Design and Synthesis of Shape Memory Phenol-Formaldehyde with Good Irradiation Resistance, Thermal, and Mechanical Properties,ACS Applied Polymer Materials

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Design and Synthesis of Shape Memory Phenol-Formaldehyde with Good Irradiation Resistance, Thermal, and Mechanical Properties
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2022-07-27 , DOI: 10.1021/acsapm.2c00719
Yongdie Deng ₁ , Fenghua Zhang ₁ , Yanju Liu ₂ , Jinsong Leng ₁

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Phenol-formaldehyde (PF) resins with low flammability and excellent ablative property have been widely used in thermal protection systems in the aerospace field. The developing deployable thermal protection structure has prompted further exploration of the possibility of PF resin as a smart polymer. This paper prepares the shape memory phenol-formaldehyde resins (SMPFs) by introducing polyurethane (PU) prepolymer into the resol resin. The SMPFs with crystallization microregion possess excellent shape memory performance and better toughness than PF resin. In addition, the SMPFs have a higher carbon residue rate and better thermal stability compared with other shape memory polymers commonly used in the aerospace field. Multiple test results before and after γ-ray irradiation indicate that SMPFs have excellent irradiation resistance. The oxyacetylene ablative test demonstrates that SMPFs have relatively good ablative resistance. SMPFs inspire the production of intelligent thermal protection systems.

中文翻译：

具有良好抗辐照性、热学和力学性能的形状记忆酚醛树脂的设计与合成

酚醛（PF）树脂具有低可燃性和优异的烧蚀性能，已广泛应用于航空航天领域的热防护系统。开发中的可展开热保护结构促使进一步探索PF树脂作为智能聚合物的可能性。本文通过将聚氨酯（PU）预聚物引入甲阶酚醛树脂中制备形状记忆酚醛树脂（SMPFs）。具有结晶微区的SMPF具有比PF树脂优异的形状记忆性能和更好的韧性。此外，与航空航天领域常用的其他形状记忆聚合物相比，SMPFs具有更高的残碳率和更好的热稳定性。γ射线辐照前后的多次测试结果表明，SMPFs具有优异的抗辐照性。氧乙炔烧蚀试验表明 SMPF 具有较好的抗烧蚀性能。SMPF 激发了智能热保护系统的生产。

更新日期：2022-07-27

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