TY - JOUR
T1 - Melt-Miscible Oxalamide Based Nucleating Agents and Their Nucleation Efficiency in Isotactic Polypropylene
AU - Deshmukh, Yogesh S.
AU - Wilsens, Carolus H. R. M.
AU - Leone, Nils
AU - Portale, Giuseppe
AU - Harings, Jules A. W.
AU - Rastogi, Sanjay
PY - 2016/11/16
Y1 - 2016/11/16
N2 - In this study, the performance of three aliphatic oxalamide based compounds as nucleating agent (NA) for isotactic polypropylene (iPP) has been evaluated. The NAs evaluated in this study contain two oxalamide motifs that are connected through linking spacers with 2, 3, or 4 methylene units in between the oxalamide groups, while containing flexible hexyl end-groups on the outside. It is demonstrated that the onset of crystallization in the presence of these NAs under quiescent conditions, generally observed around 120-125 degrees C, is strongly dependent on both the crystallization conditions and NA concentration. Although these oxalamide compounds are only moderately effective under quiescent conditions, they show promise for use under industrially relevant processing conditions that require high cooling and shear rates: When the NA is forced to undergo shear-induced self-assembly and shear alignment during cooling, the onset of crystallization of the iPP phase is observed in SAXS at temperatures up to 140 degrees C.
AB - In this study, the performance of three aliphatic oxalamide based compounds as nucleating agent (NA) for isotactic polypropylene (iPP) has been evaluated. The NAs evaluated in this study contain two oxalamide motifs that are connected through linking spacers with 2, 3, or 4 methylene units in between the oxalamide groups, while containing flexible hexyl end-groups on the outside. It is demonstrated that the onset of crystallization in the presence of these NAs under quiescent conditions, generally observed around 120-125 degrees C, is strongly dependent on both the crystallization conditions and NA concentration. Although these oxalamide compounds are only moderately effective under quiescent conditions, they show promise for use under industrially relevant processing conditions that require high cooling and shear rates: When the NA is forced to undergo shear-induced self-assembly and shear alignment during cooling, the onset of crystallization of the iPP phase is observed in SAXS at temperatures up to 140 degrees C.
U2 - 10.1021/acs.iecr.6b03120
DO - 10.1021/acs.iecr.6b03120
M3 - Article
SN - 0888-5885
VL - 55
SP - 11756
EP - 11766
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
IS - 45
ER -