Crystallization Behavior of Poly(ethylene terephthalate) Modified by Ionomers

Abstract

Ionomers (AClyn® Na, and AClyn® Zn) were used as nucleating additives, and their effect on crystallization of poly(ethylene terephthalate) (PET) was investigated by using differential scanning calorimetry (DSC). The results showed that the crystallization rate of PET is accelerated by both ionomers, and the ionomer containing Na+ increases the crystallization rate of PET slightly more than the ionomer containing Zn+2. In addition, the measurement of solution viscosity of PET certified that the addition of ionomers led to a minor decrease in molecular weight of PET.

Morphology and Crystallization Behavior of Poly(butylene succinate)‐Based Ionomers (PBSi)

“…[11] Recently, Yu et al manufactured poly(ethylene terephthalate) (PET) blends containing Surlyn 1 or Aclyn 1 as ionomer, and found that the incorporation of ionomers initiated heterogeneous nucleation with increasing crystallization rate. [12,13] Our previous study examined poly-(butylene adipate)-based ionomers (PBAi's) synthesized by melt polycondensation and verified that the incorporation of an ionic monomer (<5 mol-% of diacid) led to a significant reduction of fusion enthalpy. This result, together with the fact that PBAi's have a lower degree of supercooling Summary: The crystallization behavior of a poly(butylene succinate)-based ionomer (PBSi) was analyzed by morphological observations and synchrotron small-angle X-ray scattering (SAXS) experiments.…”

Effect of Methylated Cyclodextrins on the Crystallization of Poly(3‐hydroxybutyrate)

“…Commonly, the addition of nucleating agents can induce an initiation of the crystallization of a polymer at higher temperatures than those in the absence of the nucleating agents. [30][31][32] An overdose of these methylated CDs above 3 wt.-% addition exhibits a reverse effect on the crystallization of P(3HB). We have reported on the miscible blends between P(3HB) and methylated CDs [26] and previous studies on the crystallization kinetics in the miscible polymer blends have revealed that the crystallization behavior and the nucleation mechanisms were quite dependent on the composition of diluent.…”

“…According to the Avrami [38] However, though all n values were less than three, indicating the two-dimensional growth of crystallization, [40] they may roughly indicate the threedimensional spherulitic growth initiated by heterogeneous nucleation, [41] which was shown in the spherulitic morphology observed by POM analysis. The k and t 1/2 values, which represent the overall crystallization rate and are determined by the crystallization rate according to the classical theory of polymer crystallization, [31] were greatly improved by the addition of nucleating agents. Figure 11 shows the POM photographs recorded after isothermal crystallization at 90 8C.…”

In situ polymerization of poly(styrene- alt -maleic anhydride)/organic montmorillonite nanocomposites and their ionomers as crystallization nucleating agents for poly(ethylene terephthalate)

“…Recently, ionomers have been extensively used to accelerate the crystallization of PET because they can react with PET molecular chain end [5]. The ionomers, such as Surlyn which is a sodium salt of a copolymer of ethylene and methacrylic acid [11], Aclyn which is a sodium neutralized ethylene/acrylic acid copolymer [5,12], and poly(styrene-block-acrylate-potassium) copolymers (P(St-b-AK)) [13], etc. have been used as nucleating agents to accelerate the crystallization rate of PET (Fig.…”