In this study, a highly crystallizable and an amorphous polylactide (i.e., cPLA and aPLA) with, respectively, low (0.5 mol. %) and high (12 mol. %) d-lactic acid contents and similar molecular weights were melt compounded with two different multifunctional epoxy-based Joncryl chain extenders (CEs, i.e., ADR 4400 and 4468) at 190 °C. Reactivity of Joncryl grades with aPLA was also explored at melt processing temperatures of 150, 170, and 210 °C. Small amplitude oscillatory shear rheological analysis was conducted to understand the extent of the Joncryl reaction with PLA molecules, and the results were confirmed with molecular weight determination using gel permeation chromatography. Extensional viscosity of the processed samples was also compared to control their strain hardening behavior. Results showed that the Joncryl reaction with cPLA and aPLA differs in terms of preference for chain extension or branching, indicating that molecular regularity affected the interactions with both Joncryl grades during reactive melt processing. Moreover, although the increase in processing temperature accelerated PLA degradation, it noticeably increased the reactivity of both Joncryl grades with aPLA. In all cases, ADR 4468 was more reactive in molecular chain extension/branching due to its higher functionality than ADR 4400. Differential scanning calorimetry results also revealed that the crystallization of cPLA was differently affected by the change in the Joncryl content and type.
Skip Nav Destination
,
,
,
,
,
,
Article navigation
March 2024
Research Article|
February 13 2024
Joncryl chain extender reactivity with polylactide: Effect of d-lactide content, Joncryl type, and processing temperature Available to Purchase
Yavuz Akdevelioğlu
;
Yavuz Akdevelioğlu
1
Sustainable & Green Plastics Laboratory, Metallurgical & Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University
, Istanbul 34469, Turkey
Search for other works by this author on:
M. Begum Alanalp
;
M. Begum Alanalp
2
Department of Chemical Engineering, Faculty of Engineering, Istanbul University-Cerrahpasa
, Avcılar, Istanbul 34320, Turkey
Search for other works by this author on:
Ferit Siyahcan;
Ferit Siyahcan
1
Sustainable & Green Plastics Laboratory, Metallurgical & Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University
, Istanbul 34469, Turkey
Search for other works by this author on:
Jed Randall
;
Jed Randall
3
NatureWorks LLC
, 17400 Medina Road, Suite 800, Plymouth, Minnesota 55447
Search for other works by this author on:
Michael Gehrung;
Michael Gehrung
3
NatureWorks LLC
, 17400 Medina Road, Suite 800, Plymouth, Minnesota 55447
Search for other works by this author on:
Ali Durmus
;
Ali Durmus
2
Department of Chemical Engineering, Faculty of Engineering, Istanbul University-Cerrahpasa
, Avcılar, Istanbul 34320, Turkey
Search for other works by this author on:
Mohammadreza Nofar
Mohammadreza Nofar
a)
1
Sustainable & Green Plastics Laboratory, Metallurgical & Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University
, Istanbul 34469, Turkey
a)Author to whom correspondence should be addressed; electronic mail: [email protected]
Search for other works by this author on:
Yavuz Akdevelioğlu
1
M. Begum Alanalp
2
Ferit Siyahcan
1
Jed Randall
3
Michael Gehrung
3
Ali Durmus
2
Mohammadreza Nofar
1,a)
1
Sustainable & Green Plastics Laboratory, Metallurgical & Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University
, Istanbul 34469, Turkey
2
Department of Chemical Engineering, Faculty of Engineering, Istanbul University-Cerrahpasa
, Avcılar, Istanbul 34320, Turkey
3
NatureWorks LLC
, 17400 Medina Road, Suite 800, Plymouth, Minnesota 55447
a)Author to whom correspondence should be addressed; electronic mail: [email protected]
J. Rheol. 68, 247–262 (2024)
Article history
Received:
July 02 2023
Accepted:
January 23 2024
Citation
Yavuz Akdevelioğlu, M. Begum Alanalp, Ferit Siyahcan, Jed Randall, Michael Gehrung, Ali Durmus, Mohammadreza Nofar; Joncryl chain extender reactivity with polylactide: Effect of d-lactide content, Joncryl type, and processing temperature. J. Rheol. 1 March 2024; 68 (2): 247–262. https://doi.org/10.1122/8.0000718
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Linear viscoelasticity of nanocolloidal suspensions from probe rheology molecular simulations
Dinesh Sundaravadivelu Devarajan, Rajesh Khare
Unifying homogeneous and inhomogeneous rheology of dense suspensions
Bhanu Prasad Bhowmik, Christopher Ness
Related Content
How the molecular weight of a polyester could influence the reactivity of Joncryl chain extender?
AIP Conf. Proc. (October 2023)
Super enhancement of rheological properties of amorphous PLA through generation of a fiberlike oriented crystal network
J. Rheol. (July 2021)
Biodegradable polyesters reinforced with eucalyptus fiber: Effect of reactive agents
AIP Conf. Proc. (December 2017)
Effect of chemical and physical branching on rheological behavior of polylactide
J. Rheol. (July 2015)
Modified polylactide with improved properties for extrusion foaming
AIP Conf. Proc. (January 2019)