合成纤维检测

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参考标准:

碳纤维增强聚合物中脱模剂检测方案(红外光谱仪)

Release agents are applied as a liquid that forms a thin film coating to aid removal of carbon-fiber-reinforced polymer (CFRP) parts from a mold or peel ply. This process, however, leads to inevitable contact transfer, causing release agent to remain on the part or repair. Before painting or bonding of the CFRP component to other structures, proper post-treatment to remove vaporizable components of the release agent is required. Improper or inadequate post-treatment leads directly to reduction of bond strength of joined parts or topcoat paint adhesion. The complexity of CFRP systems requires the use of new nondestructive analysis technologies such as FTIR spectroscopy, for the analysis of the surface matrix of the material. The primary objective of this application note is to demonstrate that FTIR spectroscopy can nondestructively measure the level of release agent on a carbon fiber epoxy system before bonding. The analysis uses an Agilent 4100 ExoScan FTIR. This handheld spectrometer enables in-situ inspection during manufacturing, in-service, or repair environments, or ex-situ in a laboratory. The analysis is accomplished in less than 1 minute and does not require any sample pretreatment. This work was part of a joint project commissioned by the European Union entitled ENCOMB (extended nondestructive testing of composite bonds) [1].
检测样品: 合成纤维
检测项: 脱模剂

安捷伦科技(中国)有限公司

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纤维中流变性能研究检测方案(流变仪)

In this work the unsteady-state contact angle at the interface between polymer melt and carbon black (CB) was measured. The transition of contact angle from an unsteady to a steady state can be divided into three stages, the unsteady thermo-stage, the wetting stage, and the reach of equilibrium contact angle. Subsequently, three critical indices, the unsteady heat-transfer period t0, the retardation time τ, and the contact angle at equilibrium state A∞ are defined herein. The decrease in contact angle against time can be simulated by an exponential decay that involves these three critical indices. Molten polypropylene (PP) and polystyrene (PS) have the smallest equilibrium angle A∞, followed by polybutylene terephthalate (PBT), and polymethyl methacrylate (PMMA) has the greatest angle. Interestingly, this order is strongly related to the solubility parameter of each polymer. The CB coated with sulfonated polyester slightly changes the equilibrium angle A∞, but drastically reduces the retardation time τ for PP and PBT. This finding indicates that the CB, whose surface is modified by sulfonated polyester, can effectively reduce the compounding time of PP and polyester. Experimental results also reveal that reduce compact density slightly increases A∞ but barely affects τ. Furthermore, modifying PS with polybutadiene particles yields a high contact angle A∞ and a low τ value.
检测样品: 合成纤维
检测项: 流变性能研究

仪尊科技有限公司

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仪器信息网行业应用栏目为您提供28篇合成纤维检测方案,可分别用于含量分析检测、力学性能检测,参考标准主要有等