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Polymer blends of polylactic acid (P...

Ma, Wenguang.

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Polymer blends of polylactic acid (PLA) and polybutylene succinate-adipate.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Polymer blends of polylactic acid (PLA) and polybutylene succinate-adipate./
作者:	Ma, Wenguang.
面頁冊數:	101 p.
附註:	Adviser: Stephen P. McCarthy.
Contained By:	Dissertation Abstracts International69-03B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3305186
ISBN:	9780549513407

Polymer blends of polylactic acid (PLA) and polybutylene succinate-adipate.
Ma, Wenguang.

Polymer blends of polylactic acid (PLA) and polybutylene succinate-adipate. - 101 p.

Adviser: Stephen P. McCarthy.

Thesis (Ph.D.)--University of Massachusetts Lowell, 2008.

A series of blends consisting of polylactic acid (PLA) and aliphatic succinate polyester (BionolleRTM #3000) had been prepared and investigated. The results of mechanical property investigations showed that using 20 wt% Bionolle#3000 can significantly increase the toughness of PLA. BionolleRTM #3000 also reduces the physical aging rate of PLA so blends remain tough longer. Conversely, the stiffness of BionolleRTM #3000 can be significantly increased by blending in PLA. DMA and DSC results show that PLA/BionolleRTM 3000 blends are not thermodynamically miscible, but are compatible blends.

ISBN: 9780549513407Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Polymer blends of polylactic acid (PLA) and polybutylene succinate-adipate.
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245 1 0 $a Polymer blends of polylactic acid (PLA) and polybutylene succinate-adipate.
300 $a 101 p.
500 $a Adviser: Stephen P. McCarthy.
500 $a Source: Dissertation Abstracts International, Volume: 69-03, Section: B, page: 1677.
502 $a Thesis (Ph.D.)--University of Massachusetts Lowell, 2008.
520 $a A series of blends consisting of polylactic acid (PLA) and aliphatic succinate polyester (BionolleRTM #3000) had been prepared and investigated. The results of mechanical property investigations showed that using 20 wt% Bionolle#3000 can significantly increase the toughness of PLA. BionolleRTM #3000 also reduces the physical aging rate of PLA so blends remain tough longer. Conversely, the stiffness of BionolleRTM #3000 can be significantly increased by blending in PLA. DMA and DSC results show that PLA/BionolleRTM 3000 blends are not thermodynamically miscible, but are compatible blends.
520 $a Studies have also been performed to determine the amount and rate of aerobic biodegradation of PLA/aliphatic succinate polyester blends in biologically active composting, enzymatic, and soil environments. The changes in molecular weight, molecular structure and thermal properties in the composting environment were also studied by GPC, NMR and DSC analyses. The research results showed BionolleRTM #3000 had a high degradation rate, while PLA had a low degradation rate. PLA/BionolleRTM #3000 blends had moderate degradation rates that increased with BionolleRTM #3000 content.
520 $a The melt flow behavior of PLA/BionolleRTM #3000 blends has been studied by capillary rheometry. The relationship of the blends' viscosity with their composition, shear stress, shear rate, and temperature has been investigated. Power law index and activation energy of PLA, BionolleRTM #3000 and their blends have been calculated. The experimental and theoretical data can let us understand the processability of PLA/BionolleRTM #3000 blends.
520 $a A scanning electron microscope (SEM) was used to investigate the morphological structure of the PLA/BionolleRTM #3000 blends. Micrographs of the samples made from different methods (blown film, extrudate and compression molding sheet) were taken; their differences in morphology were compared. For comparison, the micrographs of blend PLA/BionolleRTM #6000 was also studied.
520 $a The results show that BionolleRTM #3000 has a very strong ability to form the continuous phase in the blends and in films made from the blends. A partial continuous net structure with very thin wall thickness (0.1&sim;0.2 mum) can form in blends with 20 part of BionolleRTM #3000. The reason why PLA/BionolleRTM #6000 blends do not have good mechanical properties is that the size of the phase domain is too big (five times that of PLA/BionolleRTM #3000 blends).
590 $a School code: 0111.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Engineering, Materials Science. $3 1017759
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710 2 $a University of Massachusetts Lowell. $3 1017839
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791 $a Ph.D.
792 $a 2008
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