Academic Journal
Kinetics and thermal properties of polydiethylsiloxane initiated by potassium trimethylsilanolate
| العنوان: | Kinetics and thermal properties of polydiethylsiloxane initiated by potassium trimethylsilanolate |
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| المؤلفون: | Ji, Yanwei, Zhao, Yan, Xu, Rui, Dai, Lina, Zhang, Zhijie, Fei, Hua‐Feng |
| المصدر: | Journal of Applied Polymer Science ; volume 141, issue 13 ; ISSN 0021-8995 1097-4628 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2024 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | This work reports the kinetics of anionic ring‐opening polymerization of hexaethylcyclotrisiloxane (D 3 Et ) with potassium trimethylsilanolate as initiator and diglyme and N , N ‐dimethylformamide (DMF) as promoters. The polymerization rate of D 3 Et is influenced by the nature of promoters and the reaction temperatures. With the use of DMF as a promoter, the polymerization activation energy is 107.89 kJ/mol, and the polymerization rate constant at 110°C is 0.08466 min −1 with [P]/[I] = 3.0. Gel permeation chromatography and 29 Si NMR spectra showed that the intermolecular redistribution occurred during the late stage of polymerization, which facilitated the synthesis of high‐molecular‐weight polydiethylsiloxane (PDES). Differential scanning calorimetry analysis showed that PDES exhibited a glass transition temperature of −142°C and complex crystallization phenomena. Thermogravimetric analysis illustrated that the PDES that was prepared using this method had good thermal stability with onset decomposition temperatures of 483 and 452°C under nitrogen and air conditions, respectively. This work presents innovative approaches for achieving a more energy‐efficient synthesis of PDES to meet the demands of industrial‐scale production. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1002/app.55147 |
| الاتاحة: | http://dx.doi.org/10.1002/app.55147 https://onlinelibrary.wiley.com/doi/pdf/10.1002/app.55147 |
| Rights: | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.DDCBFBA5 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/app.55147 |
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