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Biodegradable polymers from petrochemical sources

Aliphatic polyesters are the representatives of synthetic biodegradable pofymers. [Pg.28]

Synthetic biodegradable polyesters are general made by the pofycondensation method and raw materials are obtained from petrochemical feed stocks. Aliphatic polyesters such as pofy(butylene succinate) and poly( -caprolactone) are cormnercially produced. Besides these ahphatic pofyesters, various types of synthethic biodegradable polymers have been designed [33]. They are, for example, poly(ester amide)s, pofy(ester carbonate)s, pofy(ester urethane)s, etc. Most of them are still at a premature stage. [Pg.28]

The traditional of synthesizing polyesters has been by pofycondensation using diols and [Pg.28]

Recently, enzyme-catalysed polymer synthesis has been established as another approach to biodegradable polymer preparation [35-37]. [Pg.28]

One of the most promising polymers in this family is poly(bntylene succinate) (PBS), which is chemically synthesized by the polycondensation of 1,4-bntanediol with succinic [Pg.28]


BIODEGRADATION OF BIODEGRADABLE POLYMERS FROM PETROCHEMICAL SOURCES... [Pg.142]

PCL -OCH CH CH CH CH CO-ln) is a partially-crystalline polyester that is biodegraded by microbial lipases and esterases. The plastic is made from petrochemical feedstocks. It has too low a melting point (60°C) to be useful in any packaging applications. Higher aliphatic polyesters such as poly(butylene succinate) (PBS) (-0(CH2) OC(CH2)2CO-)n and poly(ethylene succinate) (PES) (-OCCH l OOCCCH l CO-) are also biodegradable at a rate that depends on environmental factors (Kasuya et al., 1997). They have higher melting points of 112-114°C and 103-106°C, respectively, and the properties compare well to those of polyolefins. As succinic acid can be derived from plant sources, the polysuccinates can be potentially a bio-based polymer. [Pg.169]


See other pages where Biodegradable polymers from petrochemical sources is mentioned: [Pg.28]    [Pg.52]    [Pg.77]    [Pg.28]    [Pg.52]    [Pg.77]    [Pg.131]    [Pg.239]    [Pg.247]    [Pg.455]    [Pg.166]    [Pg.2]    [Pg.312]    [Pg.812]    [Pg.415]    [Pg.50]    [Pg.24]    [Pg.576]    [Pg.2]    [Pg.180]    [Pg.212]    [Pg.240]    [Pg.206]    [Pg.67]    [Pg.576]    [Pg.64]    [Pg.64]    [Pg.3]    [Pg.95]    [Pg.149]    [Pg.98]    [Pg.95]    [Pg.162]    [Pg.107]   


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Biodegradable polymers from petrochemical

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