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Standard Test Method for Characterizing Tack of Prepregs Using a Continuous Application-and-Peel Procedure 用连续应用和剥离程序表征预浸料粘结特性的标准试验方法
发布日期: 2024-02-15
1.1 该试验方法包括在规定条件下,在剥离试验中测量部分固化(B阶段)的复合材料预浸料与表面之间的附着力(粘性)。可以进行该测试以测量预浸料的柔性层和结合到刚性基底(方法I)或刚性金属基底(方法II)的另一预浸料层之间的粘性。该测试方法主要用于自动材料叠层的材料表征,但也可进行修改以用于其他工艺。众所周知,材料粘性是多种加工和环境变量的函数。允许的复合预浸材料包括B阶段热固性树脂中的碳、玻璃和芳纶纤维。 1.2 测得的粘性是根据给定试样宽度下的剥离力来规定的。 1.3 单位-- 以国际单位制表示的数值应视为标准。SI单位后括号中给出的值仅供参考,不被视为标准值。 每个系统中规定的值不一定是完全相等的;因此,为了确保符合标准,每个系统应独立使用,并且不得将两个系统的值组合使用。 1.4 本标准并不旨在解决与其使用相关的所有安全问题(如有)。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践,并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 表征不同预浸材料的粘性、测试参数、表面组合和环境条件,为优化工业自动化材料放置过程的工艺参数(特别是沉积速率和沉积温度)提供了见解。 5.2 如研究中所述,通过连续应用和剥离方法获得的结果( 1. 3. ), 3. 反映了预浸料层之间或预浸料与金属基材之间形成的粘附力的影响,以及预浸料中树脂内的内聚力的损失。该测试方法允许以与动态材料沉积过程相关的方式探索B阶段树脂的粘合性能,其中预浸料与基材或先前放置的预浸料层的粘合时间在固化前很短。相反,测试方法 D3167 和 D1781 测定用于层压或粘合被粘物的粘附性测量和过程控制的粘合剂结合的抗剥离性。 5.3 该测试方法适用于量化预浸料坯的粘性以进行验收和工艺控制,并可扩展以确定树脂的保质期或根据树脂的失效时间调整工艺参数。只有当样品制备和测试条件相同时,才能对不同的树脂/预浸料或工艺进行直接比较。
1.1 This test method covers measurement of adhesion (tack) between partially cured (B-staged) composite prepreg and a surface in a peel test, under specified conditions. The test may be conducted to measure tack between a flexible layer of prepreg and another prepreg layer bonded to a rigid substrate (Method I) or a rigid metal substrate (Method II). This test method is primarily geared towards material characterization for automated material layup but can be modified for use with other processes. It is well known that material tack is a function of multiple processing and environmental variables. Permissible composite prepreg materials include carbon, glass, and aramid fibers within a B-staged thermoset resin. 1.2 Measured tack is specified in terms of a peel force at a given specimen width. 1.3 Units— The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Characterizing tack for different prepreg materials, test parameters, surface combinations, and environmental conditions provides insight for optimizing process parameters (particularly deposition rate and deposition temperature) for industrial automated material placement processes. 5.2 Results obtained through employing the continuous application-and-peel method, as described in studies ( 1- 3 ), 3 reflect the effects of adhesion forming between prepreg layers or between prepreg and metal substrate, and loss of cohesion within the resin in the prepreg, upon tack. This test method allows the adhesive properties of B-staged resin to be explored in a manner relevant for dynamic material deposition processes, where timescales for bonding of prepreg to the substrate or previously placed prepreg layers are short prior to curing. In contrast, Test Methods D3167 and D1781 determine the peel resistance of adhesive bonds for adhesion measurement and process control of laminated or bonded adherends. 5.3 The test method is suitable to quantify tack of prepregs for acceptance and process control and can be extended to determine resin shelf life or to adjust process parameters to resin out-time. Direct comparison of different resins/prepregs or processes can only be made when specimen preparation and test conditions are identical.
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归口单位: D30.03
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