Enhancing the Crystallization Performance of Poly(L-lactide) by Intramolecular Hybridizing with Tunable Self-assembly-type Oxalamide Segments

Polymer Crystallization on One-Dimensional Templates: From a Hybrid Shish-Kebab-like Structure to Material Properties

“…Self-assembling NAs have also been used to accelerate the crystallization kinetics and tune the crystalline morphology of PLLA and PLLA/PDLA blends. Until now, several kinds of self-assembling NAs have been reported to accelerate the crystallization of PLLA and PLLA/PDLA blends, which includes amide compounds (e.g., EBH, TMC-328, , BTCA, OXA1, and OXA2), hydrazide compounds (e.g., TMC-300, TMC-306, OMBH, and TMBH), and organic salt compounds (e.g., TMC-210). As a typical example, the crystal morphology of PLLA/TMC-328 blends with different contents of TMC-328 was investigated by Fu et al, which sequentially shows macroscopic cone-like, needle-like structures, and finally a typical SK-like superstructure with the increase of NAs content.…”

Dependence of Crystallization Behavior of Interacting Telechelic Poly(butylene succinate) Oligomer on Molecular Weight

“…The achievement of an interacting telechelic polymer is commonly realized by linking specific chemical groups that can form various hydrogen bonds with each other to the chain ends, such as quadruple hydrogen bonds of 2-ureido-4[1H]-pyrimidinone (UPy) [16][17][18][19], multiple hydrogen bonds of thymine (THy) [20,21] and double hydrogen bonds of bis-(monomethyl malonyl) dihydrazide (BMMH) [22]. By bonding BMMH units to polylactide (PLA) chain ends with a number-average molecular weight of about ~1.1 × 10 4 g/mol, the crystallization ability was improved and the nucleation density was notably raised in [22]. However, when introducing UPy units to the chain ends of poly(ε-caprolactone) (PCL) with molecular weight ranging from 1.3 × 10 3 to 7.6 × 10 3 g/mol, the crystallization ability of PCL was weakened [17].…”

Tailoring the crystallization of poly(l-lactide) via structural optimization of hydrogen-bonding segments with different aliphatic spacer lengths

“…OXA-n (N 1 ,N 2 -bis(2-hydroxyethyl)oxalamide (OXA-2), N 1 ,N 2 -bis (4-hydroxybutyl)oxalamide (OXA-4) and N 1 ,N 2 -bis(6-hydroxyhexyl)oxalamide (OXA-6)) were synthesized according to the previously reported method. 29,30 The schematic reaction is shown in Fig. 1(a).…”