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Phenolic Laminated Sheet Tube

Jul 28, 2017

                Phenolic laminates have high mechanical strength and good oil resistance and are commonly used as mechanical insulating parts. The biggest drawback of phenolic resin as binder is that it is brittle after curing, which leads to poor impact resistance of phenolic laminates. The reinforcement and toughening modification of phenolic laminates is helpful to improve its performance and expand its application range. In this paper, the use of Tung Oil and PBT (poly-butyl terephthalate), respectively as internal toughening and external toughening of the two methods of modification, the phenolic laminate laminates to enhance toughening modification, the effects of different modifiers on the thermal stability of phenolic resin were investigated, and the application of the needle-like wollastonite powder to the preparation of high-strength phenolic laminates was made by using the enhanced toughening technique of inorganic rigid particles, and a preliminary discussion was made on the composite modification of pbt/needle-like wollastonite powder.Laminated Tube

               The test results showed that the quality fraction of phenolic resin modified with tung oil was increased, the transverse impact strength of phenolic laminates is gradually increased to the 2kj/m2.4kj/m2, longitudinal impact strength from the 3kj/m2 gradually increased to the 8kj/m2, the bending strength gradually decreased, and the pure phenolic resin modified by Tung oil was reduced in the thermal stability of the more than 350 ℃. The blending quality fraction of PBT was increased from 0wt% to 15wt%, and the transverse longitudinal bending strength of phenolic laminates increased first and then stabilized, the impact strength decreases slightly after slight lifting; SEM sectional scanning results show that the cross section formation can distinguish the continuous phase and the dispersed phase when the PBT blending quality fraction is lower. The PBT blending modified phenolic resin is less than 375 ℃ high temperature zone.Laminated Tube

                With the increase of the filling mass fraction of the needle-like wollastonite powder, the transverse longitudinal impact strength gradient of the phenolic laminates was increased, and the flexural strength was increased first and then decreased. The diameter of needle-like wollastonite powder is from 6.5μm to 23μm, the transverse longitudinal impact strength of phenolic laminates increases and the flexural strength is unchanged; After coupling activation modification, the transverse impact strength of the phenolic laminates is from the surface. 6kj/m2 raised to the 3kj/m2, longitudinal impact strength from the 1kj/ The M2 is raised to the 8kj/m2, the flexural strength is unchanged; SEM section scanning results show that the surface treatment of the needle-like wollastonite powder in the composite system dispersed more evenly, the reunion decreased. The composite modification performance of pbt/needle-like wollastonite powder enhances the toughening effect on the basis of PBT single modification. Phenolic laminated cloth plate transverse impact strength from the 3kj/m2 to the 31kj/m2, the longitudinal impact strength is increased from the 5kj/m2 to the 6kj/m2, the transverse bending strength from $number. 8MPa to $number. 6MPa, longitudinal bending strength from $number. 8MPa to 136MPa.Laminated Tube