Study on preparation and properties of polyether polytriazole elastomers
Study on preparation and properties of polyether polytriazole elastomers
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聚醚聚三唑弹性体的制备及性能研究
DOI：
10.1007/s10118-015-1610-6
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发表时间：
2015-02
影响因子：
4.3
通讯作者：
Yang Rong-jie
中科院分区：
文献类型：
--
作者：
Zhai Jin-xian;Qu Zheng-yang;Zou Ye-cheng;Guo Xiao-yan;Yang Rong-jie
为探索点击化学在弹性体材料领域的应用，以端羟基环氧乙烷-四氢呋喃共聚物（P（E-co-T））为原料，通过端醚化改性，制备了端炔丙基环氧乙烷-四氢呋喃共聚物（PTP（E-co-T））。FTIR和13 C-NMR结果表明，端羟基的醚化反应完全，得到了目标产物PTP（E-co-T），其端炔基含量为0.428 mmol·g−1。以聚叠氮化合物为交联剂，通过CuAAC反应，由PTP（E-co-T）合成了不同官能度摩尔比（R）的聚三唑弹性体。力学性能测试表明，随着R的增大，弹性体的模量E和应力σ b先增大后减小，应变先减小后增大。聚三唑弹性体的力学性能与R值呈抛物线关系。在化学计量比附近，E和σ b出现最大值，应变σ b出现最小值。溶胀试验表明，聚三唑弹性体股线的表观分子量也先降低，然后增加。在化学计量比下，网络结构具有最小表观分子量和最大表观密度的链。动态力学分析表明，聚三唑弹性体在约−64 °C处呈现阻尼峰，对应于共聚醚链的玻璃化转变，并且弹性体在化学计量比下表现出最低的耗散因子tanδ。热分析表明，聚三唑弹性体的失重过程是一步分解的特征，弹性体从聚醚链开始分解，而不是三唑基团。
To explore the application of click chemistry in the field of elastomer materials, propargyl-terminated ethylene oxide-tetrahydrofuran copolymer (PTP(E-co-T)) was prepared from hydroxyl-terminated ethylene oxide-tetrahydrofuran copolymer (P(E-co-T)) by end-etherisation modification. FTIR and13C-NMR results indicate that P(E-co-T)-terminated hydroxyl was etherified thoroughly, yielding the target product PTP(E-co-T), and the content of terminated alkynyl of PTP(E-co-T) was evaluated to be 0.428 mmol·g−1. Using a polyazide compound as a cross-linker, polytriazole elastomers with various functional molar ratio (R) values were prepared from PTP(E-co-T) by virtue of the CuAAC reaction. Mechanical property tests indicate that with the increase inR, the modulusEand stressσbof the polytriazole elastomers first increase and subsequently decrease, whereas the strain first decreases and later increases. The mechanical properties of the polytriazole elastomers show a parabolic dependence on theRvalue. Near the stoichiometric ratio,Eandσbshow maxima and the strainɛbshows a minimum. Swelling tests demonstrate that the apparent molecular weight of polytriazole elastomer strands also first decreases and subsequently increases. At the stoichiometric ratio, the network structure possesses strands with a minimum apparent molecular weight and a maximum apparent density. Dynamic mechanical analysis reveals that the polytriazole elastomers presented damping peaks at approximately −64 °C, corresponding to the glass transition of copolyether strands, and the elastomer exhibited the lowest dissipation factor tanδat the stoichiometric ratio. Thermal analysis suggests that the weight-loss process of the polytriazole elastomer is characteristic of one-step decomposition, and the elastomer begins to decompose from polyether strands, not triazole groups.
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影响因子：
3.9
作者：
Van Krevelen
通讯作者：
Van Krevelen
影响因子：
5.5
作者：
Wanjuan Wang;Ting Li;T. Yu;Fangming Zhu
通讯作者：
Wanjuan Wang;Ting Li;T. Yu;Fangming Zhu
影响因子：
64.8
作者：
W. J. Naunton
通讯作者：
W. J. Naunton
影响因子：
9.1
作者：
R. Stephen;K. Joseph;Z. Oommen;Sabu Thomas
通讯作者：
R. Stephen;K. Joseph;Z. Oommen;Sabu Thomas
影响因子：
9.5
作者：
Youhong Tang;C. K. W. Jim;Yang Liu;L. Ye;A. Qin;J. Lam;Chengbi Zhao;B. Tang
通讯作者：
Youhong Tang;C. K. W. Jim;Yang Liu;L. Ye;A. Qin;J. Lam;Chengbi Zhao;B. Tang