Poly(ethylene succinate)-b-poly(butylene succinate) Multiblock Copolyesters: The Effects of Block Length and Composition on Physical Properties

Abstract

Poly(ethylene succinate)-b-poly(butylene succinate) (PES-b-PBS) multiblock copolymers with different block lengths and compositions were synthesized, and their chemical structure, molecular weights, and polydispersity index of the copolymers were characterized by 1 H NMR and GPC, respectively. The miscibility and crystallization of PES and PBS blocks in the copolymers were investigated by DSC. The results suggested that PES and PBS blocks are miscible in copolymers with shorter block lengths, while they are partially miscible in those with longer block lengths. The crystallization of PBS blocks were depressed with an increase in PES content due to the diluent effect, and that of PES blocks was largely restricted when its content was less than the PBS block, while that was improved when its content was more than that of the PBS block due to the nucleation effect of previously crystallized PBS. The results of tensile test suggest that all the copolymers showed excellent mechanical property.

High strength, epoxy cross-linked high sulfur content polymers from one-step reactive compatibilization inverse vulcanization

“…Many SMPs are made of phasesegregated multi-block copolymer structures consisting of hard segments as physical cross-links and so segments as thermoresponsive domains for shape-memory actuation. [37][38][39] The S-AGE described herein is prepared from a one-step, solvent-free bulk polymerization, which, together with its unprecedentedly high strength, excellent performance as a SMP, reprogrammability, and reprocessability, render the new material worthy of further investigations and applications.…”

Preparation of waterborne elastic polyesters by chain extension with isophorone diisocyanate as a chain extender

“…Both the glass transition temperatures of these two microdomains increased with the increase of hard polyester weight ratio. Xu et al . found that a block copolymer prepared by a chain‐extension with short length of poly(butylene succinate) (PBS) ( M n = 2060 g mol −1 ) and poly(ethylene succinate) (PES) ( M n = 2370 g mol −1 ) in any proportion had only one glass transition temperature peak, because PBS and PES had good compatibility.…”

Polypropylene Glycol-Polyoxytetramethylene Glycol Multiblock Copolymers with High Molecular Weight: Synthesis, Characterization, and Silanization

“…Interestingly, the DSC curve of copolymer-III with the highest M n showed no crystallization peak in its cooling process, but presented a cold crystallization peak concentrated at −20.9 °C in its heating process. The cold crystallization peak is commonly seen in polymers with a low crystallization rate [24], indicating that copolymer-III had the weakest crystallization capability. The broad and small fusion peaks in the heating DSC curves of the block copolymers (Figure 6b) imply that an imperfect crystal structure exists in copolymers, and the imperfect extent increases with M n , as shown by the order of melting temperature ( T m ) of copolymers (Table 1).…”