Preparation Of PES-C-g-PA6Graf Copolymer And Its Modification To The PES-c, PES-C/PA6System

Over the past several decades, In-situ polymerization is as an effective method ofthe modified MC nylon, Many people studied the rigid polymer was used to improvethe properties of tensile strength, thermal stability, water absorption of nylon substratemolecule composite. PES-C is a high temperature engineering plastics with benzenering structure as the main chain, which having a higher glass transition temperature,good heat resistance and excellent mechanical properties. furthermore, the main chainof the PES-C have a sulfone group and a strongly polar phenolphthaleinpolar sidegroups, it helps to be dissolved in the ε-caprolactam melt and dispersed well.On this basis, we proposed an idea that the PES-C plays as an macromolecularactivator to initiated the ring-opening polymerization of caprolactam, and synthesizethe PES-C-g-PA6graft copolymer successfully. In this paper, we studied the influenceof the content of the NaOH and PES-C on the structure and performance ofPES-C-g-PA6copolymer.The test results show that with the increase amount ofPES-C or NaOH, the percentage content of PA6in copolymer varied regularly. theintroducation of PES-C into the nylon matrix through in-situ polymerization methoddoes not change the crystalline form of the base body, but has a devastating impact tocrystallization properties, while MCPA6’s glass transition temperature anddecomposition temperature would be increased. The mechanical properties test resultsshow that as long as the synthesis conditions are suitablein, PES-C can also serve toenhance the effect of strength and toughness, this depends on how this rigid chainmolecules disperse in the nylon matrix.According to the principle of "similar compatibility", it can predicte that the graftpolymer has a certain compatibility with the PES-C or PA for it has the PA and PES-Csegment at the same time. so we designed a project to blends the PES-C-g-PA6graftcopolymer with PES-C or PES-C/PA6composite system, and focused on the studyabout modification of processing rheology of PES-C and PES-C/PA6mixturecompatibility. The Hakke data show that, when PES-C-g-PA6situ graft copolymer were added the PES-C matix by only5%content, the melt fluidity of the mixtureimproved effectively, the balance torque decreased from20N·m to15N·m, and withincrease of content, it continues to decline, the lowest only7.9N·m. DSC and DMAdata show that after blending, ΔTg between the components of PES-C and PA6decreased very significantly, up to50℃, this suggested the significantlyimprovement on compatibility; among this blends,10%(1-32) copolymer providedthe most excellent comprehensive performance when add the content of7%.Experiments show that the PES-C/PA6blends is an incompatible system, thein-situ graft copolymer have good compatibilization effect to PES-C/PA6blends,after the addition of10%(1-32) in situ polymer, performance of the ternary blend hasbeen greatly improved, especially in the amount of7%.