TY - GEN
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
UR - http://www.scopus.com/inward/record.url?scp=80051821880&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80051821880
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
Y2 - 1 May 2011 through 5 May 2011
ER -