The work disscussed the effect of structure of spherulite on properties of pure nylon 6 and Nylon 6/TPAE/Compatibilizer alloy by the experiment of changing the cooling velocity when shaping.First

melts of pure nylon 6 and Nylon 6/TPAE/Compatibilizer alloy were cooled rapidly and slowly on the condition of 4℃ water and 23℃ air respectively.Second

they were made into specimens.Then

specimens were carried on observation of structure of spherulite and dispersioin morphology and analyses of absorbing heat

meanwhile by PLM

SEM and DSC

carried on the experiment of tensile fracture and interface tearing. The results show;(1) Dispersion particles are well-distributed between interface and interior of spherulite or between lameller crystals.(2)The size of spherulit is greatly is greatly different when pure nylong 6 is cooled rapidly in 4℃ water.But that of spherulite is well-distributed when it is cooled slowly in 23℃ air.The comparison of them shows the latter speciment's size of spherulite is large and fracture strength is high

with decreasing deformation and energy of tensile fracture.(3) The size of spherulite is small but differs greatly when Nylon6/TPAE/A8200 alloy was cooled rapidly in 4℃ water

but that of spherulite is large and well-distributed in 23℃ air.The comparison of them shows the latter specimen's size of spherulite is large and fracture strength is high

with increasing the deformation and energy and energy of tensile fracture.(4) On the same cooling condition

the change trend of size of soherulite of pure nylon 6 and nylon 6/TPAE/Compatibilizer alloy is same

but that of properties of tensile freacture is oppsite.This a because slow cooling contributes to not only the formation of large spherulite but also the enhancement of adhesion strength of interface between the dispersed phase TPAE and successive phase nylon 6.On the other hand

the dispersion of tiny TPAE particle in the interface and interior of nylon 6 spherulite strengthens the deformation ability of spherulite

and enhances the strength deformation and energy of tenssile fracture. Pure nylon 6 has not these specific properties.Therefore

though the size of spherulite is one of factors which influence fracture properties of nylon6

the interface of spherulite

non-crystal stucture between lamellar crysrals

voiding of tiny elastic and adhesion strength of phase interface are main factors which influence fracture properties of nylon 6.