Thermoplastic Polyurethane Elastomer Melt Polymerization Study
Thermoplastic Polyurethane Elastomer Melt Polymerization Study
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DOI：
10.5254/1.3535862
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发表时间：
1982-03
影响因子：
1.5
通讯作者：
C. S. Schollenberger;K. Dinbergs;F. D. Stewart
中科院分区：
文献类型：
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作者：
C. S. Schollenberger;K. Dinbergs;F. D. Stewart
本文认为，对Brabender PlastiCorder转矩流变仪稍加改进，可用于热塑性聚氨酯弹性体熔融聚合的研究。该仪器在很宽的范围内具有足够的灵敏度和响应性，可以连续地感测和记录聚合物温度和粘度随时间的变化，即使是很小的变化。这种能力使我们能够跟踪这种聚合的整个过程，除了通常在静止状态下进行的最终聚合物熟化过程。在我们的研究中，几个聚合变量的影响是明确和定量明显的，包括对聚合过程及其程度的影响：大乙二醇酸度;抗氧化剂（稳定剂）;温度;催化剂;聚合物组合物;存在的shortstop;和反应物平衡。结果表明，已知的酸催化羟基异氰酸酯反应以及聚氨酯分子量。
Abstract It is concluded from the present study that the slightly modified Brabender PlastiCorder torque rheometer is well suited to the study of thermoplastic polyurethane elastomer melt polymerization. The instrument is sensitive and responsive enough over a broad range to sense and record continuously even small changes in polymerizate temperature and viscosity as a function of time. This capability has enabled us to follow the full course of such polymerizations, with the exception of the final polymer maturation process which customarily is effected in the quiescent state. In our study, the effects of several polymerization variables were clearly and quantitatively apparent, including the effects on the course of polymerization and its degree of: macroglycol acidity; antioxidant (stabilizer); temperature; catalyst; polymer composition; presence of shortstop; and reactant balance. The results demonstrate the known acid catalysis of the hydroxyl-isocyanate reaction as well as polyurethane molecular wei...