| dc.creator |
Ndazi, Bwire S. |
|
| dc.creator |
Karlssion, S. |
|
| dc.date |
2016-03-11T11:05:41Z |
|
| dc.date |
2016-03-11T11:05:41Z |
|
| dc.date |
2011 |
|
| dc.date.accessioned |
2018-03-27T08:36:47Z |
|
| dc.date.available |
2018-03-27T08:36:47Z |
|
| dc.identifier |
Ndazi, B.S. and Karlsson, S., 2011. Characterization of hydrolytic degradation of polylactic acid/rice hulls composites in water at different temperatures. Express Polym Lett, 5, pp.119-131. |
|
| dc.identifier |
http://hdl.handle.net/123456789/868 |
|
| dc.identifier |
10.3144/expresspolymlett.2011.13 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/2741 |
|
| dc.description |
. Hydrolytic degradations of polylactic acid/rice hulls (PLA/RH) composites with various rice hulls contents due
to water absorptions at 23, 51 and 69°C were investigated by studying the thermal properties, chemical composition,
molecular weight, and morphology of the degraded products. The results have attested that the stability of PLA/RH composites
in water depends slightly on rice hulls contents but it is significantly influenced by water temperature. Water absorption
in 30 days at 23°C was between 0.87 and 9.25% depending on rice hull contents. However, at thermophilic
temperatures, the water absorption and degradation of these products were increased significantly. Saturations were
achieved in less than 25 and 9 days at 51°C and 69°C, respectively, while hydrolytic degradation was demonstrated by an
increase in fragility and development of crystallinity. At 69°C, there were significant reductions of the decomposition and
glass transition temperatures of the polymer by 13°C. These changes were associated with the reduction of the molecular
weight of PLA from 153.1 kDa to !10.7 kDa due to hydrolysis of its ester group. |
|
| dc.language |
en |
|
| dc.publisher |
Express Polym Lett |
|
| dc.subject |
biodegradable polymers |
|
| dc.subject |
polylactic acid |
|
| dc.subject |
rice hulls |
|
| dc.subject |
hydrolytic degradation |
|
| dc.subject |
molecular weight |
|
| dc.title |
Characterization of Hydrolytic Degradation of Polylactic acid/Rice Hulls Composites in Water at Different Temperatures |
|
| dc.type |
Journal Article |
|