Estimating molecular weight of hydrocarbons
US-12140585-B2 · Nov 12, 2024 · US
Method for analyzing molecular weight of the poly-p-phenylene terephthalamide
US10161862B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10161862-B2 |
| Application number | US-201615318667-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 7, 2016 |
| Priority date | Mar 15, 2016 |
| Publication date | Dec 25, 2018 |
| Grant date | Dec 25, 2018 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A method for analyzing molecular weight of the poly-p-phenylene terephthalamide (PPTA) utilizing near infrared spectrum is provided for reducing the time required to analyze the molecular weight of PPTA. The method uses PPTA samples to build a spectrum-viscosity fitting curve. The molecular weight of an unknown PPTA is analyzed via a near infrared analysis software and the spectrum-viscosity fitting curve. The method is beneficial in that it has a short process time and high reliability.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for analyzing molecular weight of the poly-p-phenylene terephthalamide (PPTA) utilizing near infrared spectrum, comprising the following steps: (a) preparing 60˜90PPTA samples with different molecular weight, wherein the viscosity of said PPTA samples ranges from 1 to 9 dL/g; (b) dissolving respectively said PPTA samples in a concentrated sulfuric acid and detecting the viscosity thereof by an Ubbelohde viscometer; (c) scanning respectively each of said PPTA samples 1˜10 times using a near infrared spectrometer to obtain corresponding spectral data thereof, and calculating an average spectral data of said spectral values; (d) extrapolating a spectrum data-viscosity fitting curve from said viscosity data of step (b) and said spectrum data of the step (c) via a near infrared analysis software; and (e) scanning an unknown PPTA resin using said near infrared spectrometer to obtain a near infrared spectrum data and calculating the viscosity of said unknown PPTA by said spectrum-viscosity fitting curve.
Assignees
Inventors
Classifications
from aromatic diamines and aromatic dicarboxylic acids with both amino and carboxylic groups aromatically bound · CPC title
- G01N21/359Primary
using near infrared light · CPC title
Resins; Plastics · CPC title
by measuring flow of the material · CPC title
for analysing solids; Preparation of samples therefor · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10161862B2 cover?
- A method for analyzing molecular weight of the poly-p-phenylene terephthalamide (PPTA) utilizing near infrared spectrum is provided for reducing the time required to analyze the molecular weight of PPTA. The method uses PPTA samples to build a spectrum-viscosity fitting curve. The molecular weight of an unknown PPTA is analyzed via a near infrared analysis software and the spectrum-viscosity fi…
- Who is the assignee on this patent?
- Shandong Wanshengbo Sci Tech Co Ltd, Univ Tsinghua, Shngdong Wanshengbo Sci Tech Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01N21/359. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 25 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).