为探究丙烯酸酯共混聚氯乙烯管（ABR）低温环境下的力学性能和使用性能，试验对ABR、高性能硬聚氯乙烯管（PVC-UH）和PN1.0 MPa型号的硬聚氯乙烯（PVC-U）管进行了多种温度条件下的压扁性能和拉伸性能测试，并对3种管道在5 ℃环境中的偏角密封性能进行了试验研究。同时，基于测试和试验结果建立了低温下的ABR管偏角密封性数值模型。试验和模拟的研究结果表明：低温条件下，ABR管的力学性能优于PVC-UH和PVC-U管，丙烯酸酯（ACR）改性剂的混入显著提高了ABR管低温下的压扁、拉伸和抗渗漏性能。在5 ℃的环境中，ABR管材的屈服强度为57.1 MPa，弹性模量为3 679.3 MPa，断裂伸长率为71.5%，环刚度为22.67 kN/m²，环柔性良好。同时，在5 ℃的环境中，ABR管线接口处在0.4 MPa静液压和8°偏角位移的作用下依旧能保持密封性。

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.