Characterization of the Polycaprolactam- or
Polycaprolactone-Grafted Polyurethane and the
Grafting Effect on Water Vapor Permeation and
Department of Chemistry, The University of Suwon, Hwaseong, 18323 Korea
JI-EUN PARK, JI SOM KIM, BYOUNG CHUL CHUN
School of Nano Engineering, Inje University, Gimhae, 50834 Korea
Correspondance to: B. C. Chun; e-mail: firstname.lastname@example.org.
Received: May 30, 2016
Accepted: August 17, 2016
Polycaprolactam or polycaprolactone was graft-polymerized onto polyurethane (PU) to control the water vapor
permeation and improve the tensile strength of PU. The tensile strength of the PU sharply increased with the grafting of poly-
caprolactam or polycaprolactone, without a decrease in the tensile strain. The soft segment melting properties did not signiﬁcantly
change with the increase in the lactam or lactone content. The shape recovery and shape retention of the PU series remained high
after the grafting. The water vapor permeability (WVP) was reduced by the grafting of the polycaprolactam, whereas the WVP
was increased by the grafting of polycaprolactone. © 2016 Wiley Periodicals, Inc. Adv Polym Technol 2018, 37, 21771; View this
article online at wileyonlinelibrary.com. DOI 10.1002/adv.21771
Grafting, Polycaprolactam, Polycaprolactone, Polyurethane
olycaprolactam, also known as Nylon 6, has a structure
similar to Nylon 6,6 and is known for its toughness,
high tensile strength, elasticity, abrasion resistance, and resis-
tance to acids and bases.
Therefore, it has been applied to
various ﬁelds requiring physical strength, impact and abrasion
resistance, and chemical inertness. For example, polycaprolac-
tam has been used as the main polymer frame for clay
nanocomposite membranes capable of gas permeation con-
Transparent poly(methyl methacrylate)-based nanocom-
posite ﬁlms containing polycaprolactam and graphene
demonstrated enhanced tensile mechanical properties without
a signiﬁcant decrease in transparency.
Temperature and pH-
sensitive Nylon membranes were developed by the surface
modiﬁcation of Nylon membranes with polyacrylamide and
Nylon 6 was used as a polymer
frame for the design of a nanoﬁber-based electrocatalytic
immunosensor to electrochemically detect a tumor suppressor
Nylon ﬁber coupled with polyamidoamine den-
drimers exhibited enhanced dye ability due to the enhanced
interaction between its amino groups and anionic dyes.
In contrast, polycaprolactone is a ﬂexible and biodegrad-
able polymer used as a soft segment in polyurethane (PU)
synthesis and as a plasticizer for polyvinylchloride (PVC). For
example, PU containing polycaprolactone as a soft segment
has been applied in a degradable drug delivery vehicle sensi-
tive to the pH and ionic strength of the surrounding solution.
Biodegradable PU using polycaprolactone as a soft segment
and an aromatic chain extender demonstrated hydrolytic
biodegradability and better tensile strength and thermal stabil-
PU containing a polycaprolactone soft segment was used
as a tissue engineering scaffold for soft tissue repair and
A polycaprolactone/PU blend was tested as a
biodegradable polymeric endoaortic paving material for the
treatment of atherosclerotic arteries.
In comparison to polycaprolactam and polycaprolactone,
the PU elastomer is known for its excellent shape recovery,
impact resistance, and ﬂexibility as well as its broad range of
This research was supported by Basic Science Research Program through the
National Research Foundation of Korea (NRF) funded by the Ministry of Educa-
This study was supported by the R&D Center for Valuable Recycling(Global-Top
R&BD Program) of the Ministry of Environment.(Project No.:R2-11_2016002240004).
[Correction added on October 26, 2016, after the ﬁrst online publication:
Funding information has been updated.]
Advances in Polymer Technology, Vol. 37, No. 4, 2018, DOI 10.1002/adv.21771
© 2016 Wiley Periodicals, Inc.
21771 (1 of 10)