Poly Butylene Succinate PBS

Poly(butylene succinate) belongs to the poly(alkylene dicarboxylate) family that can be obtained by polycondensation of a,o -diols such as ethylene glycol and 1,4-butanediol, with aliphatic dicarboxylic acids, such as succinic and adipic acid. PBS is commonly prepared via esterification of succinic acid and BDO or transesterification of dimethyl succinate and BDO to oligomers followed by a subsequent polycondensation reaction, removing excess BDO. Catalysts include SnCh [81], p-toluenesulfonic acid [82], tetrabutyltitanate [83] and lanthanide triflates [84]. To produce PBS with sufficiently high molar mass often chain-extenders are used. Examples are the use of diisocyanates [83,85-87], bisoxazoline [88] and biscaprolactamates [89]. 

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Bionolle is an aliphatic polyester as shown in Fig. 2. We have two grades for Bionolle poly(butylene succinate) (PBS) and poly(butylene succinate/adipate) (PBSA), the copolymer of 1,4-butandiol and succinic acid/adipic acid. We call PBS the 1000 series, and PBSA the 3000 series. PBSA with higher adipic acid content is the 5000 series. 

Lee and Wang [80] investigated the effects of lysine-based diisocyanate (LDI) as a coupling agent on the properties of biocomposites from PLA, poly (butylene succinate) (PBS) and bamboo fiber (BF). They observed that the tensile properties, water resistance, and interfacial adhesion of both PLA/BF and PBS/BF composites were improved by the addition of LDI, but thermal flow [81] was hindered due to cross-linking between polymer matrix and BF. Enzymatic biodegradability of... 

The phase separation of reactants hindered attempts to carry out lipase-catalyzed synthesis of poly(butylene succinate) (PBS) from succinic acid and 1,4-butanediol via dehydration. Therefore, in order to obtain a monophasic reaction mixture, dimethyl succinate was used in place of succinic acid. [49] The reaction mixture remained monophasic during the reaction course, and after 21 h at 95 °C PBS with M of 38000 was obtained. 

Poly(butylene succinate) (PBS) is an important member of biodegradable aliphatic polyester family. PBS and related copolymers have shown considerable promise for uses as environmentally biodegradable thermoplastics, as well as bioabsorbable/biocompatible medical materials (/). In both cases, practical applications require that the polymer possess a high molecular weight (M >20,000) so that it can have useful mechanical properties. 

Two stage enzymatic reaction to prepare high molecular weight poly(butylene succinate) (PBS)... 

Figure 21.9 The biodegradable polyester family poly(hydroxyalkanoates) (PHA), poly(hydroxybulyrate) (PHB), poly(hydro3qdiexanoate) (PHH), poly(hydrox3rvalerate] (PHV), polyflactic acid) (PLA), poly(caprolactone) fPCL), poly(butylene succinate) (PBS), poly(butylene succinate adipate) (PBSA), aliphatic-aromatic copolyesters (AAC), poly(ethylene terephthalate) (PET), poly(butylene adipate/terephthalate) (PBAT), poly(methylene adipate/terephthalate) (PTMAT). Adapted from [103].

Bionolle is a copolymer of 1,4-butanediol and succinic acid (i.e., poly(butylene succinate), PBS) or 1,4-butanediol and both succinic and adipic acid (i.e., poly(butylene succinate/adipate), PBSA) developed by Showa Denko. It can be considered to be one of the frontrunners in packaging applications [160]. Bionolle is... 

Tsuneizumi et al. [13] studied the chemical recycling of poly(lactic acid)-based polymer blends using environmentally benign catalysts, clay catalysts, and enzymes. Poly(L-lactic acid) (PLLA)-based polymer blends (e.g., PLLA/polyethylene [PE] and PLLA/poly(butylenes succinate) [PBS]) were degraded into repolymerizable oligomer. 

An important group of enzymatically derived polymers is polyesters. In nature, they hold the fourth place after the three major biomacromolecules (nucleic acids, proteins, and polysaccharides). Important polyesters are poly(ethylene terephthalate) (PET), poly(butylene succinate) (PBS), poly(e-caprolactone) (poly(e-CL)), and poly(lactic acid) (PLA) (see Fig. 3.40). The former two are industrially produced via polycondensation and the latter two via ROP. Additionally, enzymes can be used to hydrolyze ester bonds, which offers the possibility to recycle commercially used materials, for example, PET [52]. 

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