CAJ | 학술논문

采用锥形双螺杆挤出法制备了竹浆板纤维增强高密度聚乙烯复合材料，并通过热重分析仪（ TGA）、差热扫描量热议（ DSC）、热机械分析仪（ DMA）等对其热稳定性、熔融温度、结晶度及热机械性能进行测试分析，研究了竹浆板纤维质量分数对其复合材料热性能的影响。结果表明，竹浆板纤维降低了复合材料起始分解温度，提高了复合材料的残炭率及高温热稳定性；但对复合材料的结晶和熔融峰值温度没有影响，竹浆纤维增强复合材料结晶度随着纤维质量分数的增加而略有提高，但均低于纯高密度聚乙烯的结晶度；纤维质量分数为30％时，复合材料储存模量最高，损耗因子最小。
채용추형쌍라간제출법제비료죽장판섬유증강고밀도취을희복합재료，병통과열중분석의（ TGA）、차열소묘량열의（ DSC）、열궤계분석의（ DMA）등대기열은정성、용융온도、결정도급열궤계성능진행측시분석，연구료죽장판섬유질량분수대기복합재료열성능적영향。결과표명，죽장판섬유강저료복합재료기시분해온도，제고료복합재료적잔탄솔급고온열은정성；단대복합재료적결정화용융봉치온도몰유영향，죽장섬유증강복합재료결정도수착섬유질량분수적증가이략유제고，단균저우순고밀도취을희적결정도；섬유질량분수위30％시，복합재료저존모량최고，손모인자최소。
By the twin-screw extrusion method , bamboo pulp fiber reinforcing high-density polyethylene composites were pre-pared and the thermogravimetric analysis ( TGA) , differential scanning calorimetry ( DSC) and dynamic mechanical analy-sis (DMA) were employed to study the resultant composites ’ thermal stability, melting temperature, crystalline degree and thermo-mechanical properties , respectively , in different bamboo fiber contents .As the bamboo fiber content increases , the initial decomposition temperature of composites decreases , while the amount of char yield and resultant composites ’ thermal stability in high temperature increased .There is no significant effect in the crystallization and melting temperature of composites.The degree of crystallinity of composites can be slightly improved with the increasing amount of bamboo pulp fibers, but still lower than that of neat PP .The bamboo fibers /HDPE composites with the bamboo pulp fiber content of 30%are with higher storage modulus and lower loss factor .