Premium
Preparation and properties of PVA films using hydroxyalkylformamides as the plasticizers
Author(s) -
Dai Hongguang,
Wang Juan,
Wang Lirong
Publication year - 2018
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24761
Subject(s) - plasticizer , materials science , vinyl alcohol , crystallinity , formamide , polymer chemistry , differential scanning calorimetry , polyvinyl alcohol , glycerol , chemical engineering , composite material , polymer , organic chemistry , chemistry , physics , engineering , thermodynamics
N,N ‐Bis(2‐hydroxyethyl)formamide, N ‐(2‐hydroxyethyl)formamide (HF), N ‐(2‐hydroxyethyl)‐ N ‐methylformamide, and N ‐(2‐hydroxypropyl)formamide were used as poly(vinyl alcohol) (PVA) plasticizers to prepare PVA films by casting method. The four synthesized compounds were hydroxyalkylformamides (HAF). Fourier‐transform infrared spectra demonstrated that hydrogen bond interaction between the new plasticizers HAF and PVA occurred. The crystallinity of PVA and PVA film was characterized by X‐ray diffraction. Differential scanning calorimetry showed that HAF could decrease the melting point ( T m ) of PVA. For PVA films with the same weight content plasticizer, the lower the molecular mass of plasticizer was, the lower the T m of PVA was. The T m of HF‐plasticized PVA was lower than that of traditional glycerol‐plasticized PVA. Generally, water‐vapor resistance of HAF‐plasticized PVA film was better than that of glycerol‐plasticized PVA film. The mechanical properties of PVA films stored at different relative humidity were studied. HAF were effective plasticizers for PVA. POLYM. ENG. SCI., 58:E145–E150, 2018. © 2017 Society of Plastics Engineers