Summary 1 Introduction 2 Chemical structure of polyester elastomers 2.1 Copoly(ether ester)s with poly(alkylene oxide) segments 2.2 Copoly (ether ester)s with modified PBT segments 2.3 Branched copoly(ether ester)s 3 Synthesis of poly(ether ester) block copolymers 3.1 Transesterification of ...
Structure property studies of polyester‐ and polyether‐based MDI–BD segmented polyurethanes: Effect of one‐ vs. two‐stage polymerization conditions The effect of the polymerization method (one-or two-stage) on the morphology and properties of specific polyether- and polyester-based urethanes was ...
Effects of chemical composi- tion and structure of unsaturated polyester resins on the miscibility, cured sample morphology and mechanical properties of styrene/unsaturated polyester/low-profile additive ternary systems: 2. Mechanical properties. Polymer 1998; 39(26): 7049-7059....
Schematic overview of TPU The polyols used in this reaction are generally polyester, polyether or polycarbonate diols with molecular weights of between 1000 and 4000. Some common short-chain diols are butane diol, hexane diol or aromatic diols. For the diisocyanate component, diphenyl meth...
The chemical synthesis via ring-opening polymerization (ROP) of cyclic esters (lactones or lactides), a process typically catalyzed by a metal-based or organic catalyst, offers an alternative route to such technologically important biodegradable aliphatic polyesters21,22,23,24,25,26,27,28, which ...
Basically, the conversion of these “recalcitrant” resource relies on the use thermochemical or enzymatic processes to break down the complex structure of the lignocellulosic material into its main constituents: cellulose, hemicellulose, and lignin. After a single multistage separation procedure, each com...
of self-healing polymers. In 2002, Chen et al. [18] introduced a polymer with a cross-linked structure capable of repair through heat application via the Diels–Alder/retro-Diels–Alder (DA/rDA) reaction, marking the inception of the first intrinsic self-healing polymer based on reversible ...
also limits its impact107. When the temperature ranges from ambient temperature to more than 600 °C, the complex aromatic ring component of the lignin structure decomposes with a minimum weight loss rate9,109. Tables3and4depicts the comparison between the thermal study (3) and Mass loss at ...
Unsaturated polyester resins with different allyl ethers as crosslinking built-in monomers The effect of the structure of allyl ethers used as built-in monomers of unsaturated polyester resins on the properties of the coatings obtained have been ... Gabriel,Rokicki,and,... - 《Journal of Applied...
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