以辛酸亚锡为引发剂开环聚合制备了聚己内酯(PCL),用GPC、DSC、XRD和FT-IR进行表征.将PCL与N990用炭黑以溶剂法复合制备了PTC复合材料,研究其微观结构、体积膨胀和电性能.结果表明:PCL的数均分子量(Mn)、重均分子量(Mw)以及分子量分布宽度(Mn/Mw)分别为24175、38666和1.60,熔点为62℃,结晶度为42.48%.复合材料的渗流阈值为35%,PTC强度都大于2个数量级.N990炭黑在复合材料中分布较均匀,主要以聚集体的形式存在.复合材料的电阻率对数值-体积膨胀率曲线表明,体积膨胀只是复合材料PTC效应的一个重要因素.
参考文献
| [1] | Corres M(A);Mugica A;Carrasco P M et al.Effect of crystallization on morphology-conductivity relationship in polypyrrole/poly(ε-caprolactone)blends[J].Polymer,2006,47:6759-6764. |
| [2] | Mecerreyes D;Stevens R;Nguyen C et al.Synthesis and characterization of polypyrrole-graft-poly(ε-caprolactone)copolymers:new electrically conductive nanocomposites[J].Synthetic Metals,2002,126:173-178. |
| [3] | Erh-Chiang Chen;Tzong-Ming Wu .Isothermal crystallization kinetics and thermal behavior of poly(ε-caprolactone)/multi-walled carbon nanotube composites[J].Polymer Degradation and Stability,2007(6):1009-1015. |
| [4] | Thomassin J M;Lou X D;Pagnoulle C .Multiwalled Carbon Nanotube/Poly(ε-caprolactone)Nanocomposites with Exceptional Electromagnetic Interference Shielding Properties[J].Journal of Physical Chemistry C,2007,111:11186-11192. |
| [5] | Tsubokawa N.;Chen J.;Nakazawa Y.;Tsuchida M. .A novel contamination sensor in solution: the response of the electric resistance of a composite based on crystalline polymer-grafted carbon black[J].Sensors and Actuators, B. Chemical,2001(2/3):92-97. |
| [6] | Ginzburg VV;Myers K;Malowinski S;Cieslinski R;Elwell M;Bernius M .High-dielectric-constant self-assembled nodular structures in polymer/gold nanoparticle films[J].Macromolecules,2006(11):3901-3906. |
| [7] | 秦瑞丰,朱光明,杜宗罡,崔晓萍,张龙彬.电致形状记忆聚己内酯/炭黑复合导电高分子材料的研究[J].中国塑料,2005(05):23-28. |
| [8] | 鲁国明;白续铎;汪成.聚ε-己内酯本体聚合的研究[J].化学工程师,1999(04):12-13. |
| [9] | 王永亮,易国斌,康正,熊富华,周平,崔亦华.聚己内酯的合成与应用研究进展[J].化学与生物工程,2006(03):1-3,9. |
| [10] | Song Ying;Liu Lijian;Weng Xiaocheng et al.Acid-initiated polymerization of ε-caprolactone un-der microwave irradiation and its application in the preparation of drug controlled release system[J].Journal of Biomaterials Science:Polymer Edition,2003,14:241-254. |
| [11] | Amin Cao;Takashi Okamura;Chieko .Studies on syntheses and physical characterization of biodegradable aliphatic poly(butylene succinate-co-ε-caprolactone)s[J].POLYMER,2002,43:671-679. |
| [12] | Lostocco MR.;Cameron JA.;Huang SJ.;Murphy CA. .The effects of primary structure on the degradation of poly(epsilon-caprolactone)/poly(L-lactide) block copolymers[J].Polymer Degradation and Stability,1998(1/3):303-307. |
| [13] | 蒋世春,姬相玲,安立佳,姜炳政.聚己内酯在有机/无机杂化体系中的受限结晶行为[J].高分子学报,2000(04):452-456. |
| [14] | Hu H;Dorset D L .Crystal Structure of Poly(ecapro1actone)[J].MACROMOLECULES,1990,23:4604-4607. |
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