Damping and Self-Healing Properties of Polyborosiloxane Composites

作者：Wang, Junhao; Xu, Weibing^*; Li, Zheng; Zhou, Zhengfa; Ren, Fengmei; Ma, Haihong; Zhang, Wei

来源：Polymer Materials Science and Engineering, 2018, 34(10): 84-90.

DOI：10.16865/j.cnki.1000-7555.2018.10.015

• Fracture surfaces
• Polyborosiloxane
• Reaction temperature
• Self-healing
• Self-healing properties
• Shear thickening
• Synthesis temperatures
• Water recovery rates

A highly damped self repairing material containing dynamic noncovalent bonds was synthesized by the combination of polyborosiloxane gel (PBS-Gel) and methyl vinyl silicone rubber(VMQ). PBS-Gel was synthesized by the condensation reaction of boric acid and hydroxy silicone oil. In order to study the influence of the synthesis temperature and VMQ content on the properties of the material, the samples were analyzed and characterized by FT-IR-ATR, rheometer and DMA. The results show that when the synthesis temperature increases, the damping property of the gel becomes worse. When the reaction temperature is 120℃, the gel damping property is the best, the highest loss factor is 2.97, and the temperature range of tanδ>0.3 is 110℃. When the mass fraction of VMQ is 25%, the damping and self-healing properties of PBS-Gel/VMQ composite material are the best, the highest loss factor is 1.38, the temperature range of tanδ>0.3 is 156℃, the tensile strength can be restored to 72% after healed 1 d, the fracture surface of the sample after treatment by water recovery rate can reach 95%. In addition, based on the experimental phenomena and the previous research, a theory of breaking and self-healing of "secondary bonds "is proposed to explain the high damping and self repairing properties of materials.

• 出版日期2018
• 单位合肥工业大学