增塑剂含量对光纤环圈固化胶性能的影响

The Influence of Plasticizer Content on the Properties of Optical Fiber Coil Curing Adhesive

摘要

为提升光纤陀螺在复杂工况的环境适应性，本研究旨在探究增塑剂对苯二甲酸二辛酯（DOTP）对光纤环圈固化胶性能的调控作用。系统研究了DOTP添加量对固化胶热稳定性、力学性能及工艺黏度的影响规律。结果表明，DOTP通过屏蔽PUA分子链间的相互作用力，有效降低了固化胶的玻璃化温度与黏度。当DOTP添加量为6 wt%（PUA-T2）时，固化胶表现出最优的综合性能：热稳定性优良，断裂伸长率较未改性PUA提升了28.06%，且黏度适宜。光纤环圈温度循环测试进一步表明，采用PUA-T2胶绕制的光纤环在零偏稳定性及极差方面均优于未改性胶样，证实了该优化配方在提升光纤陀螺环境适应性方面的应用潜力。

Abstract

To enhance the environmental adaptability of fiber optic gyroscopes (FOGs) under complex working conditions, this study aims to investigate the regulatory effect of the plasticizer dioctyl terephthalate (DOTP) on the properties of the adhesive used for optical fiber coil curing. The influence of DOTP content on the thermal stability, mechanical properties, and process viscosity of the cured adhesive was systematically studied. Results indicate that DOTP effectively reduces the glass transition temperature and viscosity of the adhesive by shielding the intermolecular interactions in the polyurethane acrylate (PUA) chains. When the DOTP content is 6 wt% (PUA-T2), the cured adhesive exhibits optimal overall performance: excellent thermal stability, a 28.06% increase in elongation at break compared to unmodified PUA, and suitable viscosity. Temperature cycling tests of the optical fiber coils further demonstrate that coils wound with PUA-T2 adhesive show better bias stability and range performance than those with unmodified adhesive, confirming the potential of this optimized formulation for improving the environmental adaptability of FOGs.

关键词

光纤环圈 / 固化胶 / 增塑剂

Key words

Optical fiber coil / Curing adhesive / Plasticizer

参考文献

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