A) A large molecule composed of repeating structural units B) A single atom C) A small inorganic molecule D) A type of metal
A) Condensation polymerization B) Decomposition polymerization C) Ring-opening polymerization D) Addition polymerization
A) The temperature at which the polymer decomposes B) The temperature at which the polymer transitions from a glassy to a rubbery state C) The temperature at which the polymer melts D) The temperature at which the polymer crystallizes
A) To decrease polymer density B) To reduce polymer chain length C) To enhance polymer solubility D) To increase mechanical strength and stability
A) Molecular weight has no effect on viscosity B) Increased molecular weight decreases viscosity C) Increased molecular weight leads to higher viscosity D) Increased molecular weight leads to lower elasticity
A) To explain the thermodynamics of polymer solutions and blends B) To model polymer chain conformation C) To predict the mechanical properties of polymers D) To determine polymer degradation kinetics
A) To inhibit polymer chain flexibility B) To promote the formation of small crystalline regions in a polymer C) To increase the glass transition temperature D) To enhance polymer solubility
A) To reduce polymer flexibility B) To decrease polymer durability C) To enhance or modify the properties of polymers D) To break down polymer chains
A) A polymer with a high degree of crystallinity B) A polymer composed of two or more different monomers C) A single monomer molecule D) A polymer with only one repeating unit
A) To induce polymer degradation B) To increase mechanical strength and prevent slippage of polymer chains C) To decrease polymer solubility D) To promote polymer crystallization
A) The glassy state is for amorphous polymers only B) In the glassy state, the polymer is hard and brittle C) The glassy state does not affect polymer properties D) The glassy state promotes polymer flexibility
A) Flory B) Doi and Edwards C) Pierre-Gilles de Gennes D) I. M. Lifshitz
A) Simple random walk B) Directed walk C) Brownian motion D) Self-avoiding random walk
A) N/b. B) 0. C) bN. D) √N.
A) ⟨R ⋅ R⟩ = b³ B) ⟨R ⋅ R⟩ = N²b² C) ⟨R ⋅ R⟩ = Nb D) ⟨R ⋅ R⟩ = 3Nb²
A) Good solvent B) Theta solvent C) Bad solvent D) None of these
A) x_rms = bN. B) x_rms = b√N. C) x_rms = N/b. D) x_rms = √bN.
A) Condensed matter physics B) Thermodynamics C) Statistical physics D) Polymer chemistry
A) 3/5 B) 1/2 C) 1/4 D) 1/3
A) Becomes an ideal chain B) Forms a fractal object C) Behaves like a solid sphere D) Expands significantly
A) ⟨ri ⋅ rj⟩ = R² B) ⟨ri ⋅ rj⟩ = 3b²δij C) ⟨ri ⋅ rj⟩ = b²δij D) ⟨ri ⋅ rj⟩ = Nδij
A) Worm-like chain model B) Real chain models C) Ideal chain models D) Hindered rotation model
A) S(R) = kB ln(Ω(R)) B) S(R) = Ω(R)/kB C) S(R) = kBΩ(R) D) S(R) = ln(kBΩ(R))
A) About 50 nm. B) Exactly 25 nm. C) More than 100 nm. D) Less than 10 nm.
A) Ω(R) = R/P(R) B) Ω(R) = P(R)/c C) Ω(R) = cR D) Ω(R) = cP(R)
A) Binomial distribution B) Gaussian distribution C) Exponential distribution D) Uniform distribution
A) None of these B) Good solvent C) Bad solvent D) Theta solvent
A) Positions of minima in rotational potential energy. B) Fixed bond angles due to chemical bonding. C) Persistence length. D) A Boltzmann factor based on potential energy.
A) ΔF = TΔS(R) B) ΔF = S(R)/T C) ΔF = kBΔS(R) D) ΔF = -TΔS(R)
A) Freely-jointed chain model B) Worm-like chain model C) Rotational isomeric state model D) Finite extensible nonlinear elastic model
A) Brownian motion B) Simple random walk C) Directed walk D) Self-avoiding random walk
A) Worm-like chain model B) Rotational isomeric state model C) Freely-rotating chain D) Hindered rotation model |