Chain length effects of aliphatic monoamine on shape memory behaviors of copolybenzoxazines

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-05-20 DOI:10.1016/j.materresbull.2025.113556

Attachai Sriwattana , Manunya Okhawilai , Panuwat Luengrojanakul , Krittapas Charoensuk , Ibrahim Lawan , Panagiotis Karagiannidis , Cheol-Hee Ahn , Sarawut Rimdusit

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Abstract

The objective of this research is to investigate the effect of aliphatic amine chain lengths on shape memory polymers (SMPs) properties of benzoxazine resin. Bisphenol-A, paraformaldehyde, and different aliphatic amine chain lengths at 1:4:2 mol ratio are reacted at 120 °C for an hour. The synthesized samples are represented as BA-xMA, where x is the number of C atoms ranging from 6–18. It was found that shape fixity ratio (Rf) increased with short aliphatic chain, conversely to recovery ratio (Rr). Therefore, the self-copolymerization of poly(BA-xMA/BA-a)s are developed to improve the fixation ability. Interestingly, the cyclability of the copoly(BA-12dda/BA-a) at 60/40 is significantly enhanced reaching 34 cyclability where the Rr remains almost 100 %. Furthermore, the copoly(BA-12dda/BA-a) exhibits multiple-shape memory behavior resulting from a wide range of transition temperatures. The selfcopolymerization of benzoxazine reduces molecular complexity, enhances compatibility, and simplifies preparation steps, making benzoxazine-based SMPs highly promising for advanced shape memory polymer applications.

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脂肪族单胺链长对共苯并恶嗪形状记忆行为的影响

研究了脂肪胺链长对苯并恶嗪树脂形状记忆聚合物（SMPs）性能的影响。双酚a、多聚甲醛和不同脂肪胺链长按1:4:2摩尔比在120℃下反应1小时。合成的样品用BA-xMA表示，其中x为C原子数，范围为6-18。结果表明，脂肪链越短，固形比（Rf）越高，恢复比（Rr）越大。因此，研究了聚（BA-xMA/BA-a）s的自共聚，以提高固定能力。有趣的是，在60/40时，共聚物（BA-12dda/BA-a）的循环性显著增强，达到34循环性，而Rr几乎保持100%。此外，共聚物（BA-12dda/BA-a）表现出多形状记忆行为，这是由广泛的转变温度引起的。苯并恶嗪的自共聚降低了分子的复杂性，增强了相容性，简化了制备步骤，使得基于苯并恶嗪的smp在高级形状记忆聚合物的应用中非常有前途。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.