Competition of shearing and cavitation effects on the deformation behavior of isotactic polypropylene during stretching

材料科学 空化 剪切(物理) 战术性 复合材料 球晶(高分子物理) 层状结构 极限抗拉强度 聚合物 聚合 机械 物理
作者
YanXu Wang,Tong Wu,Qiang Fu
出处
期刊:Polymer [Elsevier BV]
卷期号:273: 125888-125888 被引量:2
标识
DOI:10.1016/j.polymer.2023.125888
摘要

Owing to the unique cross-hatched structure of α crystal, the deformation behavior of isotactic polypropylene (iPP) differs considerably with the traditional polymers. The influence of crystalline structures on the cavitation and shearing effects of α-iPP under tensile loading is still not well established. In this work, various iPP samples were prepared via crystallizing from 0 °C to 130 °C, after which the crystalline structures were characterized via differential scanning calorimetry, polarized optical microscopy and scanning electron microscopy. The lamellar thickness and crystallinity of α-iPP precursor films change slightly, while the content of tangential lamellae in α-spherulite and the spherulite size increase significantly with the decreasing supercooling. On the other hand, the morphological evolution of α-iPP during stretching was tracked by in-situ two-dimensional small angle X-ray scattering. It is found that cavitation effect become dominant instead of shearing effect when the size of α-spherulite exceeds 25 μm. Furthermore, we disclose four typical deformation behaviors of α-iPP resulting from the competition between intra-spherulitic deformation and inter-spherulitic deformation, namely the shearing without cavitation, shearing then localized cavitation, homogeneous cavitation with concomitant shearing, and cavitation with absence of shearing. Accordingly, we construct a route for the structural evolution of α-iPP with different crystalline structures during stretching, which provides an effective guidance to produce diverse iPP films with desired structures and tunable functionalities.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
KK完成签到,获得积分10
3秒前
蓝桉完成签到,获得积分10
4秒前
zhouxuefeng发布了新的文献求助10
4秒前
5秒前
kanwenxian完成签到,获得积分20
5秒前
期刊发布了新的文献求助50
5秒前
共享精神应助小夫同学采纳,获得10
6秒前
6秒前
小蘑菇应助树袋采纳,获得10
6秒前
科研通AI5应助xn201120采纳,获得10
7秒前
7秒前
hh完成签到,获得积分20
8秒前
王彬完成签到,获得积分10
8秒前
晚来天欲雪完成签到,获得积分20
10秒前
Lc应助蓝桉采纳,获得20
10秒前
15秒前
XXXXL完成签到,获得积分10
17秒前
麦苗果果发布了新的文献求助10
19秒前
小夫同学发布了新的文献求助10
19秒前
20秒前
英姑应助谦让小松鼠采纳,获得10
20秒前
BKEL完成签到,获得积分10
23秒前
23秒前
lalala驳回了SciGPT应助
25秒前
kanwenxian发布了新的文献求助10
26秒前
今后应助解语花采纳,获得10
27秒前
七慕凉应助解语花采纳,获得10
27秒前
FashionBoy应助pineapple yang采纳,获得20
27秒前
麦苗果果完成签到,获得积分10
27秒前
Irene完成签到,获得积分10
28秒前
小二郎应助蓁66采纳,获得10
29秒前
29秒前
Hello应助陈曦采纳,获得10
29秒前
领导范儿应助hh采纳,获得10
30秒前
31秒前
艺涵发布了新的文献求助10
33秒前
孙燕应助闪闪泥猴桃采纳,获得30
34秒前
36秒前
36秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989550
求助须知:如何正确求助?哪些是违规求助? 3531774
关于积分的说明 11254747
捐赠科研通 3270278
什么是DOI,文献DOI怎么找? 1804966
邀请新用户注册赠送积分活动 882125
科研通“疑难数据库(出版商)”最低求助积分说明 809176