Study Of Unsaturated Poly(Ester-(i)amide) Synthesis And Properties Of Their Composites

Diodegradable polymers due to good biodegradable and mechanical properties attenuation which overcome matel devices's shortcoming have been successfully used in clinical settings,but have been limited to low-load beering applications due to insufficient strength.Glass fibers reinforced plastics which have many advantages such as low density and high strength,patience rot and prevent infiltrate,isolation heat and absorb sound have been widely used in architecture domain and auto accessory.However,All of those used plastics could not been degradabled and make the environment worse.In this paper,using maleic anhydride,phthalic anhydride,ethylene glycol, propylene glycol,neopentylene glycol,diethylene glycol,benzyl alcohol,cyclohexanol, glycin,anthranillic acid,caprolactam,hexane diamine,urea as raws,we synthesized a series of novel unsaturated poly(ester-a(i)mide)resin by melt polycondensation and characterized them.Vinyl acetate was used as crosslinker and joined in some initiation-accelerant agent,then crosslinking at room temperature and heat treatment. Mechanical and degradable(hydrolysis)properties of crosslinked unsaturated poly(ester-amide)were stuied after heat treatment.Nano-Hydroxyapatite(n-HA), Calcium polyphosphate fibers(CPPF),Glass-fibers(GF),Glass fibers cloth(GFC),Jute fibers(JF)were used to boost up the novel unsaturated poly(ester-amide).The properties of composites were also carried out.The article attains many significative results through a mass of experiment.All results show that:(1)A series of novel unsaturated poly(ester-a(i)mide)with desired physicochemical properties was successfully prepated by melt polycondensation.All the prepared copolymers possess desired thermal stability and can crooslink easily.(2)After heat treatment with different heat treatment conditions,improving heat treatment time and temperature or raising crosslinker content can dramatically increase the mechanical and degradation(hydrolysis)properties of unsaturated poly(ester-a(i)mide),but,there are maximum values.(3)Using n-HA boost up crosslinked unsaturated poly(ester-amide)have some limited effects,but,the mechanical properties of n-HA/unsaturated poly(ester-amide) nanocomposites containing 10 wt%n-HA has a maximum value.N-HA/unsaturated poly(ester-amide)nanocomposites have a lower mass loss and increased retention of mechanical properties corresponding crosslinked unsaturated poly(ester-amide)in 3 months degradation process.(4)The mechanical strength especially impact strength of CPPF/unsaturated poly (ester-amide)composites is increased very quickly as CPPF content raised.But,after degradation 3 months,a numbers of pores are left on the CPPF/unsaturated poly (ester-amide)composites surface which could accelerate the degradation rate of the composites.(5)Surface treatment to GF(GFC)or using length GF have more effects to increase the GF(GFC)/unsaturated poly(ester-amide)composites,and as the content of about 50 wt%GF(GFC)in the composites,the mechanical properties of the GF(GFC)/unsaturated poly(ester-amide)composites achieved maximum values.(6)Flexural properties and impact strength of JF/ unsaturated poly(ester-amide) composites are increased as JF content and length JF have more effect to boost up the crosslinked unsaturated poly(ester-amide).