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
东晓发布了新的文献求助10
1秒前
Boren完成签到,获得积分10
1秒前
hanleiharry1发布了新的文献求助10
1秒前
天峰完成签到,获得积分10
1秒前
李健应助风趣的爆米花采纳,获得10
2秒前
FashionBoy应助无名采纳,获得10
3秒前
超级的丸子完成签到,获得积分10
4秒前
5秒前
隐形曼青应助murry123采纳,获得10
6秒前
ANG完成签到 ,获得积分10
6秒前
7秒前
李嘉欣发布了新的文献求助10
8秒前
8秒前
lascqy完成签到 ,获得积分10
9秒前
wbh发布了新的文献求助10
10秒前
JamesPei应助咚咚咚采纳,获得30
11秒前
小熊熊完成签到,获得积分10
12秒前
Tessa完成签到,获得积分10
12秒前
王心耳完成签到,获得积分10
13秒前
扁舟灬完成签到,获得积分10
13秒前
周婷发布了新的文献求助10
13秒前
13秒前
puff关注了科研通微信公众号
14秒前
14秒前
16秒前
稳重岩完成签到 ,获得积分10
18秒前
loski发布了新的文献求助10
19秒前
步一发布了新的文献求助10
19秒前
20秒前
20秒前
hanleiharry1发布了新的文献求助10
20秒前
20秒前
murry123发布了新的文献求助10
21秒前
痴情的寒云完成签到 ,获得积分10
21秒前
CAOHOU应助张wx_100采纳,获得10
22秒前
23秒前
ppg123应助NightGlow采纳,获得10
24秒前
24秒前
25秒前
emmm发布了新的文献求助10
26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 3989390
求助须知:如何正确求助?哪些是违规求助? 3531487
关于积分的说明 11254109
捐赠科研通 3270153
什么是DOI,文献DOI怎么找? 1804887
邀请新用户注册赠送积分活动 882087
科研通“疑难数据库(出版商)”最低求助积分说明 809174