Pioneering study on Poly(trimethylene terephthalate) grating assembly: Architecture and formation mechanism probed using X-ray microbeam

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-05-08 DOI:10.1016/j.polymer.2025.128512

Selvaraj Nagarajan , Graecia Lugito , Wei-Tsung Chuang , Jhih-Min Lin , Chun-Yu Chen , Ya-Sen Sun , Eamor M. Woo

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引用次数: 0

Abstract

Lamellar assembly of periodically ring-banded spherulites (RBS) has remained a scientific challenge for polymer physicists despite numerous exhausted attempts over the last several decades. Often, researchers relied on the classical propositions of continuous helix-twist lamellae to decipher the orientation of lamellae and lattice crystals within the RBS structures; yet compelling morphological evidence to substantiate the long-and-continuous lamellar helices have been evassive up to present. A comprehensive study of the self-assembly of lamellae within poly (trimethylene terephthalate) (PTT)-RBS has been undertaken using both synchrotron-radiation microbeam X-ray diffraction and detailed fracture-interior morphologies by scanning electron microscopy (SEM). Simultaneous small-angle and wide-angle X-ray microbeam diffraction (SAXS/WAXD) were conducted with a matrix of 676 coordinate positions on the PTT-RBS. Based on real-time micrographs, diffraction maps, and fractured micrographs, grating-assembled lamellae have been identified as the periodic crystal aggregates of PTT-RBS.

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聚对苯二甲酸三甲酯光栅组件的开创性研究：用x射线微束探测结构和形成机制

在过去的几十年里，周期性环状球粒（RBS）的片层组装一直是聚合物物理学家面临的一个科学挑战。通常，研究人员依靠经典的连续螺旋扭曲片层命题来破译RBS结构中片层和晶格晶体的取向；然而，令人信服的形态学证据，以证实长而连续的片层螺旋一直回避到目前为止。利用同步辐射微束x射线衍射和扫描电子显微镜（SEM）对聚对苯二甲酸三甲酯(PTT)-RBS中片层的自组装进行了全面研究。在PTT-RBS上以676个坐标位置的矩阵同时进行了小角和广角x射线微束衍射（SAXS/WAXD）。基于实时显微照片、衍射图和断裂显微照片，光栅组装薄片被确定为PTT-RBS的周期性晶体聚集体。

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.