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Analysis of Nylon 6 by Semi-Micro Scale GPC

By Miyuki Kanno

Introduction

For the room temperature analysis of Nylon (a polyamide synthetic fiber), sample preparation is made by dissolving samples in hexafluoroisopropanol (HFIP). However, a recent cost increase in HFIP has made this analysis more expensive and HFIP is considered environmentally unfriendly. The use of semi-micro separations has a significant advantage for this type of application by reducing the consumption of mobile phase.

To reduce analysis time and solvent consumption, smaller column sizes for rapid analysis are now available for use with GPC analysis.

In this report, the measurement of Nylon 6 films and fibers was performed using the LC-4000 Series RHPLC system with RI-4035 refractive index detector designed for use with semi-micro GPC columns offering high performance analysis. The solvent used is approximately 8 mL per analysis cycle and represents a 75% solvent saving compared with conventional analysis. The average molecular weight was calculated using ChromNAV-GPC, and a molecular weight calibration curve was constructed using a polymethylmethacrylate (PMMA) standard.

Experimental

Keywords

310013GRE

Results

Fig.1 Chromatograms of PMMA standard.

Figure 1. Chromatogram of PMMA standard (The values on the chromatogram indicate the Mp, peak top molecular weight, for each PMMA standard)

Fig. 2 shows the molecular weight calibration curve using PMMA standard. Fig. 3 displays the chromatogram of Nylon 6 film and molecular weight calibration curve, and its molecular weight distribution curve is in Fig. 4. Fig. 5 is the chromatogram of Nylon 6 fiber and molecular weight calibration curve, and its molecular weight distribution curve is in Fig. 6. Table 1 shows the result of each average molecular weight calculation converted to PMMA.

Figure 2 Molecular weight calibration curve by the PMMA standard.

Figure 3 Chromatogram of Nylon 6 film and molecular weight calibration curve (The values indicate each Mp converted by PMMA)

Figure 4 Molecular weight distribution curve of Nylon 6 film

Figure 5 Chromatogram of Nylon 6 fiber and molecular weight calibration curve (The integrated indicate each Mp converted by PMM

Figure 6 Molecular weight distribution curve of Nylon 6 fiber

Table 1 Average molecular weight calculation of Nylon 6 film and fiber converted by PMMA

	Mn	Mw	Mz	Mv	Mw/Mn	Mz/ Mw
Film	16570	70258	130381	70258	4.24	1.86
Fiber	12854	40210	69148	40210	3.13	1.72

This document has been prepared based on information available at the time of publication and is subject to revision without notice. Although the contents are checked with the utmost care, we do not guarantee their accuracy or completeness. JASCO Corporation assumes no responsibility or liability for any loss or damage incurred as a result of the use of any information contained in this document. Copyright and other intellectual property rights in this document remain the property of JASCO Corporation. Please do not attempt to copy, modify, redistribute, or sell etc. in whole or in part without prior written permission.

About the Author

Miyuki Kanno

Introduction

To reduce analysis time and solvent consumption, smaller column sizes for rapid analysis are now available for use with GPC analysis.

Experimental

Results

Fig.1 Chromatograms of PMMA standard.

Table 1 Average molecular weight calculation of Nylon 6 film and fiber converted by PMMA

	Mn	Mw	Mz	Mv	Mw/Mn	Mz/ Mw
Film	16570	70258	130381	70258	4.24	1.86
Fiber	12854	40210	69148	40210	3.13	1.72

Keywords

310013GRE

JASCO

Industry

Technique

Analysis of Nylon 6 by Semi-Micro Scale GPC

Introduction

Experimental

Keywords

Results

About the Author

Designed in Tokyo. TRUSTED globally.

Industry

Technique

Introduction

Experimental

Keywords

Results

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About the Author