Studies On The Preparation And Damping Properties Of Hollow Fiber Damping Materials Inner Core Enhanced By Glass Fiber

It would be a new expansion of the hollow fiber research areas that the hollowfiber have been introduced into the design of damping material and the dampingmaterial have been attached to the hollow woven rope by spinning forming in this paper.This research may laid the foundation of theoretical and experimental research ondeveloping new type high-rise building partition wall materials and aerospace dampingcomposite with high damping and light quality for reduction of their vibration and noisein order to meet the increasing development demand of structure damping compositewith high damping, lightweight and function integration and the demand for newdamping material of Jiangxi aviation industry, construction industry and automotiveindustry.Nitrile-butadiene rubber（NBR） and acrylic rubber（ACM） had been choose asspinning damping material, the problem of making the rubber hollow fiber membraneshad been solved by use glass fiber woven tube as inner core enhanced materials, whichare that the spinning process of rubber hollow fiber membrane is too complicated,rubber hollow fiber is difficult to mold hollow and easy to fall flat shrinkage. Theinfluence of inner core enhanced material and damping raw material on the dampingproperties of hollow fiber membranes, the damping performance and the influence ofthe inner core enhanced hollow fiber, the morphology and damping properties of thedouble-layer composite hollow fiber membranes, the damping property influenced byloading AO-60and nano-TiO₂had been researched in this paper. The results showedthat:（1）Through experimental study, the good performance inner core enhanced hollowfiber damping material had been made successfully, the damping peak, peak width,corresponding formulation and process parameters has been show as follows: thestirring temperature is60℃, the spinning temperature is40℃, the extrusion speed is30ml/min, the wire winding speed is25ml/min, the solid content of casting solution is15%, ACM/PVC blend ratio is70/30, which is the excellent inner core enhancedacrylate rubber hollow fiber, the damping peak reaches0.43, the peak wide of dampingfactor greater than0.2is about60℃.（2）By use the material of glass fiber woven tube as inner core enhanced material,the damping factor decreased slightly, but the storage modulus enhanced significantly, and the effective damping temperature range could also been broadened. The outer andinner layers of the composite hollow fiber membrane bonding good, it’s tanδ-T curveappears doublets obviously that the effective damping temperature range of the hollowfiber had been broadened effectively.（3）Testing methods have certain impact on the study of the hollow fiber dampingmaterials. There are some differences on the hollow fiber damping properties underdifferent test fixture. By comprehensive analysis of DMA Q800different test mode, itresults showed that the single/double cantilever mode is more conducive to the overalldamping properties and the analysis of damping mechanism of the inner core enhancedhollow fiber damping material.（4）By comparative analysis the damping properties of ACM and NBR rubber innercore enhanced hollow fiber membrane, it showed that damping raw materials play aleading role in damping properties. So choose the better the raw material is moreconducive to improve the damping properties of inner core enhanced hollow fibermembrane.（5）The test results also showed that polymer concentration and blend ratio affectthe damping properties of materials. Summarized the laws as follows: the materialdamping peak increased with the poly concentration and the blend ratio of ACM/PVCor NBR/PVC; the glass transition temperature （Tg） of material move to the lowertemperature with the increases of rubber in the polymer blend ratio.（6）In the test range, its damping properties could been improved by adding AO-60,but the added amount has little effect on the damping properties of inner core enhancedhollow fiber. With the addition of nano-TiO₂, the damping peak of materials decreasedslightly, but the Tg unchanged obviously.