Preparation and Properties of Water-Soluble Core-Materials Applied for RTM
|School||National University of Defense Science and Technology|
|Course||Materials Science and Engineering|
|Keywords||RTM Mandrel Polyvinylpyrrolidone (PVP) Quartz sand Mechanical properties Water solubility Composite materials|
Some composite structural member having a complicated internal structure , the whole forming a difficult problem because the demolding difficult by a conventional RTM process . Has certain mechanical properties and the water - soluble , water-soluble mandrel material to become a possible way to solve the above problems . In this paper, water-soluble mandrel material for the study , polyvinylpyrrolidone ( PVP ) and commodity MERKA2405 as an adhesive , quartz sand as a filler to prepare water-soluble mandrel materials . The main content includes: ( 1 ) Research PVP solution and the two adhesives MERKA2405 basic performance by infrared spectroscopy , including the apparent viscosity and the period of application of the adhesive , and two adhesive functional group . ( 2) Method for preparing water - soluble mandrel material , the process parameters for the preparation of water - soluble mandrel material were analyzed . The heating temperature , mortar quality ratio , particle size of the quartz sand and quartz sand pretreatment process parameters on the mechanical properties of water - soluble mandrel material . The results show that the PVP and MERKA2405 two kinds of adhesives obtained at about 130 ° C and 140 ° C respectively the mechanical properties of the water - soluble mandrel material best ; mortar mass ratio of 1.6:10 two water-soluble mandrel material bending the best strength and compressive strength ; quartz sand, the smaller the particle size , the better the mechanical properties ; mandrel mechanical properties of materials made ??by the the KH550 pretreatment quartz sand is slightly better than the core made of untreated quartz sand mold material . ( 3 ) To investigate the mechanism of PVP aqueous water - soluble mandrel , water - soluble mandrel materials water-soluble characterization methods and design of water-soluble experimental device . The impact of the the mortar mass ratio , quartz sand particle size , water temperature and water pH and other process parameters and dissolved environment on the solubility of the water-soluble mandrel materials . The results show that the quality of the mortar than the smaller , the greater the particle size of the quartz sand , the better the higher the temperature the water - soluble mandrel materials water-soluble , acidic or alkaline water environment role in promoting the dissolution of the water-soluble mandrel materials . (4) Design a certain specific structural features scaled , the use of water-soluble mandrel material formulations for preparing water - soluble mandrel screened in this article , preparation of composite products using the RTM process to study water-soluble mandrel applicability and its impact on the performance of composite material products .