PEBA based on aromatic PA segments of uniform length

PEBA based on aromatic PA segments of uniform length 

Following the rubbery plateau, a decrease in the storage modulus above 175°C occurred due to the softening of the sample, induced by the melting of the Td T crystalline phase. DSC analysis of these PEBA copolymers revealed an endothermic peak above 200 °C in samples with a T T content greater than 20 wt%, attributable to the melting of the T i)T crystalline phase. Moreover, 

The stress relaxation (SR) of the PTMO-T T based PEBA copolymers, stretched to a strain of 100% within 5 s was found to increase with increasing T T content. SR in this particular study was defined as 

P2533 material underwent strain-induced crystallization above 500% strain and the of the resultant PE crystalline phase was also ca. 45 °C. 

The structure-property behavior and the uniaxial deformation behavior of poly (ether-6-amide) copolymers have been reviewed in this chapter. Copolymers based on either aliphatic or aromatic (of uniform length) hard segments and PTMO or PEO as the soft segments were partially explored. These PEBA copolymers possess a complex morphology consisting of microphase-separated hard and soft phases. The extent of microphase separation in these materials is a function of the relative composition of the hard and soft phases and is also dependent on the segment molecular weight. 

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