67 kN/m2,and the ring flexibility is excellent.Simultaneously,in a 5℃ environment,the sealing integrity of ABR pipe joints remains intact under the influence of 0.4 MPa static hydraulic pressure and an 8° deflection angle displacement.