Strong Thermo-tolerant Silicone-Modified Waterborne Polyurethane/Polyimide Pressure-Sensitive Adhesive,Langmuir

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Strong Thermo-tolerant Silicone-Modified Waterborne Polyurethane/Polyimide Pressure-Sensitive Adhesive
Langmuir ( IF 3.7 ) Pub Date : 2023-11-28 , DOI: 10.1021/acs.langmuir.3c01564
Hangzhou Wang _{1,

2} , Xiaobin Li _{1,

2} , Ending Zhang _{1,

2} , Jun Shi _{1,

2,

3,

4} , Xiaoyan Xiong _{1,

2,

5} , Chenguang Kong _{1,

2} , Jianrong Ren _{1,

2} , Cunzhi Li _{1,

2} , Kun Wu _{1,

2,

6}

Affiliation

A waterborne polyurethane pressure-sensitive adhesive (WPUPSA) has the advantages of low pollution and good viscoelasticity. However, its poor thermo-tolerance limits its application in the field of high temperatures. Hence, a novel silicone-modified strong thermo-tolerant waterborne polyurethane/polyimide pressure-sensitive adhesive is developed as a way to remedy this problem. The single-chain structure of waterborne polyurethane (WPU) is transformed into a network structure by introducing the three-position network structure to increase the cohesive energy and heat resistance of the WPUPSA. Meanwhile, the primary chain of waterborne polyurethane (WPU) is modified by the reaction between pyromellitic dianhydride (PMDA) and isophorone diisocyanate (IPDI) to include an imide ring and a benzene ring with more stable structures and heat resistance. Characterization results of the prepared WPUPSA show that the thermo-tolerance index of the WPUPSA increases by 15.2% and the room temperature 180° peel strength and shear resistance of the WPUPSA increase by 80.9 and 231.8%, respectively. Meanwhile, the temperature corresponding to the maximum thermal decomposition rate of the samples is improved. More importantly, at 80 and 100 °C, the 180° peel strength and shear resistance of the modified samples are stronger than those of the unmodified samples. In addition, the energy storage modulus of WPUPSAs is also greater than the loss and increases with the increase of the frequency. Viscoelasticity dominates in the samples. This will provide new insight for the development of WPUPSAs in the field of high-temperature resistance.

中文翻译：

强耐热有机硅改性水性聚氨酯/聚酰亚胺压敏胶

水性聚氨酯压敏胶(WPUPSA)具有低污染、粘弹性好的优点。但其耐热性差限制了其在高温领域的应用。因此，开发了一种新型有机硅改性强耐热水性聚氨酯/聚酰亚胺压敏胶来解决这一问题。通过引入三位网络结构将水性聚氨酯（WPU）的单链结构转变为网络结构，以增加WPUPSA的内聚能和耐热性。同时，通过均苯四甲酸二酐（PMDA）与异佛尔酮二异氰酸酯（IPDI）的反应对水性聚氨酯（WPU）的主链进行改性，使其包含酰亚胺环和苯环，结构更加稳定，耐热性更好。对所制备的WPPUPSA的表征结果表明，WPPUPSA的耐热指数提高了15.2%，室温180°剥离强度和剪切强度分别提高了80.9%和231.8%。同时提高了样品最大热分解速率对应的温度。更重要的是，在80和100℃下，改性样品的180°剥离强度和抗剪切能力均强于未改性样品。此外，WPUPSA的储能模量也大于损耗，并且随着频率的增加而增加。粘弹性在样品中占主导地位。这将为WPPUPSA在耐高温领域的发展提供新的见解。

更新日期：2023-11-28

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