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基础和固化系统对全复合热弹性体增材制造的影响

A A Mubasshir¹, Stiven Kodra², Chandramouli Sangeetham²

¹Department of Plastics Engineering, University of Massachusetts, Lowell 01854, MA, USA.

|February 27, 2026

概括

这项研究揭示了不同类型的和固化剂如何影响3D打印. 硫固化 (NBR) 显示出比EPDM更好的层附着性,但比EPDM更大的收缩,而过氧化固化提供更长的打印时间.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
添加剂制造添加剂制造添加剂制造

背景情况:

众所周知,常规制剂的效果是众所周知的,但它们在基于挤出的增材制造中的作用还未得到充分研究.
了解这些变量对于优化3D打印部件至关重要.

研究的目的:

研究基本类型 (NBR,EPDM) 和固化剂 (硫,过氧化物) 对3D打印件的可加工性和性能的影响.
为了比较添加剂制造中NBR的硫和过氧化物固化系统.
基于配方分析3D打印化合物的异构行为.

主要方法:

材料挤出增材制造的化合物与不同的基础和固化剂.
印刷后收缩,层间粘附 (通过拉力测试) 和异型机械性质的表征.
硫和过氧化物固化系统之间的打印时间和性能比较.

主要成果:

与硫固化EPDM相比,硫固化NBR表现出较高的收缩率 (12%) 和优越的层间粘附率 (84-100%的应力保留率),而硫固化EPDM则表现出较高的收缩率 (7%,51-62%的应力保留率).
与硫固化NBR相比,过氧化物固化NBR的收缩率增加 (16%) 和粘附率降低 (26-33%的应力保留).
所有化合物都表现出异构性行为,取决于打印方向;硫固化NBR显示出最小的异构性.
过氧化物固化系统的印刷时间比硫固化系统要长得多.

结论:

基础和固化剂的选择极大地影响3D打印部件的特性,包括收缩,粘附和异质性.
硫固化有利于NBR的层间粘附和降低异构性,而过氧化物固化延长了印刷时间.
配方设计是为特定的增材制造应用和性能要求量身定制化合物的关键.

关键词:

通过3D打印打印3D打印.添加剂制造添加剂制造添加剂制造固化剂是一种固化剂.乙烯二烯单体 (EPDM) 乙烯二烯单体层间的粘附层间的粘附亚甲乙烯 (NBR) (NBR) 是一种.过氧化物治疗疗法收缩时间收缩时间硫治疗治疗治疗治疗硫治疗治疗治疗治疗热弹性弹性体的热弹性体

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