The effect of chain branching on the crystallinity behavior of polylactide with the presence of dissolved CO2

W. Zhu; M. Nofar; W. Zhai; C. B. Park; J. Randall

The effect of chain branching on the crystallinity behavior of polylactide with the presence of dissolved CO₂

W. Zhu^*, M. Nofar, W. Zhai, C. B. Park, J. Randall

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

This paper investigates the effect of chain extender on the crystallinity behavior of Polylactide with/without the presence of dissolved CO₂ by a high-pressure differential scanning calorimeter (HPDSC). It is shown that without CO₂, the crystallinity increases by decreasing the branched structure due to better chain regularity. With the presence of low-pressure (15bar) CO₂, the crystallinity of PLAs significantly increased due to CO₂'s great plasticization effect. However, with the increase of pressure (from 15bar to 45bar), crystallinity dramatically decreases, even though more CO₂ is dissolved. However, as the pressure increases from 45bar to 60bar, the crystallinity of all PLAs dramatically increases.

Original language	English
Title of host publication	69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011
Pages	2638-2642
Number of pages	5
Publication status	Published - 2011
Externally published	Yes
Event	69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011 - Boston, MA, United States Duration: 1 May 2011 → 5 May 2011

Publication series

Name	Annual Technical Conference - ANTEC, Conference Proceedings
Volume	3

Conference

Conference	69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011
Country/Territory	United States
City	Boston, MA
Period	1/05/11 → 5/05/11

Keywords

Chain branching
High pressure DSC
Melting crystallization
Polylactide

Cite this

@inproceedings{4ce6ff845dd24ee6b284d4374baf1d44,

title = "The effect of chain branching on the crystallinity behavior of polylactide with the presence of dissolved CO2",

abstract = "This paper investigates the effect of chain extender on the crystallinity behavior of Polylactide with/without the presence of dissolved CO2 by a high-pressure differential scanning calorimeter (HPDSC). It is shown that without CO2, the crystallinity increases by decreasing the branched structure due to better chain regularity. With the presence of low-pressure (15bar) CO2, the crystallinity of PLAs significantly increased due to CO2's great plasticization effect. However, with the increase of pressure (from 15bar to 45bar), crystallinity dramatically decreases, even though more CO2 is dissolved. However, as the pressure increases from 45bar to 60bar, the crystallinity of all PLAs dramatically increases.",

keywords = "Chain branching, High pressure DSC, Melting crystallization, Polylactide",

author = "W. Zhu and M. Nofar and W. Zhai and Park, {C. B.} and J. Randall",

year = "2011",

language = "English",

isbn = "9781617829604",

series = "Annual Technical Conference - ANTEC, Conference Proceedings",

pages = "2638--2642",

booktitle = "69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011",

note = "69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011 ; Conference date: 01-05-2011 Through 05-05-2011",

}

Zhu, W, Nofar, M, Zhai, W, Park, CB & Randall, J 2011, The effect of chain branching on the crystallinity behavior of polylactide with the presence of dissolved CO₂. in 69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011. Annual Technical Conference - ANTEC, Conference Proceedings, vol. 3, pp. 2638-2642, 69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011, Boston, MA, United States, 1/05/11.

The effect of chain branching on the crystallinity behavior of polylactide with the presence of dissolved CO₂. / Zhu, W.; Nofar, M.; Zhai, W. et al.
69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011. 2011. p. 2638-2642 (Annual Technical Conference - ANTEC, Conference Proceedings; Vol. 3).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - The effect of chain branching on the crystallinity behavior of polylactide with the presence of dissolved CO2

AU - Zhu, W.

AU - Nofar, M.

AU - Zhai, W.

AU - Park, C. B.

AU - Randall, J.

PY - 2011

Y1 - 2011

N2 - This paper investigates the effect of chain extender on the crystallinity behavior of Polylactide with/without the presence of dissolved CO2 by a high-pressure differential scanning calorimeter (HPDSC). It is shown that without CO2, the crystallinity increases by decreasing the branched structure due to better chain regularity. With the presence of low-pressure (15bar) CO2, the crystallinity of PLAs significantly increased due to CO2's great plasticization effect. However, with the increase of pressure (from 15bar to 45bar), crystallinity dramatically decreases, even though more CO2 is dissolved. However, as the pressure increases from 45bar to 60bar, the crystallinity of all PLAs dramatically increases.

AB - This paper investigates the effect of chain extender on the crystallinity behavior of Polylactide with/without the presence of dissolved CO2 by a high-pressure differential scanning calorimeter (HPDSC). It is shown that without CO2, the crystallinity increases by decreasing the branched structure due to better chain regularity. With the presence of low-pressure (15bar) CO2, the crystallinity of PLAs significantly increased due to CO2's great plasticization effect. However, with the increase of pressure (from 15bar to 45bar), crystallinity dramatically decreases, even though more CO2 is dissolved. However, as the pressure increases from 45bar to 60bar, the crystallinity of all PLAs dramatically increases.

KW - Chain branching

KW - High pressure DSC

KW - Melting crystallization

KW - Polylactide

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SN - 9781617829604

T3 - Annual Technical Conference - ANTEC, Conference Proceedings

SP - 2638

EP - 2642

BT - 69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011

T2 - 69th Annual Technical Conference of the Society of Plastics Engineers 2011, ANTEC 2011

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