The nucleation effect of modified carbon black on crystallization of poly(lactic acid)

2010 ◽  
Vol 50 (8) ◽  
pp. 1658-1666 ◽  
Author(s):  
Zhizhong Su ◽  
Qiuying Li ◽  
Yongjun Liu ◽  
Weihong Guo ◽  
Chifei Wu
Author(s):  
Jipeng Guo ◽  
Chi-Hui Tsou ◽  
Yongqi Yu ◽  
Chin-San Wu ◽  
Xuemei Zhang ◽  
...  

2018 ◽  
Vol 136 (13) ◽  
pp. 47273 ◽  
Author(s):  
Thaís Ferreira da Silva ◽  
Fernanda Menezes ◽  
Larissa Stieven Montagna ◽  
Ana Paula Lemes ◽  
Fabio Roberto Passador

2008 ◽  
Vol 93 (6) ◽  
pp. 1044-1052 ◽  
Author(s):  
Ning Wang ◽  
Xingxiang Zhang ◽  
Xiaofei Ma ◽  
Jianming Fang

Author(s):  
Nicolas Candau ◽  
Oguzhan Oguz ◽  
Noel León Albiter ◽  
Gero Förster ◽  
Maria Lluïsa Maspoch

Poly (Lactic Acid) (PLA) / Ground Tire Rubber (GTR) blends using Dicumyl peroxide (DCP) as a crosslinking agent were prepared as a route to recycle wastes rubber from the automotive industry. The GTR were exposed to grinding and exhibited mechanical damage, traduced at the rubber network scale by chains scission and/or chemical cross-links breakage. Such damage is accompanied by a decrease of 80% of the rubber chains network density of the initial tire buffing but found independent on the type of grinding (cryogenic, dry ambient) or on the GTR size (from <400 µm to <63 µm). Moreover, the finest sieved GTR contain the largest the amount of reinforcing elements (carbon black, clay) that can be advantageously used in PLA/GTR blends. The melt-blending of these finest GTR particles obtained by cryo-grinding at an amount of 15 wt.% and in presence of the crosslinking agent (DCP), resulted in an optimum improvement of the ductility, energy at break and impact strength of the PLA/GTR blends as compared to neat PLA, while maintaining its stiffness. The results were attributed to (i) the good dispersion of the fine GTR particles into the PLA matrix, (ii) the partial re-crosslinking of the GTR particles and co-crosslinking at PLA/GTR interface and (iii) the presence of reinforcing carbon black into the GTR particles and clay particles dispersed into the PLA matrix.


2009 ◽  
Vol 47 (20) ◽  
pp. 1971-1980 ◽  
Author(s):  
Zhizhong Su ◽  
Qiuying Li ◽  
Yongjun Liu ◽  
Guo-Hua Hu ◽  
Chifei Wu

2014 ◽  
Vol 887-888 ◽  
pp. 716-722
Author(s):  
Nai Xu ◽  
Xing Hui Wang ◽  
Li Sha Pan ◽  
Su Juan Pang ◽  
Xuan Chen ◽  
...  

The crystallization behavior and crystalline structure of poly (lactic acid) (PLA) filled with a novel nucleating agent (TMC328), which is a kind of aromatic amide derivatives, were investigated using differential scanning calorimetry (DSC) and wide angle X-ray (XRD). In isothermal crystallization from the melt, the present of TMC328 remarkably affected the isothermal crystalline behaviors of PLA. PLA/0.5% TMC328 sample exhibited very short crystallization half-times at 90-130 °C. Furthermore, the Avrami theory was used to describe the isothermal crystallization kinetics of PLA/TMC328 samples. It is confirmed that TMC328 showed a significant heterogeneous nucleation effect on the crystallization of PLA matrix. Moreover, XRD measurement indicates that TMC328 is a kind of α-form nucleating agent for PLA.


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