SYNTHESIS OF N,N'-BIS(BENZOYL) DODECANEDIOIC ACID DIHYDRAZIDE AND EFFECT ON NUCLEATION AND MECHANICAL PROPERTIES OF POLY(L-LACTIC ACID)

N,N'-Bis(benzoyl) dodecanedioic acid dihydrazide (NA) was synthesized by a advanced routes, and the structure of NA had been confirmed by FT-IR, 1H NMR. The influence of the NA to nucleation and mechanical properties of Poly(L-lactic acid)(PLLA) were investigated. Compared to the neat PLLA, with the addition of 0.8% NA, the crystallization temperature (To) increase from 105.88 °C to 125.07 °C and the crystallization enthalpy (ΔHc) increase from 1.379 J•g-1 to 29.17 J•g-1 at a cooling rate of 1 °C/min from melt. The low content of NA can increase the mechanical properties of PLLA. Upon addition of 0.5%NA, comparing with the neat PLLA, the tensile strength modulus and elongations at break increase from 74.4 MPa, 3592.8 MPa and 2.72% to 85.3 Mpa, 4266.2 Mpa and 2.98%, respectively. And the impact strength possesses a maximum value for the critical NA loading 1%.

• Cai
• Filimonov D.A.
• Zhang Yan-Hua

• Прикладные науки. Медицина. Технология

• Социальные (общественные) науки
• Естественные науки