超高分子量聚乙烯是一种具有优异性能的高分子材料，具有高强度、高韧性、低摩擦系数、耐磨损、耐化学腐蚀等特点，广泛应用于机械制造、医疗器械、食品包装、输送设备等领域。为了保证超高分子量聚乙烯材料的质量和性能，需要对其进行试样制备和性能测试。

ISO 21304-2:2021标准规定了超高分子量聚乙烯模塑和挤出材料的试样制备方法和性能测试方法。试样制备包括切割、磨削、钻孔等方法，试样形状包括板材、棒材、管材等。性能测试包括力学性能、热性能、电性能和耐化学性能等方面的测试。

力学性能测试包括拉伸强度、弯曲强度、冲击强度等指标的测试。热性能测试包括热变形温度、热膨胀系数等指标的测试。电性能测试包括体积电阻率、表面电阻率等指标的测试。耐化学性能测试包括耐酸碱、耐溶剂等指标的测试。

ISO 21304-2:2021标准的实施可以保证超高分子量聚乙烯材料的质量和性能，为超高分子量聚乙烯材料的应用提供了可靠的基础数据。

相关标准
- ISO 21303-1:2021 Plastics — Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials — Part 1: Designation system and basis for specifications
- ISO 21303-2:2021 Plastics — Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials — Part 2: Preparation of test specimens and determination of properties
- ISO 21303-3:2021 Plastics — Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials — Part 3: Requirements and test methods for pipes and fittings for pressure applications
- ISO 21303-4:2021 Plastics — Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials — Part 4: Requirements and test methods for semi-finished products, rods and sheets for machining
- ISO 21303-5:2021 Plastics — Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials — Part 5: Requirements and test methods for profiles and tubes for engineering applications