Improved Tensile Strength and Thermal Stability of Thermoplastic Carbon Fiber Fabric Composites by Heat Induced Crystallization of In Situ Polymerizable Cyclic Butylene Terephthalate Oligomers
Improved Tensile Strength and Thermal Stability of Thermoplastic Carbon Fiber Fabric Composites by Heat Induced Crystallization of In Situ Polymerizable Cyclic Butylene Terephthalate Oligomers
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DOI：
10.1002/pen.23765
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发表时间：
2014-09-01
影响因子：
3.2
通讯作者：
Youn, Jae Ryoun
中科院分区：
文献类型：
--
作者：
Kim, Sung Ho;Noh, Ye Ji;Youn, Jae Ryoun
采用低粘度可聚合环对苯二甲酸丁二醇酯（CBT）树脂，采用一种新的快速制备工艺制备了热塑性碳纤维织物增强复合材料（CFFRCs）。研究了热处理对复合材料结构和性能的影响，为CFFRCs的快速生产和降低加工成本提供了合适的后处理工艺。基于差示扫描量热法、广角X射线衍射和热重分析，在200 ℃下退火120 min导致聚合的CBT（pCBT）的机械性能和热稳定性改善。在250 ℃下压缩成型2分钟的CFFRC的拉伸强度为440 MPa，并且在压缩成型后在200 ℃下退火120分钟的CFFRC的拉伸强度为500 MPa，这相对于pCBT基质分别提高了550%和625%。此外，在250 ℃下退火120 min的CFFRC的热稳定性提高了10 ℃。因此，通过采用适当的退火条件，可以提高所制造的CFFRC的抗拉强度和热稳定性。(C)2013年塑料工程师学会
Thermoplastic carbon fiber fabric reinforced composites (CFFRCs) were prepared using a novel fast manufacturing process with a low viscosity polymerizable cyclic butylene terephthalate (CBT) resin. Structure and properties of the composites altered by thermal annealing were investigated to develop appropriate post processing of the CFFRCs for fast production and lowering the processing cost. Annealing at 200 degrees C for 120 min resulted in improved mechanical properties and thermal stability of the polymerized CBT (pCBT) based on differential scanning calorimetry, wide-angle X-ray diffraction, and thermo gravimetric analysis. The tensile strength of the CFFRC compression molded at 250 degrees C for 2 min was 440 MPa and that of the CFFRC annealed at 200 degrees C for 120 min after compression molding was 500 MPa, which is an improvement of 550 and 625% relative to the pCBT matrix, respectively. In addition, the thermal stability of the CFFRC annealed at 250 degrees C for 120 min improved by 10 degrees C. Therefore, tensile strength and thermal stability of the manufactured CFFRC can be improved by using the appropriate annealing conditions. (C) 2013 Society of Plastics Engineers