Effect of liquid plasticizers on crystallization of PCL
Thus, to obtain soft PVC products with improve migration resistance while avoiding PCL crystallization, the total content of plasticizer (including both liquid plasticizer and PCL)...
Effect of liquid plasticizers on crystallization of PCL
As plasticizer content increases or its compatibility with PVC decreases, interaction competition becomes more intense and consequently faster crystallization of PCL occurs.
Synergistic and counteractive effects of Bi-component
The results showed that the PCL crystallization favored by liquid plasticizers in PVC/PCL/plasticizer blends was induced by interaction competition between PVC/plasticizer and PVC/PCL. In the cases of PVC/PCL/plasticizer blends, the weak interaction of PVC/PCL enhanced the freely mobile of PCL chains to enhance the crystallization ability of PCL.
Effect of liquid plasticizers on crystallization of PCL
As shown in Figure 3, with increasing amount of liquid plasticizer was replaced by PCL, plasticizer loss by solvent extraction decreased dramatically. For instance, in n-hexane extraction...
Effect of POSS-NH2-grafted different plasticizers on the
The values of crystallization and melting enthalpy are shown in Table 1. The POSS-NH 2 reduces the values of melting enthalpy ( Hm,SC) of SC, inhibits the crystallization ability of PLLA/PDLA. Because the addition of POSS-NH 2 inhibits the formation of SC. Table 1 Data from differential scanning calorimetry of POSS-NH2/ PLLA/PDLA blends
- Is PCL crystallization favored by liquid plasticizers in PVC/PCL/plasticizer blends?
- It is concluded that PCL crystallization favored by liquid plasticizers in PVC/PCL/plasticizer blends was induced by interaction competition between PVC/plasticizer and PVC/PCL.
- How to control PCL entanglement during crystallization?
- Mixed solvent was used to control the concentration PCL starts to crystallize. Entanglement number ( N) during crystallization can be tuned according to N / N0 = ϕ1.3. Reduced entanglement leads to thinner amorphous region and higher crystallinity.
- How long does it take ethanol to crystallize PCL?
- Depending on the content of ethanol, crystallization of PCL began within several hours to two days, which was determined by appearance of white precipitation of PCL. The weight loss was recorded to calculate the weight fraction of PCL at the beginning of crystallization, which will be referred to as conset hereafter.
- What is the most striking change in polymer crystallization?
- The most striking change is that polymer can hardly crystallize completely , , , especially in the commonly used molecular weight range , , , , . Entanglement has been considered as an important origin of the semi-crystalline character, which restricts the adjustment of segments during crystallization.
- What is the crystallization rate of PCL in PVC/PCL/diisononyl phthalate?
- For instance, crystallization rate of PCL in PVC/PCL/diisononyl phthalate (DINP) (100/40/100) was 3.7 times faster than in PVC/PCL/DINP (100/40/80), while crystallization rate of PCL in PVC/PCL/dioctyl adipate (DOA) (100/40/100) was 8.3 times faster than in PVC/PCL/diisononyl cyclohexane-1,2-dicarboxylate (DINCH) (100/40/100).
- What is the concentration of PCL solution?
- PCL solution with a concentration of 0.15 g/ml (15% w/v) was first prepared at room temperature (25–27 °C). The solvent used was a mixture of ethanol and chloroform, of which the volume ratio of ethanol to chloroform is 1.9:1, 1.4:1, 1.0:1, 0.5:1, 0.3:1 and 0:1, respectively.
