β-成核剂对聚丙烯/木粉复合材料结晶与力学性能的影响  

Influence ofβNucleating Agent on the Crystallization and Mechanical Properties of PP/Wood Flour Composites

作　　者：黄浪[1] 王海刚[1] 王清文[1] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040

出　　处：《高分子材料科学与工程》2015年第1期83-87,共5页Polymer Materials Science & Engineering

基　　金：林业公益性行业科研专项(201204802);国家自然科学基金资助项目(31170529);中央高校基本科研业务费专项资金(DL11BB37)

摘　　要：通过挤出成型法制备聚丙烯/木粉复合材料(PP/WF),添加一种镧系稀土金属络合物(WBG)成核剂诱导PP/WF复合材料中等规聚丙烯(iPP)形成β晶型。以差示扫描量热和X射线衍射为表征方法,分析成核剂对PP/WF结晶行为的作用,进而研究其对力学性能的影响。结果表明,WBG成核剂能有效地诱导PP/WF产生β-iPP结晶,当WBG的添加量为m(WBG)/m(PP)=0.3/100时其产生的β晶相对含量达到78.75%,β-iPP的相对含量还与PP/WF的冷却速率密切相关;添加WBG提高了复合材料中iPP的结晶温度;WBG成核剂能显著改善复合材料的冲击韧性,但对弯曲和拉伸性能略有不利影响。The rare earth metal complexes(called WBG)nucleating agent was added to the polypropylene/wood flour(PP/WF)composites by extrusion to induce theβphase crystallization of PP in the composite.The resulting composites were characterized by X-ray diffraction and differential scanning calorimetry.The mechanical properties were also tested.The results indicate that addition of WBG induces PP in the composite to formβ-crystal(β-iPP)efficiently during the crystallization and improve the crystallization temperature of the composites,but the content ofβ-iPP is influenced by the cooling rate.The relative content ofβ-iPP can be as high as 78.75% when the dosage of WBG is m(WBG)/m(PP)=0.3/100.PP/WF composites withβ-iPP crystal exhibit significant improvement on the impact strength while slight decrease on the flexural strength and tensile strength.

关 键 词：木塑复合材料 镧系稀土金属络合物成核剂 等规聚丙烯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TB33[一般工业技术—材料科学与工程]