Processing and properties of co-injected Resin Transfer molded vinyl ester and phenolic composites
Processing and properties of co-injected Resin Transfer molded vinyl ester and phenolic composites
复制标题
共注射树脂传递模塑乙烯基酯和酚醛复合材料的加工和性能
DOI：
10.1002/pc.10401
复制
发表时间：
1999
影响因子：
5.2
通讯作者：
B. K. Fink
中科院分区：
文献类型：
--
作者：
Emanuele F. Gillio;G. Mcknight;J. Gillespie;S. Advani;K. Bernetich;B. K. Fink
真空辅助树脂传递模塑型工艺已被证明是大型复合材料结构的成本有效的制造技术。然而，它们的使用仅限于单一树脂体系。各种各样的复合材料结构需要多种树脂来服务于不同的目的，同时被集成到单个结构中。共注树脂传递模塑（CIRTM）是一种新的制造工艺，由特拉华州大学复合材料中心与美国陆军研究实验室合作开发，使用户能够在单个加工步骤中制造多层混合复合材料部件（1）。本文使用CIRTM制造双层结构，该结构由用于结构完整性的乙烯基酯层和用于防火、防烟和防毒性的酚醛层组成。这两种树脂同时注入到填充有固定纤维床的模具中并共固化。通过将0.0254 mm（0.001 in）厚的聚砜膜夹在两层0.165 mm（0.0065 in）厚的粘合剂之间来保持树脂分离。使用差示扫描量热仪（DSC）为所有材料选择最佳固化周期。力学测试用于评估不同材料之间形成的界面的性能。短梁剪切（SBS）用于评估所生产零件的整体质量。采用双悬臂梁（DCB）法对界面相的断裂韧性进行了定量分析，并采用楔形试验对界面相的耐久性进行了评价。实验结果表明，共注射的共固化材料提供的性能等同于，或在某些情况下，上级，由单注射树脂复合材料提供的那些。该案例用于开发和提出一种可用于共注射不同树脂的方法。
Vacuum Assisted Resin Transfer Molding type processes have been proven to be cost effective manufacturing techniques for large composite structures. However, their use has been limited to a single resin system. A large variety of composite structures require multiple resins to serve different purposes while being integrated into a single structure. Co-Injection Resin Transfer Molding (CIRTM) is a new manufacturing process, developed at the University of Delaware's Center for Composite Materials in collaboration with the U.S. Army Research Laboratory, that enables the user to manufacture multi-layer hybrid composite parts in a single processing step (1). In this paper, CIRTM is used to manufacture a dual layered structure consisting of a vinyl ester layer for structural integrity and a phenolic layer for fire, smoke, and toxicity protection. The two resins are simultaneously injected into a mold filled with a stationary fiber bed and are co-cured. Resin separation is maintained by a 0.0254 mm (0.001 in) thick polysulfone film sandwiched between two layers of 0.165 mm (0.0065 in) thick adhesive. A Differential Scanning Calorimeter (DSC) is used to select the optimum cure cycle for all of the materials. Mechanical testing is used to evaluate the performance of the interphase formed between dissimilar materials. Short beam shear (SBS) is used to evaluate the overall quality of the part produced. Double cantilever beam (DCB) is used to quantify the fracture toughness of the interphase, and the wedge test is used to evaluate the durability of the interphase. Experimental results show that co-injected, co-cured materials offer properties equivalent, or in some cases, superior, to those provided by single injection resin composites. This case is used to develop and present a methodology that can be followed to co-inject different resins.