Application of the correct design of successive self-nucleation and annealing (SSA) to study the stereo-defects and its distribution of homo- and co-polypropylene

Abstract

The SSA revealed the differences in molecular chain microstructure of different PP samples when the preliminary characterization found that the homo-polypropylene or co-polypropylene samples had the similar mechanical and thermal properties.

Roles of Chain Architecture and Polymorphic Form in Tailoring the Properties of Surface‐Roughened Biaxially Oriented Polypropylene Films for Capacitors

“…The fractionation of the stereo chain architectures was performed with the successive self-nucleation annealing (SSA) heat fractionation technique by using DSC, which was considered an effective method for quickly characterizing the distribution of stereo-defects within and between chains (Figure 1c). [27][28][29] The main parameters included the first self-nucleation temperature T s1 , cooling and melting rate 𝜏, heat treatment temperature interval ΔT, and residence time t r . Notably, T s1 has the most important impact on the accuracy of SSA.…”

A new paradigm for battery structural design towards interface-free, all-in-one cell configuration

“…160 °C, which is associated with the melting of polypropylene (PP). 44 By comparison, the endothermic peak of the LiPEAOB-Al10 film and the pure PEO film start from the same temperature of 60 °C. In addition, the LiPEAOB-Al10 film shows another peak at 70 °C.…”

The effects of a new aminosilane external donor on propylene polymerization with MgCl2-supported Ziegler-Natta catalyst

“…Successive self-nucleation and annealing (SSA) technology was designed and first reported by Müller et al [14] in 1997, which was based on the self-nucleation and annealing steps sequentially to a polymer sample originally devised by Fillon et al [13], and had been widely used to analyze the chain structures of semi-crystallized polymers [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]…”

“…The determination of the optimal annealing temperature Ts of SSA SSA thermal fractionation technique was based on the self-nucleation and annealing steps sequentially to a polymer sample, which had been widely used to analyze the chain structures of semi-crystallized polymers such as PE and PP [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Compared with 13 C-NMR and TREF fractionation, SSA fractionation wasn't only a more time-saving and practical technique in the characterization of the molecular structure of PP, but also SSA could provide important quantitative information about the lamellar thickness and its distribution of PP, which gave a more accurate characterization to the isotactic sequence length and its distribution of polypropylene [17,24,[31][32].…”