High-T_g PLA copolymers via base-catalyzed transesterification of PLA with 2,5,7-trioxabicyclo[2.2.2]octan-6-one

Abstract

Ring-opening copolymerization of a new bicyclic lactone, 2,5,7-trioxabicyclo[2.2.2]octan-6-one (TOB), with lactide (LA) provided a series of degradable copolyesters with tunable high glass transition temperatures ranging from 50 to 100 °C.

Thermally Stable and Chemically Recyclable Poly(ketal-ester)s Regulated by Floor Temperature

“…With our ongoing effort to advance the high-performance, chemically recyclable poly­(ketal-ester)­s, , herein, we report an efficient synthetic method of a 18-membered macrocyclic diester (HOD) from biosourced material, designed to overcome the aforementioned trade-offs in developing macrocyclic monomer-based circular polymers. HOD displays an ideal T f of 115 °C (1 M), enabling its rapid polymerization at temperatures that are viable for industrial processes.…”

Structure–property relationships in renewable composites of poly(lactic acid) reinforced by low amounts of micro- and nano-kraft-lignin

“…, T m ∼ 140–190 °C) temperatures. 16,19–22 More interestingly, the semicrystalline character of PLA provides the ability to tune a series of properties, such as the mechanical performance 23,24 and thermal conductivity, via the easily manipulable crystallinity and semicrystalline morphology (dense/sparse). 25–27 Interestingly, depending on the structure, molecular weight and the thermal treatment, PLA can be transformed from completely amorphous to quite highly crystalline form.…”

“…20,21,25,28 Except for the PLA's performance within the application, there is a general desire to facilitate its physical degradation, for example in soil – compostability, which in the case of bulk PLA is rather slow. 8,29 Additionally, PLA exhibits high potential for combination with other polymers (copolymers, blends, interpenetrating polymer networks, and stars) 12,22,30–32 as well as with inorganic/organic fillers and nanoparticles. 24,33,34 The latter case, i.e.…”