Evidence map›Paper›PMID 37631455›Full record

ArticlePolymers2023

Crystallization and Performance of Polyamide Blends Comprising Polyamide 4, Polyamide 6, and Their Copolymers.

Yajing Zhang, Mingda Wang, Di Zhang, Yibing Wang, Li Wang, Yongjun Qiu, Liquan Wang, Tao Chen, Liming Zhao

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Polymers, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Yajing ZhangState Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Mingda WangState Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Di ZhangState Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Yibing WangState Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Li WangState Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Yongjun QiuState Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Liquan WangShanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.ORCID 0000-0002-5141-8584
Tao ChenKey Laboratory of Biobased Material Engineering, China National Light Industry, East China University of Science and Technology, Shanghai 200237, China.
Liming ZhaoState Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.

Funding

111 Project B18022Fundamental Research Funds for the Central Universities 22221818014National Key R&D Program of China 2017YFB0309302Natural Science Foundation of Shanghai, China 21ZR1416000Research and Development of Technical Standards for Bio-based Material Polybutyrolactam Project 21DZ2205900
6 · The paper itself

Abstract

Polyamide 4 (PA4) is a biobased and biodegradable polyamide. The high hydrogen bond density of PA4 bestows it with a high melting point that is close to its thermal decomposition temperature, thereby limiting the melt processing of PA4. In this study, PA4 was blended with polyamide 6 (PA6) and further modified with copolyamide 4/6 (R46). The effects of composition on the crystallization behavior of the blends were studied. The results demonstrated that the binary PA4/PA6 (B46) and ternary PA4/PA6/R46 (B46/R46) blends formed two crystalline phases (PA4- and PA6-rich phases) through crystallization-induced phase separation. With increasing PA6 content, the thermal stability and crystallinity of the B46 blend increased and decreased, respectively, and the contribution of PA6 toward the crystallization of the PA4-rich phase diminished. Molecular dynamics simulations showed the molecular chain orientation of the B46 blends well. The melting points, crystallinities, and grain sizes of the B46/R46 blends were lower than those of the B46 blends. The crystallization of the PA4-rich phase was restrained by the dilution effect of molten-state PA6, and the nucleation and crystallization of the PA6-rich phase were promoted by the presence of crystallized PA4. The B46 blends with 30-40 wt% PA6 had the best mechanical properties.

Indexed as

copolyamides 4/6crystallizationPA4/PA6 blendspolyamide 4

Identifiers

PMID37631455
PMCPMC10459628

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.