采用原位聚合法制得聚环状对苯二甲酸丁二醇酯/多壁碳纳米管(pCBT/MWCNT)纳米复合材料,研究了复合体系的流变行为。研究结果表明:酸化后的MWCNT变短,分散性能明显变好,在MWCNT酸化时间为3h,用量为0.5%条件下,制得的pCBT/MWCNT纳米复合材料的拉伸强度、拉伸模量和弯曲模量达到最大,分别为57.1MPa、1345.3MPa和2754.7MPa,弯曲强度达到93.3MPa,具有较好的力学性能。
The polycyclic butylene terephthalate/multiwalled carbon nanotubes (pCBT/MWCNT) nanocomposites were prepared by in-situ polymerization of cyclic butylene terephthalate oligomers (CBT),and the polymerization kinetics of pCBT/MWCNT was monitored by dynamic time sweep in a parallel-plate rheometer.MWCNT became shorter and dispersed more homogeneous after acidification.pCBT/MWCNT had excellent mechanical properties,the tensile strength,tensile modulus,bend strength and bend modulus of nanocomposites with 0.5% content of MWCNT could reach 57.1MPa,1345.3MPa,93.3MPa and 2754.7MPa respectively.
[1] Tripathy A R,Elmoumni A,Winter H H,et al.Effects of catalyst and polymerization temperature on the in-situ polymerization of cyclic poly(butylene terephthalate) oligomers for composite applications[J].Macromolecules,2005,38(3):709-715.
[2] Burch R R,Lustig S R,Spinu M.Synthesis of cyclic oligoesters and their rapid polymerization to high molecular weight[J].Macromolecules,2000,33(14):5053-5064.
[3] Ishak Z A,Gotus K G,Karger-Kocsis J.On the in-situ polymerization of cyclic butylene terephthalate oligomers:DSC and rheological studies[J].Polymer Engineering and Science,2006,46(6):743-750.
[4] Zhang J Q,Wang Z B,Wang B J,et al.Living lamellar crystal initiating polymerization and brittleness mechanism investigations based on crystallization during the ring-opening of cyclic butylene terephthalate oligomers[J].Polymer Chemistry,2013,4(5):1648-1656.
[5] Samsudin S A,Kukureka S N,Jenkins M J.The equilibrium melting temperature and isothermal crystallisation kinetics of cyclic poly(butylene terephthalate) and styrene maleimide (c-PBT/SMI) blends[J].Journal of Thermal Analysis and Calorimetry,2013,114(3):1307-1315.
[6] 张乃斌.浅议环状聚酯CBT树脂[J].塑料制造,2006(8):55-59.
[7] Parton H,Baets J,Lipnik P,et al.Properties of poly(butylene terephthatlate) polymerized from cyclic oligomers and its composites[J].Polymer,2005,46(23):9871-9880.
[8] 张靠民,李敏,顾软卓,等.汽车用先进复合材料的低成本技术[J].玻璃钢/复合材料,2012(S1):226-231.
[9] 陈亚君,吴国庆,倪红军,等.风力发电机组叶片材料综述[J].化工新型材料,2010,38(9):37-38.
[10] Noh Y J,Lee S,Kim S Y,et al.High-speed fabrication of thermoplastic carbon fiber fabric composites with a polymerizable,low-viscosity cyclic butylene terephthalate matrix for automotive applications[J].Macromolecular Research,2014,22(5):528-533.
[11] Yang B,Zhang J F,Zhou L M,et al.Effect of fiber surface modification on water absorption and hydrothermal aging behaviors of GF/pCBT composites[J].Composites Part B-Engineering,2015,82:84-91.
[12] Tzounis L,Gartner T,Liebscher M,et al.Influence of a cyclic butylene terephthalate oligomer on the processability and thermoelectric properties of polycarbonate/MWCNT nanocomposites[J].Polymer,2014,55(21):5381-5388.
[13] Song J B,Zhang W B,Yang W B,et al.Rheological properties,morphology,mechanical properties,electrical resistivity and EMI SE of cyclic butylene terephthalate/graphite/carbon black composites[J].Journal of Polymer Research,2014,21(9):556-564.
[14] Hong S C,Lee S S.Temperature-dependent decyclopolymerization of cyclic oligomers and the implication on destructuring layered nanosheets for nanocomposite reinforcement[J].Composites Science and Technology,2013,86:170-176.
[15] Chen H L,Huang A W,Yu W,et al.Effect of thermally reduced graphite oxide (TrGO) on the polymerization kinetics of poly(butylene terephthalate)(pCBT)/TrGO nanocomposites prepared by in situ ring-opening polymerization of cyclic butylene terephthalate[J].Polymer,2013,54(6):1603-1611.
基金资助
上海市自然科学基金(15ZR1401100)
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