Abstract
Internally plasticized PVC by replacement of chlorine with castor oil derivative containing synergistic flame retardant groups of nitrogen and phosphorus, that is, castor oil derivative grafted onto PVC matrix, is reported. Low glass transition temperature (Tg) of modified PVC was produced although thermal stability was reduced. However, the migration was completely suppressed. The combination of castor oil derivative containing synergistic flame retardant groups of nitrogen and phosphorus with PVC matrix through modifying PVC materials with click reaction prepared flexible PVC materials with zero migration and enhanced flame retardant property.
Highlights
Plasticizer is an important plastic additive, which has been widely used around the world
The peak at around 970 cm−1 and 800 cm−1 was derived from P-C and P-O-CH2CH312,18, which indicated that Tris (2-hydroxyethyl) cyanuric acid (THEIC)-MR-P was obtained
The results showed that propargyl ether THEIC-MR-P was obtained. 1H NMR spectra of THEIC-MR-P was showed in Fig. 1(b), the peak at 0.7 ppm attributing to protons of -CH3 of THEIC-MR-P was stronger than THEIC-MR
Summary
Plasticizer is an important plastic additive, which has been widely used around the world. Vegetable oil based additive containing phosphorus groups[9,10], phenanthrene ring groups[11] and 1,3,5-Tris (2-hydroxyethyl) cyanuric acid (THEIC) groups[12] were synthesized and used as plasticizers for preparing flame retardant PVC materials respectively. “Click chemistry” is an efficient chemical synthesis method to prepare internally plasticized PVC materials[14,15]. We report a method to prepare PVC materials with zero migration using castor oil derivative containing synergistic flame retardant groups of nitrogen and phosphorus. The new flexible PVC materials would have potential application value in making flame retardant PVC materials without migration
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