Chain Extension of Polyamide 6 Using Bisoxazoline Coupling Agents

Polyamides – Still Strong After Seventy Years

“…A more elaborate member of the family is 2,2'-(1,3-phenylene)-bis(2-oxazoline), supplied by Degussa and also by DSM as ALLINCO 1 PBO; use of this extender (among others) for the recovery of PA 66 is described by Hong et al [163] DSM suggest a range of addition of 0.2-0.8 wt.-%, which corresponds roughly to the amount of carboxyl ends typically available for reaction near the end of the polyamidation process. Lu et al [164] experimented with both BOZ and PBO (sometimes called MPBO). The starting polymer, PA 6, had carboxyl content of 71.5 mequiv.…”

Halogen-free Intumescent Flame Retardant for ABS/PA6/SMA Alloys

“…Polyamide 6 (PA6 and PA6 * ) was obtained from Yueyang Petrochemical Corp. (China); the melt viscosity of PA6 * was much higher than that of PA6. PA6 * * was prepared according to the literature [17] and its viscosity was much higher than that of PA6 * . APP (n = 1500) was supplied by Zhejiang Longyou Gede Chemical Factory (China).…”

The flame retardancy and rheological properties of PA6/MCA modified by DOPO-based chain extender

“…4,5 Chain extenders could promote the coupling reaction between two or more molecular chains to increase the molecular weight, thus improving the mechanical properties of the material. [6][7][8] The concomitance of ame-retarded and chain extension modication might hopefully enhance the ame retardancy of PA6 without deteriorating the mechanical properties. This modication may become signicant to broaden the application of PA6 in many high-end elds.…”

“…SEM images of (A) PA6, (B) PA6/MCA-14 and (C) PA6/MCA/ DEP-3 residues after the cone calorimeter test.19596 | RSC Adv., 2017,7,[19593][19594][19595][19596][19597][19598][19599][19600][19601][19602][19603] This journal is © The Royal Society of Chemistry 2017RSC Advances Paper Open Access Article. Published on 03 April 2017.…”