東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Synthesis of Cyclic and Linear Poly(...

Shaik, Muneer.

Linked to FindBook

Google Book

Amazon

博客來

Synthesis of Cyclic and Linear Poly(Hydroxybutyrates) by Ring-Opening Polymerization of beta-Butyrolactone with Amido-Oxazolinate Zinc Catalysts.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Synthesis of Cyclic and Linear Poly(Hydroxybutyrates) by Ring-Opening Polymerization of beta-Butyrolactone with Amido-Oxazolinate Zinc Catalysts./
Author:	Shaik, Muneer.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	76 p.
Notes:	Source: Masters Abstracts International, Volume: 58-02.
Contained By:	Masters Abstracts International58-02(E).
Subject:	Inorganic chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10845075
ISBN:	9780438395664

Synthesis of Cyclic and Linear Poly(Hydroxybutyrates) by Ring-Opening Polymerization of beta-Butyrolactone with Amido-Oxazolinate Zinc Catalysts.
Shaik, Muneer.

Synthesis of Cyclic and Linear Poly(Hydroxybutyrates) by Ring-Opening Polymerization of beta-Butyrolactone with Amido-Oxazolinate Zinc Catalysts. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 76 p.

Source: Masters Abstracts International, Volume: 58-02.

Thesis (M.S.)--The University of North Dakota, 2018.

A series of amido-oxazolinate zinc complexes have been employed for the ring opening polymerization of beta-butyrolactone (BBL). Experimental results show that these complexes efficiently catalyze the reactions, yielding cyclic poly(hydroxybutyrate)s (PHBs) with high molecular weights (M n up to 196 kg/mol) and low dispersity. In contrast, in the presence of alcohol co-catalysts, the zinc-catalyzed ring-opening polymerization (ROP) reactions lead to the formation of linear PHBs end-capped by the alcohol initiator and hydroxylbutyrate. A possible mechanism for cyclic PHBs is proposed, in which the zinc catalysts function as a loose Lewis pair at elevated temperature, followed by a fast propagation through a zwitterionic intermediate. Use of diols such as 1,4-cyclohexane diol and 1,4-benzenedimethanol results in the formation of polyester diols. The thermal properties were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to differentiate between the cyclic and linear polyesters.

ISBN: 9780438395664Subjects--Topical Terms:

3173556
Inorganic chemistry.

Synthesis of Cyclic and Linear Poly(Hydroxybutyrates) by Ring-Opening Polymerization of beta-Butyrolactone with Amido-Oxazolinate Zinc Catalysts.
LDR:02038nmm a2200313 4500 001 2203737
005 20190606091702.5
008 201008s2018 ||||||||||||||||| ||eng d
020 $a 9780438395664
035 $a (MiAaPQ)AAI10845075
035 $a (MiAaPQ)und:11363
035 $a AAI10845075
040 $a MiAaPQ $c MiAaPQ
100 1 $a Shaik, Muneer. $3 3430541
245 1 0 $a Synthesis of Cyclic and Linear Poly(Hydroxybutyrates) by Ring-Opening Polymerization of beta-Butyrolactone with Amido-Oxazolinate Zinc Catalysts.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 76 p.
500 $a Source: Masters Abstracts International, Volume: 58-02.
500 $a Adviser: Guodong Du.
502 $a Thesis (M.S.)--The University of North Dakota, 2018.
520 $a A series of amido-oxazolinate zinc complexes have been employed for the ring opening polymerization of beta-butyrolactone (BBL). Experimental results show that these complexes efficiently catalyze the reactions, yielding cyclic poly(hydroxybutyrate)s (PHBs) with high molecular weights (M n up to 196 kg/mol) and low dispersity. In contrast, in the presence of alcohol co-catalysts, the zinc-catalyzed ring-opening polymerization (ROP) reactions lead to the formation of linear PHBs end-capped by the alcohol initiator and hydroxylbutyrate. A possible mechanism for cyclic PHBs is proposed, in which the zinc catalysts function as a loose Lewis pair at elevated temperature, followed by a fast propagation through a zwitterionic intermediate. Use of diols such as 1,4-cyclohexane diol and 1,4-benzenedimethanol results in the formation of polyester diols. The thermal properties were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to differentiate between the cyclic and linear polyesters.
590 $a School code: 0156.
650 4 $a Inorganic chemistry. $3 3173556
650 4 $a Polymer chemistry. $3 3173488
650 4 $a Organic chemistry. $3 523952
690 $a 0488
690 $a 0495
690 $a 0490
710 2 $a The University of North Dakota. $b Chemistry. $3 3281160
773 0 $t Masters Abstracts International $g 58-02(E).
790 $a 0156
791 $a M.S.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10845075