二氯二茂钛引发二苯乙炔聚合的研究

来源 :高分子学报 | 被引量 : 0次 | 上传用户:liyanxia8521
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
在高温下 ,二氯二茂钛受光照引发二苯乙炔聚合 ,得到结晶度为 95 %的聚二苯乙炔 .经红外、质谱、热分析、X光衍射、元素分析等方法 ,确定其结构为顺顺式螺旋刚性棒状结构 ,形成假六方晶系堆积 ,螺旋柱直径即螺旋轴间距为 1 46nm ,其特征红外吸收峰位于 1179cm-1和 115 6cm-1.在聚合引发阶段中止反应 ,分离出聚合中间体六苯基苯 .根据不同温度时聚合转化率与时间的关系曲线 ,测得聚合活化能为 2 6× 10 5J/mol.热分析表明 ,结晶聚二苯乙炔在 493K至 5 73K比较稳定 ;在 713K的吸热峰显示出破坏晶格的能量 .根据聚合反应诱导期长、中间体和聚合物的结构以及阻聚反应 ,推断聚合过程中二氯二茂钛受光照产生二氯化钛 ,催化二苯乙炔进行均相定向聚合 .结晶聚二苯乙炔电导率小于 10 -12 (Ωcm) -1. Under high temperature, the titanocene was polymerized by light irradiation of titanocene to obtain poly (diphenylacetylene) with 95% crystallinity.The structure was determined by infrared, mass spectrometry, thermal analysis, X-ray diffraction and elemental analysis Cis-type spiral rigid rod-like structure, the formation of pseudo-hexagonal system accumulation, helical column diameter or helical axis spacing of 1 46nm, the characteristic infrared absorption peaks at 1179cm-1 and 1156cm-1 in the polymerization initiation phase of the reaction was isolated According to the curve of the polymerization conversion rate versus time at different temperatures, the activation energy of polymerization was measured to be 26 × 10 5 J / mol. The thermal analysis showed that the crystallization of poly (styrenephthalate) at 493K to 5 73K And the endothermic peak at 713K shows the energy to destroy the crystal lattice.According to the long induction period of the polymerization reaction, the structure of the intermediate and the polymer and the polymerization inhibition reaction, it is deduced that during the polymerization, the titanocene dichloride Titanium, and catalyzed stilbene for homogeneous orientation polymerization.The conductivity of the crystalline poly (diphenylacetylene) is less than 10 -12 (Ωcm) -1.
其他文献
Calcium hydroxide with uniform diameters about 50-100 nm was firstly prepared under moderate condition by adding different kinds of hydrosoluble polymers. From
With the consideration of the visco-elasticity,the adsorption effect and the variation of rheological parameters, a seepage flow model of visco-elastic polymer
A high order finite difference scheme for solving the Regularised Long Wave (RLW) equation, based on the high order Pade approximation and Lax-Wendroff type tim
This paper is concerned with the convergence rates to travelling waves for a relaxation model with general flux functions. Compared with former results in this
2-Chloro-5-methylpyridine can be effectively isolated from its isomer 2-chloro-3- methyl-pyridine in the form of Cu2+complex. After hydrolyzing the complex, it
通过(η5-RC5H4)MCoFeS(CO)8(la:M=Mo,R=H;1b:M=Mo,R=MeO2C;lc:M=Mo,R=Me;1d:M=Mo,R=EtO2C;1e:M=W R=H)与Cp2Ni的等瓣置换反应合成了簇合物(η5-C5H5)(η5-RC5H4)MNiFeS(CO)5
首次报道从中国南海海绵Polymastiasobustia中分离得到 5个纯化合物 ,经过MS ,IR ,1 HNMR ,1 3CNMR(DEPT) ,HMQC和HMBC等波谱技术鉴定为 :豆甾 5 烯 7 羰基 3β 甾醇 (1) ,
利用水热方法合成了纯度较高的六方结构的 NaGdF4,在氧气存在条件下 950℃加热处理可以使其转变为 CaF2型立方结构。在真空紫外光激发下,六方结构的 NaGdF4∶ Eu3+中的 Gd3+离子
采用类凝胶-超临界流体干燥法制备了超细Mo-Co-K催化剂,并运用TEM和选区电子衍射技术对制得的催化剂进行了表征.结果表明,制得的催化剂由属于超细粒子范畴的片状微晶和球状小
基于详细机理动力学的研究成果 ,讨论了费 托合成单颗粒催化剂在液蜡填充情形下的详细模型化问题 ,建立了针对这一复杂多重反应体系的多组分扩散 反应的等温和非等温颗粒模