高密度聚乙烯单聚合物复合材料的制备及性能

High density polyethylene single polymer composite (HDPE SPC), of which reinforcement and matrix are all from HDPE, has the advantages such as high mechanical properties, good interfacial bonding and easy recyclability. Hot compaction and film stacking are the earliest methods for SPC preparation and were also industrialized. In this paper, hot compaction and film stacking methods were used to prepare HDPE SPC, and the influence of the compaction temperature, microstructure and mechanical properties of the samples were analyzed. The results show that the HPDE SPC prepared by hot compaction method can obtain higher fiber content than film stacking method, and thus the HPDE SPC prepared by hot compaction have higher mechanical properties. The tensile strength and tensile modulus of the HDPE SPC prepared by hot compaction method are (28.55±0.77) MPa and (746.62±31) MPa, 1.48 times and 1.37 times of pure HDPE, respectively. The tensile stress-strain curves of the samples were also analyzed. The theoretical values of the tensile strength and modulus of the HDPE SPC prepared by film stacking method were calculated, and the fiber contents of the HDPE SPC prepared by hot compaction method were reversely calculated.