Recently, the flame retardancy of the pressure‐sensitive adhesive acquired a large amount of research interest because of their ability to cease the effect of fire on products, which are widely used for high‐temperature applications. The current study comprises the addition of the phosphorus modified mannitol (PMM) in a clear acrylic pressure‐sensitive adhesive (CPSAs). Mannitol indulges the replacement of the petroleum‐based crosslinking agent used for CPSAs, and phosphorus modification imparts the inherent flame retardancy. The process includes two parts, the first part comprises the conversion of D‐mannitol into 2,4:3,5‐di‐O‐methyl‐D‐mannitol followed by the modification through phosphorus oxychloride (POCl₃) and the second part includes the addition of the PMM in CPSAs. The qualitative analysis of the formed compound was done with Fourier transform infrared spectroscopy (FT‐IR), and nuclear magnetic resonance spectroscopy (NMR). To understand the dependency of the PMM dose on adhesive performance, glass transition temperature (T_g) was measured through dynamic mechanical thermal analysis (DMTA). The performance of adhesive was evaluated by determining optical and adhesion properties such as refractive index, impact resistance, peel strength, the probe tack, and the shear adhesion failure temperature. Thermogravimetric analysis (TGA) was used to understand the thermal degradation of the adhesive. Successively, it was observed that the T_g and other properties are the functions of PMM concentration. Adhesive shows the excellent flame retardancy with maximum limiting oxygen index (LOI) value of 48 and a self‐extinguishing behavior, as confirmed by the UL‐94 test. The extinguishing of the fire occurs with the formation of the 0.9 to 6 mm char with a closed cell‐like structure confirmed through SEM.

中文翻译：

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将阻燃剂掺入生物资源的基于甘露醇的固化剂中以形成透明的压敏胶

近来，由于压敏胶粘剂的阻燃性能够停止对产品的着火作用，因此该胶粘剂的阻燃性引起了广泛的研究兴趣，该产品已广泛用于高温应用中。目前的研究包括在透明的丙烯酸压敏胶粘剂（CPSA）中添加磷改性的甘露醇（PMM）。甘露醇可以取代用于CPSA的石油基交联剂，而磷改性则具有固有的阻燃性。该过程包括两个部分，第一部分包括将D-甘露醇转化为2,4：3,5-二-O-甲基-D-甘露醇，然后通过三氯氧化磷（POCl ₃），第二部分包括在CPSA中添加PMM。使用傅立叶变换红外光谱（FT-IR）和核磁共振光谱（NMR）对形成的化合物进行定性分析。为了理解PMM剂量对粘合性能的依赖性，通过动态机械热分析（DMTA）测量了玻璃化转变温度（T _g）。通过确定光学和粘合性能（例如折射率，耐冲击性，剥离强度，探针粘性和剪切粘合破坏温度）来评估粘合剂的性能。使用热重分析（TGA）了解粘合剂的热降解。连续观察到，T _g其他特性是PMM浓度的函数。胶粘剂具有出色的阻燃性，最大极限氧指数（LOI）值为48，并且具有自熄性，这已通过UL-94测试确认。通过SEM确认形成0.9至6 mm的炭并形成闭孔状结构，即可扑灭火焰。