PMID- 25574831
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150611
LR  - 20150129
IS  - 1463-9084 (Electronic)
IS  - 1463-9076 (Linking)
VI  - 17
IP  - 6
DP  - 2015 Feb 14
TI  - Influence of non-covalent modification of multiwalled carbon nanotubes on the 
      crystallization behaviour of binary blends of polypropylene and polyamide 6.
PG  - 4293-310
LID - 10.1039/c4cp05060f [doi]
AB  - Blends of polypropylene (PP) and polyamide 6 (PA6) with multiwalled carbon 
      nanotubes (MWNTs) were prepared using different processing strategies in a 
      twin-screw micro-compounder. The effect of MWNTs on the crystallization behaviour 
      of the PP phase and the PA6 phase of the blend has been investigated through 
      non-isothermal crystallization studies by differential scanning calorimetric 
      analysis. Furthermore, the effect of the addition of the compatibilizer (PP-g-MA) 
      and the modification of MWNTs (m-MWNTs) with a non-covalent organic modifier 
      (Li-salt of 6 amino hexanoic acid, Li-AHA) has also been studied in context to 
      the crystallization behaviour of the PP and PA6 phase in the blend. The 
      crystallization studies have indicated a significant increase in bulk 
      crystallization temperature of the PP phase in the blend in the presence of 
      MWNTs. Moreover, the formation of 'trans-lamellar crystalline' structure 
      consisting of PA6 'trans-crystalline lamellae' on MWNTs surface was facilitated 
      in the case of blends prepared via 'protocol 2' as compared to the corresponding 
      blends prepared via 'protocol 1'. Wide angle X-ray diffraction analysis has 
      showed the existence of a beta-polymorph of the PP phase due to incorporation of the 
      PA6 phase in the blend. Addition of MWNTs in the blends has facilitated further 
      beta-crystalline structure formation of the PP phase. In the presence of m-MWNTs, a 
      higher beta-fraction was observed in the PP phase as compared to the blend with 
      pristine MWNTs. Addition of PP-g-MA has suppressed the beta-phase formation in the 
      PP phase in the blend. X-ray bulk texture analysis revealed that incorporation of 
      PA6 as well as pristine/modified MWNTs has influenced the extent of orientation 
      of the PP chains towards specific crystalline planes in various blend 
      compositions of PP and PA6.
FAU - Mukhopadhyay, Nabaneeta
AU  - Mukhopadhyay N
AD  - Department of Metallurgical Engineering and Materials Science, Indian Institute 
      of Technology Bombay, Powai, Mumbai 400076, India. arupranjan@iitb.ac.in.
FAU - Panwar, Ajay S
AU  - Panwar AS
FAU - Kumar, Gulshan
AU  - Kumar G
FAU - Samajdar, I
AU  - Samajdar I
FAU - Bhattacharyya, Arup R
AU  - Bhattacharyya AR
LA  - eng
PT  - Journal Article
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
EDAT- 2015/01/13 06:00
MHDA- 2015/01/13 06:01
CRDT- 2015/01/10 06:00
PHST- 2015/01/10 06:00 [entrez]
PHST- 2015/01/13 06:00 [pubmed]
PHST- 2015/01/13 06:01 [medline]
AID - 10.1039/c4cp05060f [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2015 Feb 14;17(6):4293-310. doi: 10.1039/c4cp05060f.