Triblock copolymers and pentablock terpolymers of n‐hexyl isocyanate with styrene and isoprene: Synthesis, characterization, and thermal properties
Triblock copolymers and pentablock terpolymers of n‐hexyl isocyanate with styrene and isoprene: Synthesis, characterization, and thermal properties
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DOI：
10.1002/pola.10882
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发表时间：
2003-10
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影响因子：
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通讯作者：
Aggelos Vazaios;M. Pitsikalis;N. Hadjichristidis
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文献类型：
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作者：
Aggelos Vazaios;M. Pitsikalis;N. Hadjichristidis
异氰酸正己酯（H）、苯乙烯（S）和异戊二烯（I）的三嵌段共聚物和五嵌段三元共聚物的类型HSH（六个样品，Mn：49-163 K，H的重量%：5-59）、HIH（两个样品，Mn：75和83.4 K，H的重量%：16和40）、HSISH（一个样品，Mn：79.4 K，H的重量%：13）和HISIH（一个样品，Mn：128 K，H的重量%：25）通过高真空技术在四氢呋喃中在−98 °C下用萘钠/四苯硼酸钠引发体系合成。所有材料均通过尺寸排阻色谱法、膜渗透压测定法和1H NMR进行表征。组合的分子表征结果揭示了高度的分子和组成均匀性。采用热重分析和差示扫描量热法对合成材料的热性能进行了研究。© 2003 Wiley Periodicals，Inc.聚合物科学杂志A部分：聚合物化学41：3094-3102，2003
Triblock copolymers and pentablock terpolymers of n-hexyl isocyanate (H), styrene (S), and isoprene (I) of the type HSH (six samples, Mn:49–163 K, weight % of H:5–59), HIH (two samples, Mn:75 and 83.4 K, weight % of H:16 and 40), HSISH (one sample, Mn:79.4 K, weight % of H:13), and HISIH (one sample, Mn:128 K, weight % of H:25) were synthesized by high-vacuum techniques in tetrahydrofuran at −98 °C with the sodium naphthalene/sodium tetraphenylborate initiating system. All materials were characterized by size exclusion chromatography, membrane osmometry, and 1H NMR. The combined molecular characterization results revealed a high degree of molecular and compositional homogeneity. The thermal properties of the synthesized materials were examined by thermogravimetric analysis and differential scanning calorimetry. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 3094–3102, 2003