中国塑料2025，Vol.39Issue(11)：27-31,5.DOI:10.19491/j.issn.1001-9278.2025.11.005
发泡剂热解行为及其产气量对聚丙烯基微孔木塑复合材料性能的影响
Thermal decomposition behavior of foaming agent and its influence of gas yield on properties of microporous PP-based wood-plastic composites
摘要
Abstract
To address the high density and low toughness of conventional wood-plastic composites(WPCs),this study employed chemical foaming technology to introduce a microcellular structure into the material.Subsequent crack passiv-ation and other methods were applied to achieve simultaneous enhancement and toughening,thereby facilitating high-per-formance applications of WPCs.Using azodicarbonamide(ADC)and sodium bicarbonate(SBC)as foaming agents,the influence of their pyrolysis behavior on cellular morphology was investigated through thermal stability analysis.Formula optimization was further conducted to examine the effect of gas production rate on the mechanical properties of the com-posites.The results indicated that,compared to SBC-based foam masterbatch,ADC foaming agent compounded with zinc oxide was easier to yield a"fine and dense"microcellular structure.At an optimal dosage of 1 phr,a microporous structure with an average cell size of 71 μm and a cell density of 2.7×104 cells/cm3 was achieved.The corresponding im-pact strength,tensile strength,and flexural strength of the composite reached 6 kJ/m2,9.7 MPa,and 22.1 MPa,re-spectively.关键词
木塑复合材料/聚丙烯/发泡剂/挤出成型/微孔塑料Key words
wood plastic composite material/polypropylene/foaming agent/extrusion molding/microporous plastic分类
化学化工引用本文复制引用
王苏炜,胡平,宗胡曾,薛平..发泡剂热解行为及其产气量对聚丙烯基微孔木塑复合材料性能的影响[J].中国塑料,2025,39(11):27-31,5.基金项目
中央高校基本科研业务费专项资金(30923011018) （30923011018）
