Preparation,Properties and Non-Isothermal Crystallization Kinetics of Biobased Long Chain Polyamide 1210 Elastomers
Biobased long chain thermoplastic polyamide elastomers(TPAEs)have garnered extensive attention from both academia and industry in recent years.In this paper,polyetheramine(PEA)and biobased long chain polyamide 1210(LCPA 1210)were used to prepare PEA-type biobased LCPA 1210 elastomer(TPAE 1210).The prepared TPAE 1210 exhibits high molecular weight and narrow distribution,with mechanical properties comparable to commercial products.It primarily forms an α-crystalline structure,and the regularity of polyamide chain structure within certain crystalline regions is significantly influenced by PEA,resulting in secondary crystallization behavior during heating.Non-isothermal crystallization kinetics of TPAE 1210 were investigated by differential scanning calorimetry.The results indicate that TPAE 1210 primarily undergoes one-dimensional growth through heterogeneous nucleation during the primary crystallization and transitions to two-dimensional growth in the secondary crystallization.The crystallization activation energy of TPAE 1210,calculated by Kissinger method,is determined to be-144.4 kJ/mol.
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