Synthesis and characterization of the biodegradable copolymers from succinic acid and adipic acid with 1,4‐butanediol

Abstract

Biodegradable homopolyesters such as poly(butylene succinate) (PBSU) and poly(butylene adipate) (PBAD) and copolyesters such as poly(butylene succinate‐co‐butylene adipate) (PBSA) were synthesized, respectively, from succinic acid (SA) and adipic acid (AA) with 1,4‐butanediol through a two‐step process of esterification and deglycolization. The polyester compositions and physical properties of both homopolyesters and copolyesters were investigated by 1H– and 13C–NMR, DSC, GPC, WAXD, and optical polarizing microscopy. The melting point (Tm) of these copolyesters decreased gradually as the contents of butylene adipate increased and the glass‐transition temperature (Tg) of these copolyesters decreased linearly as the contents of the adipoyl unit increased. PBSA copolyesters showed two types of XRD patterns of PBSU and PBAD homopolyesters. Furthermore, the biodegradation and hydrolytic degradation of the high molecular weight PBSU homopolyester, PBAD homopolyester, and PBSA copolyesters were investigated in the composting soil and NH4Cl aqueous solutions at a pH level of 10.6. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2808–2826, 2001

Novel poly(butylene succinate) nanocomposites containing strontium hydroxyapatite nanorods with enhanced osteoconductivity for tissue engineering applications

“…According to this procedure polyesters with high molecular weight can be prepared and the M n and M w values of neat PBSu are calculated at 40 850 and 92 220 g/mol, respectively, which is quite satisfactory for aliphatic polyesters [11]. The presence of the nanorods in the polymerization mixture, affected the reaction, leading to variations of the final molecular weight of the synthesized polymers.…”

“…The crystalline structure of the nanocomposites was studied using XRD. The crystal unit cell of PBSu is monoclinic and diffraction peaks from [020] and [110] are observed at 2& 19.8 and 22.6° respectively [9,11,20]. Although SrHAp nanorods are crystalline materials none of their peaks can be recognized, even these with high intensity at 20.4, 26.6 and 31°, because they are overlapped by denser PBSu peaks ( Figure 5).…”

Synthesis and characterization of novel poly(butylene succinate-co-2-methyl-1,3-propylene succinate)s

“…To promote the physical properties, extend the application field, and increase the biodegradability of PBSu, numerous approaches have been used, such as physical blending, copolymerization, or formation of composites. With respect to copolymers, the degradation rates of PBSu can be increased by incorporating small amounts of various diols [19][20][21][22][23][24] or diacids [24][25][26][27][28]; this is basically attributed to the reduced crystallinity. Unlike PBSu, poly(propylene succinate) (PPSu) has an odd number of carbon atoms in the backbone.…”

Recent Strategies for the Development of Biosourced-Monomers, Oligomers and Polymers-Based Materials: A Review with an Innovation and a Bigger Data Focus

“…A second way is the direct polycondensation of dicarboxylic acids with diols [135]- [140]. However, as the thermal and mechanical properties of those biosourced polyesters are not always optimal for industrial applications, attempts have been made to improve those properties; for example by the introduction, through copolymerization, of amide groups into the main polyester chains provided that these comonomers promote strong intermolecular hydrogen-bond interactions.…”