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Degradable blends of semi-crystalline and amorphous branched poly(caprolactone): Effect of microstructure on blend properties

Title data

Agarwal, Seema ; Speyerer, Christian:
Degradable blends of semi-crystalline and amorphous branched poly(caprolactone): Effect of microstructure on blend properties.
In: Polymer. Vol. 51 (2 March 2010) Issue 5 . - 1024 - 1032.
ISSN 0032-3861
DOI: https://doi.org/10.1016/j.polymer.2010.01.020

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The blend properties of semi-crystalline and amorphous polycaprolactone (PCL) are shown here for the first time. The amorphous polycaprolactone (PCLB) having 20 branches was made by radical-ring-opening polymerization of 2-methylene-1,3-dioxepane. The presence of branches led to non-crystallinity in PCLB. The blends were made in solution in entire concentration range and showed some very interesting properties in terms of synergistic effect on crystallinity leading to the increased crystallinity of {PCL} and induced crystallinity of amorphous PCLB, minima in the elongation and maxima in spherulite size depending upon the ratio of amorphous and crystalline part. There was a drastic increase in the compostability as compared to pure {PCL} on adding even low of amorphous {PCLB} in the blends without affecting the thermal stability. The addition of {PCLB} also affected the transparency and it increased exponentially from about 8 at 650 nm for {PCL} to about 45 for a blend with composition PCL:PCLB 30:70.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Poly(epsilon-caprolactone); 2-Methylene-1,3-dioxepane; Degradable blend
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 07 Apr 2015 13:35
Last Modified: 07 Apr 2015 13:35
URI: https://eref.uni-bayreuth.de/id/eprint/9886