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Structure-Property Relationships of ...

Panthani, Tessie Rose.

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Structure-Property Relationships of Poly(lactide)-based Triblock and Multiblock Copolymers.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Structure-Property Relationships of Poly(lactide)-based Triblock and Multiblock Copolymers./
作者:	Panthani, Tessie Rose.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	221 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.
Contained By:	Dissertation Abstracts International77-08B(E).
標題:	Plastics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10076334
ISBN:	9781339586359

Structure-Property Relationships of Poly(lactide)-based Triblock and Multiblock Copolymers.
Panthani, Tessie Rose.

Structure-Property Relationships of Poly(lactide)-based Triblock and Multiblock Copolymers. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 221 p.

Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.

Thesis (Ph.D.)--University of Minnesota, 2016.

Replacing petroleum-based plastics with alternatives that are degradable and synthesized from annually renewable feedstocks is a critical goal for the polymer industry. Achieving this goal requires the development of sustainable analogs to commodity plastics which have equivalent or superior properties (e.g. mechanical, thermal, optical etc.) compared to their petroleum-based counterparts. This work focuses on improving and modulating the properties of a specific sustainable polymer, poly(lactide) (PLA), by incorporating it into triblock and multiblock copolymer architectures.

ISBN: 9781339586359Subjects--Topical Terms:

649803
Plastics.

Structure-Property Relationships of Poly(lactide)-based Triblock and Multiblock Copolymers.
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245 1 0 $a Structure-Property Relationships of Poly(lactide)-based Triblock and Multiblock Copolymers.
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500 $a Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.
500 $a Adviser: Frank S. Bates.
502 $a Thesis (Ph.D.)--University of Minnesota, 2016.
520 $a Replacing petroleum-based plastics with alternatives that are degradable and synthesized from annually renewable feedstocks is a critical goal for the polymer industry. Achieving this goal requires the development of sustainable analogs to commodity plastics which have equivalent or superior properties (e.g. mechanical, thermal, optical etc.) compared to their petroleum-based counterparts. This work focuses on improving and modulating the properties of a specific sustainable polymer, poly(lactide) (PLA), by incorporating it into triblock and multiblock copolymer architectures.
520 $a The multiblock copolymers in this work are synthesized directly from dihydroxy-terminated triblock copolymers by a simple step-growth approach: the triblock copolymer serves as a macromonomer and addition of stoichiometric quantities of either an acid chloride or diisocyanate results in a multiblock copolymer. This work shows that over wide range of compositions, PLA-based multiblock copolymers have superior mechanical properties compared to triblock copolymers with equivalent chemical compositions and morphologies. The connectivity of the blocks within the multiblock copolymers has other interesting consequences on properties. For example, when crystallizable poly(L-lactide)-based triblock and multiblock copolymers are investigated, it is found that the multiblock copolymers have much slower crystallization kinetics. Additionally, the total number of blocks connected together is found to effect the linear viscoelastic properties as well as the alignment of lamellar domains under uniaxial extension. Finally, the synthesis and characterization of pressure-sensitive adhesives based upon renewable PLA-containing triblock copolymers and a renewable tackifier is detailed. Together, the results give insight into the effect of chain architecture, composition, and morphology on the mechanical behavior, thermal properties, and rheological properties of PLA-based materials.
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