Materials Reports 2022, Vol. 36 Issue (Z1): 21070206-6 |
POLYMERS AND POLYMER MATRIX COMPOSITES |
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Study on Influencing Factors of Preparation of PBS-STG and Its Rheological Properties at Different Temperatures |
LIN Huan1,2, SHI Qiliang2, CAI Lihai1, LIU Wenyan2, LI Wanli1
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1 Institute of Military New Energy Technology, Institute of Systems Engineering, Academy of Military Sciences, Beijing 102300, China 2 School of Mechanical Electronic & Information Engineering, China University of Mining & Technology, Beijing 100083, China |
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Abstract Polyborodimethylsiloxanes shear thickening gel (PBS-STG) has a great application prospect in the field of protective material; however, there were few reports on the preparation conditions and stability of PBS-STG in natural environment.In this work, the effects of the ratio of raw materials, reaction time, reaction temperature, viscosity of dimethyl silicone oil on the preparation of PBS-STG and the rheological properties of PBS-STG at different temperatures were systematically studied. The preparation conditions of PBS-STG were as follows: the viscosity of dimethyl silicone oil was 350 Pa·s, the ratio of boric acid and dimethyl silicone oil approached n(B)∶n(Si) was 1∶10, the temperature was slowly increased to 240 ℃, and the reaction time was more than 6 h. The experimental results at variable temperature indicated that PBS-STG had stable shear thickening characteristics from -40 ℃ to 40 ℃, and presented the best shear thickening characteristics at 10 ℃, which showed important guiding significance for the application of PBS-STG in the protection field.
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Published: 05 June 2022
Online: 2022-06-08
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