解键剂用于PBS-CTMP复合材料界面改性的研究

Interfacial Modification Effect of Debonder in Poly (Butylene Succinate)- Chemithermomechnical Pulp Fiber Composites

关键词:  解键剂  PBS  CTMP纤维  复合材料  界面改性

Key Words:debonder  PBS  CTMP fiber  composite  interfacial modification

摘要:以解键剂对化学热磨机械浆（CTMP）进行预处理,然后通过熔融加工制备聚丁二酸丁二酯(PBS)-CTMP复合材料,对复合材料的力学性能、流变性能进行测试,并对其进行动态力学分析和形貌学表征。结果表明,解键剂处理削弱了CTMP纤维间的结合强度,以经解键剂处理后的纤维制备的复合材料力学性能显著提高。与未处理的CTMP相比,CTMP经质量分数0.50%(相对于纤维)的解键剂处理后,含质量分数40%CTMP的复合材料拉伸强度、冲击强度和弯曲强度分别提高了21.9%、22.3%和35.4%。解键剂的加入,降低了复合材料的剪切黏度,在复合材料体系中起到了润滑剂的作用,对其加工制备起到积极作用。DMA和SEM的分析结果表明,采用解键剂对CTMP进行处理后,CTMP纤维与PBS基体间的界面结合增强。

Abstract:Debonder, a kind of bond weakening reagent usually used in the production of fluff pulp, was used as interfacial modifier in poly (butylene succinate (PBS)-chemithermomechnical pulp (CTMP) fiber composites. Physical properties measurement of handsheets prepared with debonder treated fibers indicated that the bonding strength between fibers was sharply decreased. The mechanical property of composites prepared from treated fiber showed significant improvement. In comparison with untreated ones, the tensile strength, impact strength and bending strength of composites containing 40% of CTMP fiber treated with 0.50% debonder increased by 21.9%, 22.3% and 35.4%, respectively. Furthermore, the data of rheological measurement indicated that the addition of debonder reduced the shear viscosity of composite, and favored the processing process of composite. Analysis of DMA and SEM showed that the interfacial bonding between treated CTMP fiber and PBS matrix was improved.