Question

Consider the melt viscosities of a sample of linear polyethylene and a sample of polyethylene with...

Consider the melt viscosities of a sample of linear polyethylene and a sample of polyethylene with short chain branches. If both samples have nearly identical molecular weight distributions, which polymer sample would you expect to have the lower melt viscosity and why?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A research group has experimented with a polyethylene glycol (PEG)-based tissue-engineering scaffold. This scaffold was then...
A research group has experimented with a polyethylene glycol (PEG)-based tissue-engineering scaffold. This scaffold was then modified with an RGD peptide sequence. In this experiment, the RGD sequence was synthesized in one of two forms: a) RGD coupled to a large PEG spacer (MW = 3400 Da) and attachment site moiety (***), or b) RGD coupled to the attachment site moiety (***) with very small PEG spacer as shown below. (MW = 800 Da). 1) Now that you know the...
1. This question is related to your knowledge of how chemical structure affects a polymer’s glass...
1. This question is related to your knowledge of how chemical structure affects a polymer’s glass transition temperature. For each pair below draw the repeat unit of the polymers, select which polymer you believe has a higher glass transition temperature, and explain Pair 1: polyethylene versus poly(vinyl alcohol) Pair 2: poly(hydroxyethyl methacrylate) versus poly(propyl methacrylate) Pair 3: polyethylene versus polypropylene 2. You have polymerized a product containing seven PMMA molecules: three of the molecules have a degree of polymerization of...
The variables height and weight could reasonably be expected to have a positive linear correlation coefficient,...
The variables height and weight could reasonably be expected to have a positive linear correlation coefficient, since taller people tend to be heavier, on average, than shorter people. Give an example of a pair of variables which you would expect to have a negative linear correlation coefficient and explain why. Then give an example of a pair of variables whose linear correlation coefficient is likely to be close to zero.
consider two hypothetical pure substances, AB(s) and XY(s). when equal molar amounts of these substances are...
consider two hypothetical pure substances, AB(s) and XY(s). when equal molar amounts of these substances are placed in separate 500 ml samples of water they undergo the following reactions, AB(s)=A+(aq)+B-(aq) and XY(s)=XY(aq). which solution would you expect to have the lower boiling point and why? I am having trouble identifing trends that would help me to understand the question.
If you run summary() command on a result of linear model fitting returned by lm(), you...
If you run summary() command on a result of linear model fitting returned by lm(), you will see a column Pr(>t). You could guess that it is a result of some t-test. How does it apply here? So far we have seen t-tests in the settings of testing sample locations. The ingredients were: 1) null hypothesis: in earlier cases we looked into the null that stated that two samples came from the distribution(s) with the same mean(s); 2) test statistic:...
Consider two loans with​ one-year maturities and identical face​ values: a(n) 7.6 % loan with a...
Consider two loans with​ one-year maturities and identical face​ values: a(n) 7.6 % loan with a 0.96 % loan origination fee and​ a(n) 7.6 % loan with a 5.1 % ​(no-interest) compensating balance requirement. What is the effective annual rate ​(EAR​) associated with each​ loan? Which loan would have the highest EAR and​ why? The EAR in the first case is nothing​%. ​(Round to one decimal​ place.) The EAR in the second case is nothing​%. ​(Round to one decimal​ place.)...
Consider the two economies, The Republic of Tesla and The Union of Edison. The Republic of...
Consider the two economies, The Republic of Tesla and The Union of Edison. The Republic of Tesla and The Union of Edison have the same depreciation rates and populations, but differ on other variables. To be specific The Republic of Tesla has the following production function, Y = 3 K, and a savings rate of .25. On the other hand The Union of Edison has the following production function, Y = 1.5 K, and a savings rate of .5. Just...
1)What does the Central Limit Theorem say, and why is it so important to inferential statistics?...
1)What does the Central Limit Theorem say, and why is it so important to inferential statistics? 2) Why would someone want to know whether a sample had more than 30 observations? 3) What is the continuity correction? 4) What is a sampling distribution? 5) What are the basic distinctions between situations in which the binomial, poisson, and hypergeometric distributions apply? 6) Suppose you have a population with mean ? and standard deviation ?. What can you say about the sampling...
Consider the following population: {7, 8, 8, 9, 9}. The value of μ is 8.2, but...
Consider the following population: {7, 8, 8, 9, 9}. The value of μ is 8.2, but suppose that this is not known to an investigator. Three possible statistics for estimating μ are Statistic 1: the sample mean, x Statistic 2: the sample median Statistic 3: the average of the largest and the smallest values in the sample A random sample of size 3 will be selected without replacement. Provided that we disregard the order in which the observations are selected,...
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean...
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean always equals the population mean. The average sample mean, over all possible samples, equals the population mean. The sample mean will only vary a little from the population mean. The sample mean has a normal distribution. 2.Which of the following statements is CORRECTabout the sampling distribution of the sample mean: The standard error of the sample mean will decrease as the sample size increases....
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT