摘要
共价交联材料因其性能卓越而被广泛应用,在轮胎、密封件和医疗植入物等领域发挥着不可或缺的作用。将动态共价键引入聚合物的交联网络中,可制备具有良好机械性能的材料。本研究提出了一种简单的方法,通过将动态硼酸酯键引入到热塑性高分子网络中制备拥有永久交联的弹性体纤维。通过熔融纺丝的方法制备苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)和含有动态硼酸酯键的SBS纤维,再通过热处理得到含有共价交联的cured-BS5纤维。因制备的cured-BS5纤维中含有共价交联网络,使其具有较高的机械强度和耐溶剂性。且由于硼酸酯键的酯交换作用,可以改变网络拓扑结构,从而使cured-BS5纤维仍具有很好的弹性。
Covalent crosslinked materials are widely used for their excellent properties and play an indispensable role in fields such as tires,seals and medical implants.By introducing dynamic covalent bonds into the cross-linked network of polymers,materials with good mechanical properties can be prepared.In this work,a simple method is proposed to prepare elastomer fibers with permanent crosslinks by introducing dynamic borate ester bonds into thermoplastic polymer networks.The styrene-butadiene-styrene block copolymer(SBS)and SBS fiber containing dynamic borate ester bond are prepared by melt spinning method.The cured BS5 fiber containing covalent cross-linking is obtained by heat treatment.The prepared cured-BS5 fiber contains covalent cross-linked networks which gives it high mechanical strength and solvent resistance.The fiber can change the network topology due to the transesterification of the borate ester bond.cured-BS5 fiber is still very flexible.
作者
尹培阳
刘泽新
杨曙光
YIN Peiyang;LIU Zexin;YANG Shuguang(State Key Laboratory of Advanced Fiber Materials,Center for Advanced Low-dimension Materials,College of Material Science and Engineering,Donghua University,Shanghai 201620,China)
出处
《山东化工》
2025年第21期46-50,共5页
Shandong Chemical Industry
关键词
动态共价键
纤维
硼酸酯键
机械性能
dynamic covalent bond
fiber
borate ester bond
mechanical property
